NSK STANDARD BALL SCREWS COMPACT FA SERIES

Transcription

1 NSK STNDRD BLL SCREWS COMPCT F SERIES Quiet, high-speed operating performance. Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com -

2 Table of Contents Selection of ball screws Three types of compact F Series are available. Choose optimal types for your application. NSK Standard Ball Screws Compact F PSS Type for general use... 4, 8-31 ccuracy grade: C5 grade of JIS xial play: shaft dia. 6 and 8 mm;.5 mm or less shaft dia. 1 mm or over; Compact F USS Type for high-accuracy and clean environments... 5, ccuracy grade: C3 grade of JIS xial play: Compact F FSS type for transfer equipment...6, ccuracy grade: Ct7 grade of JIS xial play:.1 mm or less Page Support Unit Square Type For general use, for clean use, space saving (low-profile type) Round Type For general use, for clean use Square Type For simple support side Lead Screw shaft dia. Combinations of screw shaft diameter and lead Unit: mm PSS type USS type FSS type 2 Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com -

3 NSK Standard Ball Screws: Compact F Series Compact F Series ball screws incorporate NSK's ball recirculation system and offer quiet, high-speed performance. In order to respond quickly to a wide range of needs, NSK offers four-week delivery on common sizes. These high-performing ball screws are ready for use in a variety of industries including: semiconductor manufacturing, medical equipment, factory automation and general industrial use. The Compact F Series includes the following types to meet your application requirements: - PSS Type which offers various sizes for general use. - USS Type for high accuracy and clean environment use. - FSS Type for transfer equipment. Features Quick delivery Domestic manufacturing and comprehensive stocking program ensure four-week delivery and reduced shipping costs. Compact ball screw The outside diameter of the ball nut is as much as 3% smaller than those of existing NSK products. Compact size enables all sorts of equipment and devices, such as linear stages, to be smaller. NSK has also designed low profile support units, specific for the Compact F series, enabling a unique space-saving design. Quiet operation The noise level of ball screws has been reduced by 6 db, about half of what is sensed by the ear. Ball screws subsequently produce a quieter and gentler sound. Noise data Shaft dia. 25 mm, lead 5 mm Existing F Series Compact F Series (Microphone was positioned at a distance of 4 mm for all noise measurements.) Comparison of existing F Series and Compact F Series 13 mm more compact (shaft dia. 2, lead 1) High-speed operation They handle speeds up to 5 min-1. This capability dramatically expands the range of service conditions. Note: Please refer to the dimension table for details of permissible rotational speed. rease fitting provided as standard equipment The new ball screws are equipped with a grease fitting (M5.8). Lubrication ports are provided in two locations to facilitate maintenance. The ball screws can be easily connected to an integrated lubrication system. Contact seal Compact, thin plastic seal is available and helps to minimize grease dispersion and maintain a clean work environment. Existing support unit > New low-profile support unit Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com - 3

4 Compact F Series: PSS Type for eneral Use pplications Semiconductor manufacturing equipment, LCD manufacturing equipment, material handling equipment, measuring equipment, medical equipment, etc. ccuracy grade and axial play ccuracy grade: C5 grade of JIS Wide variation xial play 1) Shaft dia. 6 and 8 mm:.5 mm or less 2) Shaft dia. 1 mm or over: (Oversize ball preload) Various combinations of shaft diameter, lead and stroke are available to meet a wide range of customer needs. Shaft end support The low-profile support units are compatible for the Compact F Series. Each end of the ball screw shaft is designed to fit support unit, no detailed design after purchase is necessary. Existing support unit Support unit è Low-profile support unit Shaft dia Combinations of shaft diameter, lead and stroke Lead Page Recommended support unit Fixed Simple 8 p* WBK4-1M (square) p* WBK4-11M (round) - 1 p* WBK6-1M (square) p* WBK6-11M (round) WBK8-1B WBK8S-1B p p p p p WBK8-1B WBK8S-1B 3 p p p p p 5 1 WBK12-1B p p p p p p p p p WBK1-1B WBK12S-1B 3 p p p p p p p p p p p p p p p p p p 3 p p p p p p p p p 2-25 WBK15-1B WBK15S-1B 4 p p p p p p p p p 6 p p p p p p p p p WBK2-1 WBK2S-1 3 p p p p p p p p 5 p p p p p p p p *For shaft diameter 6 and 8, length shown is overall length. Stocked: 4-week delivery. p Contact NSK for availability. Reference number PSS COMPCT F PSS TYPE 15 SCREW SHFT DIMETER (MM) 5 LED (MM) N1D NSK CONTROL NUMBER 361 SCREW SHFT LENTH (MM) 4 Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com -

5 Compact F Series: USS Type for High-ccuracy and Clean Room Use pplications Semiconductor manufacturing equipment, LCD manufacturing equipment, and inspection equipment for clean room environments. ccuracy grade and axial play ccuracy grade: C3 grade of JIS Low-dust emission xial play: (Oversize ball preload) L2 clean grease is used as standard and reduces dust particle generation 9% compared to lithium grease 1/1 of dust particles generated with L2 grease Ideal for clean room environmental use Dust particle amount (.1 μm or larger) [particles/28.3 litle] Ball screw Shaft dia. 12 Lead 5 Rotational speed 1 min -1 F Series (eneral grease) Compact F USS type (L2 rease) Time, h Dust particle amount (.5 μm or larger) [particles/28.3 litle] Ball screw Shaft dia. ボールねじ 12 軸径 12 Lead 5 リード 5 Rotational 回転数 speed 1min1 min -1-1 F Series (eneral grease) Compact F USS type (L2 rease) Time, h Shaft end support Low-profile support units for clean environments are available. Combinations of screw shaft diameter, lead and stroke Shaft dia. Lead Stroke Recommended support unit Page Fixed Simple pplication WBK8-1B WBK8S-1B Low WBK8-1C WBK8S-1C Clean WBK8-1B WBK8S-1B Low WBK8-1C WBK8S-1C Clean WBK12-1B WBK12S-1B Low WBK12-1C WBK12S-1C Clean Reference number USS COMPCT F USS TYPE 15 SCREW SHFT DIMETER (MM) 5 LED (MM) N1D NSK CONTROL NUMBER 361 SCREW SHFT LENTH (MM) Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com - 5

6 Compact F Series: FSS Type for Transfer Equipment pplications Transfer equipment used in industrial fields such as automotive, semiconductor, and medical equipment. ccuracy grade and axial play ccuracy grade: Ct7 grade of JIS Easy stroke setting xial play:.1 mm or less Flexible stroke setting with fixed-simple support by means of mounting support unit (simple support side) directly to ball screw thread outside diameter. Since corner cutting is not necessary, customers can cut ball screws, which results in reduced cost and lead time. If necessary, NSK can cut shaft if requested. Contact NSK for more information. Precautions During the cutting process, be careful not to let metal particles or burrs fall inside the ball nut. Customers are also advised to treat the cut surface. When inserting the support unit (simple support side), apply oil or grease on the outside of the shaft and inside the bearing. Shaft end support Fixed side: The low-profile support units compatible for compact F PSS type are available. Simple side: Proprietary support units are available. Easy stroke setting by cutting the shaft end and burring. Design precautions Permissible rotational speed varies when using cut screw shaft. To determine permissible rotational speed, calculate two items below. Use smaller number to determine permissible rotational speed. Critical speed which is the resonance vibration of the shaft. (Refer to the technical description of the catalog "Precision Machine Components".) Maximum rotational speed 5 min-1 Shaft dia. Lead Combinations of shaft diameter, lead and shaft length Overall shaft length Recommended support unit Page Fixed Simple WBK8-1B WBK12SF-1B WBK12-1B WBK15SF-1B WBK15-1B WBK2SF-1B WBK2-1 WBK25SF-1 Reference number FSS COMPCT F FSS TYPE 15 SCREW SHFT DIMETER (MM) 1 LED (MM) N1D NSK CONTROL NUMBER 1 SCREW SHFT LENTH (MM) 6 Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com -

7 Precautions Design (1) If the left shaft end of a ball screw (opposite driven side) is the shape I, and is supported with the fixed-fixed" supporting method, you should be aware that the operating life of support bearings may drop due to thermal expansion of the screw shaft, depending on usage conditions. In this case, you should consider a structure that can absorb thermal expansion of the screw shaft if necessary. Please consult NSK for detailed examination. (2) For general precautions concerning ball screws, please see NSK Catalog No. E3162 "Precision Machine Components." Usage and handling Ball screws are precision products and should be treated as follows: Lubrication (1) Compact F Series ball screws are packed and coated with lubrication grease at the factory, and require no further lubrication under ordinary circumstances. If the surface of the grease becomes contaminated with dirt or metal powder under operation, clean it with white kerosene and replenish with new grease of the same kind through the oil hole (grease fitting) on the ball nut. Check lubrication void mixing different types of grease. (2) Lubricant should be checked after the first 2 to 3 months of operation. If excessively dirty, we recommend you wipe away the old grease and replenish with a generous quantity of grease. fter that, grease should be checked and replenished once a year under ordinary circumstances, but the period may vary depending upon the service environment. Handling (1) Never disassemble the ball screw, otherwise dirt may contaminate the inside of the unit and affect precision or result in equipment failure. (2) Compact F Series ball screws incorporate a new ball re-circulation system. Consequently, only Do not disassemble NSK authorized plants should conduct disassembly and reassembly. If the nut accidentally comes off the screw shaft or is dropped, contact NSK. We can perform inspection and repair if needed. (3) When the ball screw is erected upright, the screw shaft or nut could fall by force of its own weight and result in injury. If dropped, the ball grooves could be dented or re-circulation parts damaged, resulting in loss of function. This would require the ball screw to be inspected by NSK. Beware of dropping If so, be sure to send the ball screw to NSK and we will check it for a fee. Usage (1) Ball screws should be used in a clean environment. The ball screws should be installed with a dust cover to prevent the entry of debris such as dust and metal powder. If foreign matter is allowed to contaminate the ball screw, this could not only cause the ball screw to lose some of its function, but also result in clogging and damaging the re-circulation system parts, or cause the table to fall Dust control or a similar serious accident. 8 C (2) Compact F Series ball screws are designed to be used in a service temperature Max environment of 8 C or lower. Do not allow the service temperature limit to be exceeded. In some cases, using ball screws in temperatures above 8 C might lead to damage of recirculation system parts or seal parts. Contact NSK if 8 C must be exceeded. Caution max. temperature Compact F Series options Consult with NSK for information regarding shaft end machining, reversing ball nut direction and other options. Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com - 7

8 Compact F Series Screw shaft diameter 6 mm, Lead 8 and 12 mm E M h E E L L t quenching range L Reference no. Screw shaft dia. Lead Effective turns of balls Basic load ratings (N) Dynamic Static Stroke max. Nut length Screw shaft dimensions d C a C a L L t L 1 PSS68ND PSS68NBD PSS612ND PSS612NBD Notes 1. Contact NSK if permissible rotational speed is to be exceeded. 8 Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com -

9 PSS Type for eneral Use 2-φ3.4drill thru (equally spaced) Ball screw specification Ball dia./screw shaft root dia. 1.2 / 4.9 PCD 21 Ball circle dia. 6.2 ccuracy grade/axial play C5 /.5 mm or less Factory-packed grease NSK grease PS2 Recommended support unit For drive side (Fixed) WBK4-1M (square) P WBK4-11M (round) P Cross-section - Lead accuracy Target value Error Variation Dynamic preload torque Mass Permissible rotational speed Internal spatial volume of nut Standard volume of grease replenishing T e p V u (N cm) (kg) (min -1 ) 1 (cm 3 ) (cm 3 ) or less Service temperature range is to 8ºC. 3. Use of NSK support unit is recommended. Refer to pages 46 to 49 for details. Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com - 9

10 Compact F Series Screw shaft diameter 8 mm, Lead 1 and 15 mm E M h6.1 L E.5 E 7 L t quenching range L Reference no. Screw shaft dia. Lead Effective turns of balls Basic load ratings (N) Dynamic Static Stroke max. Nut length Screw shaft dimensions d C a C a L L t L 1 PSS81ND PSS81NBD PSS815ND PSS815NBD Notes 1. Contact NSK if permissible rotational speed is to be exceeded. 1 Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com -

11 PSS Type for eneral Use 2-φ3.4drill thru (equally spaced) PCD 25 Ball screw specification Ball dia./screw shaft root dia / 6.6 Ball circle dia. 8.3 ccuracy grade/axial play Factory-packed grease C5 /.5 mm or less NSK grease PS2 Recommended support unit For drive side (Fixed) Cross-section - WBK6-1M (square) P WBK6-11M (round) P Lead accuracy Target value Error Variation Dynamic preload torque Mass Permissible rotational speed Internal spatial volume of nut Standard volume of grease replenishing T e p V u (N cm) (kg) (min -1 ) 1 (cm 3 ) (cm 3 ) or less Service temperature range is to 8ºC. 3. Use of NSK support unit is recommended. Refer to pages 46 to 49 for details. Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com

12 Compact F Series Screw shaft diameter 1 mm, Lead 5 and 1 mm -.6 φ φ23 g6 2-thin plastic seal (synthetic plastic) C φ M φ6 φ6 h6.1 E φ1 φ φ8 F F 9.1 L (7) 11 6 (8.7) (8.1) (3) L t(quenching range) 5 L a 4 (8) 9 E.5 E L Reference no. Screw shaft Basic load ratings (N) Stroke Nut Lead Screw shaft dimensions dia. length Dynamic Static Max. Nominal d C a C a L t -L L L t L a L PSS15N1D PSS15N1D PSS15N1D PSS15N1D PSS15N1D PSS11N1D PSS11N1D PSS11N1D PSS11N1D Notes 1. Indicates ball screw preload control value. pproximately 2. N cm of torque is added due to thin plastic seals. 2. Contact NSK if permissible rotational speed is to be exceeded. 12 Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com -

13 PSS Type for eneral Use 4-φ4.5 drill thru φ8 c'bore 4.5 depth 3 3 Preload type Ball screw specification Oversize ball (P-preload) PCD 33 Ball dia./screw shaft root dia. 2. / 8.2 Ball circle dia. 1.3 ccuracy grade/axial play C5 / 14 Factory-packed grease NSK grease PS2 21 Recommended support unit rease fitting (oil hole, M5.8 tap) Plug (oil hole, M5.8 tap) Cross-section - For drive side (Fixed) For opposite to drive side (Simple) WBK8-1B (square, low) P WBK8S-1B (square, low) P 5-51 WBK8-11 (round) P WBK8-11B (round, high-load) P Lead accuracy Shaft run-out Dynamic preload torque Target value Error Variation Mass Permissible rotational speed (min -1 ) *2 Internal spatial volume of nut Standard volume of grease replenishing T e p V u C (N cm) *1 (kg) Fixed-simple (cm 3 ) (cm 3 ) to to to to to to to to to Service temperature range is to 8ºC. 4. Use of NSK support unit is recommended. Refer to pages 46 to 51 for details. Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com

14 Compact F Series Screw shaft diameter 12 mm, Lead 5, 1, 2 and 3 mm thin plastic seal (synthetic plastic) C E -.6 φ5.7 φ φ6 φ8 M8 1. φ φ24 g6 φ6 h6 φ44 F E 9 (8.1).5 F (8.7) (7) 11 L L t(quenching range) L a (3) L E L Reference no. Screw shaft Basic load ratings (N) Stroke Nut Lead Screw shaft dimensions dia. length Dynamic Static Max. Nominal d C a C a L t -L L L t L a L L 1 PSS125N1D PSS125N1D PSS125N1D PSS125N1D PSS125N1D PSS125N1D PSS121N1D PSS121N1D PSS121N1D PSS121N1D PSS121N1D PSS122N1D PSS122N1D PSS122N1D PSS122N1D PSS122N1D PSS123N1D PSS123N1D PSS123N1D PSS123N1D PSS123N1D Notes 1. Indicates ball screw preload control value. pproximately 2. N cm of torque is added due to thin plastic seals. 2. Contact NSK if permissible rotational speed is to be exceeded. 14 Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com -

15 PSS Type for eneral Use φ4.5 drill thru φ8 c'bore 4.5 depth Preload type Ball screw specification Oversize ball (P-preload) PCD 34 Ball dia./screw shaft root dia. 2. / 1.2 Ball circle dia ccuracy grade/axial play C5 / Factory-packed grease Recommended support unit NSK grease PS2 rease fitting (oil hole, M5.8 tap) 3 Plug (oil hole, M5.8 tap) Cross-section - For drive side (Fixed) For opposite to drive side (Simple) WBK8-1B (square, low) P WBK8S-1B (square, low) P 5-51 WBK8-11 (round) P WBK8-11B (round, high-load) P Lead accuracy Shaft run-out Dynamic preload torque Target value Error Variation Mass Permissible rotational speed (min -1 ) *2 Internal spatial volume of nut Standard volume of grease replenishing T e p V u C (N cm) *1 (kg) Fixed-simple (cm 3 ) (cm 3 ) to to to to to to to to to to to to to to to to to to to to to Service temperature range is to 8ºC. 4. Use of NSK support unit is recommended. Refer to pages 46 to 51 for details. Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com

16 Screw shaft diameter 15 mm, Lead 5 and 1 mm Shape II φ51 Compact F Series φ φ L.12 2-thin plastic seal (synthetic plastic) C E F M φ1 h6 Shape I.17 M φ1 F φ φ14 6 φ φ28 g6.1 L 6 (8.7) (7) 11 (8.1) (3) 8 φ φ12 E E.5 F L t(quenching range) L a 45 L Reference no. Screw shaft Basic load ratings (N) Stroke Nut Lead Screw shaft dimensions dia. length Dynamic Static Max. Nominal d C a C a L t -L L L t L a L PSS155N1D PSS155N1D PSS155N1D PSS155N1D PSS155N1D PSS155N1D PSS155N1D PSS151N1D PSS151N1D PSS151N1D PSS151N1D PSS151N1D PSS151N1D PSS151N1D PSS151N1D PSS151N1D Notes 1. Indicates ball screw preload control value. pproximately 2. N cm of torque is added due to thin plastic seals. 2. Contact NSK if permissible rotational speed is to be exceeded. 16 Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com -

17 PSS Type for eneral Use φ5.5 drill thru φ9.5 c'bore 5.5 depth Ball screw specification Preload type Oversize ball (P-preload) Ball dia./screw shaft root dia / 12.6 PCD 39 Ball circle dia ccuracy grade/axial play C5 / Factory-packed grease NSK grease LR Recommended support unit rease fitting (oil hole, M5.8 tap) For drive side (Fixed) (Fixed) For opposite to drive side (Simple) WBK12-1B (square, low) P WBK1-1B (square, low) P WBK12S-1B (square, low) P 5-51 WBK12-11 (round) P WBK1-11 (round) P Plug (oil hole, M5.8 tap) Cross-section - Left shaft end (opposite driven side) Lead accuracy Shaft run-out Dynamic preload torque Target value Error Variation Mass Permissible rotational speed (min -1 ) *2 Internal spatial volume of nut Standard volume of grease replenishing T e p V u C (N cm) *1 (kg) Fixed-simple Fixed-Fixed (cm 3 ) (cm 3 ) to to II to to _ to to to to to II to to _ to to to I to to Service temperature range is to 8ºC. 4. Use of NSK support unit is recommended. Refer to pages 46 to 51 for details. Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com

18 Compact F Series Screw shaft diameter 15 mm, Lead 2 and 3 mm Shape II φ φ L.12 2-thin plastic seal (synthetic plastic) C E F M φ1 h6 Shape I.17 M φ1 F φ φ14 6 φ φ32 g6 L.1 6 (8.7) (7) 11 (3) (8.1) φ55 8 φ φ12 E E.5 F L t(quenching range) L L a 45 L Reference no. Screw shaft Basic load ratings (N) Stroke Nut Lead Screw shaft dimensions dia. length Dynamic Static Max. Nominal d C a C a L t -L L L t L a L L 1 PSS152N1D PSS152N1D PSS152N1D PSS152N1D PSS152N1D PSS152N1D PSS152N1D PSS152N1D PSS152N1D PSS153N1D PSS153N1D PSS153N1D PSS153N1D PSS153N1D PSS153N1D PSS153N1D PSS153N1D PSS153N1D Notes Indicates ball screw preload control value. pproximately 2. N cm of torque is added due to thin plastic seals. 2. Contact NSK if permissible rotational speed is to be exceeded. Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com -

19 PSS Type for eneral Use φ5.5 drill thru φ9.5 c'bore 5.5 depth Ball screw specification Preload type Oversize ball (P-preload) Ball dia./screw shaft root dia / 12.2 PCD 43 Ball circle dia ccuracy grade/axial play C5 / Factory-packed grease NSK grease LR Recommended support unit rease fitting (oil hole, M5.8 tap) For drive side (Fixed) (Fixed) For opposite to drive side (Simple) WBK12-1B (square, low) P WBK1-1B (square, low) P WBK12S-1B (square, low) P 5-51 WBK12-11 (round) P WBK1-11 (round) P Plug (oil hole, M5.8 tap) Cross-section - Left shaft end (opposite driven side) Lead accuracy Shaft run-out Dynamic preload torque Target value Error Variation Mass Permissible rotational speed (min -1 ) *2 Internal spatial volume of nut Standard volume of grease replenishing T e p V u C (N cm) *1 (kg) Fixed-simple Fixed-Fixed (cm 3 ) (cm 3 ) to to II to to _ to to to I to to to II to to to _ to to to I to to Service temperature range is to 8ºC. 4. Use of NSK support unit is recommended. Refer to pages 46 to 51 for details. Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com

20 Compact F Series Screw shaft diameter 2 mm, Lead 5 and 1 mm Shape II φ φ L thin plastic seal (synthetic plastic) C E Shape I M F φ15 F -.11 φ F 4 φ φ φ36 g6.11 L 6(8.7) (7) 13 L t(quenching range) L a L (8.1) (3) φ62 φ φ15 E.5 E M φ12 h6 Reference no. Screw shaft Basic load ratings (N) Stroke Nut Lead Screw shaft dimensions dia. length Dynamic Static Max. Nominal d C a C a L t -L L L t L a L PSS25N1D PSS25N1D PSS25N1D PSS25N1D PSS25N1D PSS25N1D PSS25N1D PSS25N1D PSS21N1D PSS21N1D PSS21N1D PSS21N1D PSS21N1D PSS21N1D PSS21N1D PSS21N1D PSS21N1D Notes 1. Indicates ball screw preload control value. pproximately 2. N cm of torque is added due to thin plastic seals. 2. Contact NSK if permissible rotational speed is to be exceeded. 2 Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com -

21 PSS Type for eneral Use φ6.6 drill thru φ11 c'bore 6.5 depth Preload type Ball screw specification Oversize ball (P-preload) Ball dia./screw shaft root dia / 17.2 PCD 49 Ball circle dia. 2.5 ccuracy grade/axial play C5 / Factory-packed grease NSK grease LR3 rease fitting (oil hole, M5.8 tap) 3 19 Plug (oil hole, M5.8 tap) Cross-section Recommended support unit For drive side (Fixed) (Fixed) For opposite to drive side (Simple) WBK15-1B (square, low) P WBK15-1B (square, low) P WBK15S-1B (square, low) P 5 WBK15-11 (round) P WBK15-11 (round) P Left shaft end (opposite driven side) Lead accuracy Shaft run-out Dynamic preload torque Target value Error Variation Mass Permissible rotational speed (min -1 ) *2 Internal spatial volume of nut Standard volume of grease replenishing T e p V u C (N cm) *1 (kg) Fixed-simple Fixed-Fixed (cm 3 ) (cm 3 ) to to to II to _ to to to I to to to II to to _ to to to I to to Service temperature range is to 8ºC. 4. Use of NSK support unit is recommended. Refer to pages 46 to 51 for details. Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com

22 Compact F Series Screw shaft diameter 2 mm, Lead 2 and 3 mm Shape II φ φ L thin plastic seal (synthetic plastic) C E M15 1. Shape I 15 F φ15 F -.11 φ F 4 φ φ φ36 g6.11 L 6(8.7) (7) 13 L t(quenching range) L a L (8.1) (3) φ62 φ L φ15 E.5 E M φ12 h6 Reference no. Screw shaft Basic load ratings (N) Stroke Nut Lead Screw shaft dimensions dia. length Dynamic Static Max. Nominal d C a C a L t -L L L t L a L L 1 PSS22N1D PSS22N1D PSS22N1D PSS22N1D PSS22N1D PSS22N1D PSS22N1D PSS22N1D PSS22N1D PSS23N1D PSS23N1D PSS23N1D PSS23N1D PSS23N1D PSS23N1D PSS23N1D PSS23N1D PSS23N1D Notes 1. Indicates ball screw preload control value. pproximately 2. N cm of torque is added due to thin plastic seals. 2. Contact NSK if permissible rotational speed is to be exceeded. 22 Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com -

23 PSS Type for eneral Use Ball screw specification φ6.6 drill thru φ11 c'bore 6.5 depth Preload type Oversize ball (P-preload) Ball dia./screw shaft root dia / 17.2 PCD 49 Ball circle dia. 2.5 ccuracy grade/axial play C5 / Factory-packed grease NSK grease LR Recommended support unit rease fitting (oil hole, M5.8 tap) 19 Plug (oil hole, M5.8 tap) For drive side (Fixed) (Fixed) For opposite to drive side (Simple) WBK15-1B (square, low) P WBK15-1B (square, low) P WBK15S-1B (square, low) P 5-51 WBK15-11 (round) P WBK15-11 (round) P Cross-section - Left shaft end (opposite driven side) Lead accuracy Shaft run-out Dynamic preload torque Target value Error Variation Mass Permissible rotational speed (min -1 ) *2 Internal spatial volume of nut Standard volume of grease replenishing T e p V u C (N cm) *1 (kg) Fixed-simple Fixed-Fixed (cm 3 ) (cm 3 ) to II to to _ to to to I to to to to to II to to _ to to to I to to Service temperature range is to 8ºC. 4. Use of NSK support unit is recommended. Refer to pages 46 to 51 for details. Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com

24 Compact F Series Screw shaft diameter 2 mm, Lead 4 and 6 mm Shape II φ φ L thin plastic seal (synthetic plastic) C E M15 1. Shape I 15 F φ15 F -.11 φ F 4 φ φ φ36 g6.11 L 6(8.7) (7) 13 L t(quenching range) L a L (8.1) (3) φ62 φ L φ15 E.5 E M φ12 h6 Reference no. Screw shaft Basic load ratings (N) Stroke Nut Lead Screw shaft dimensions dia. length Dynamic Static Max. Nominal d C a C a L t -L L L t L a L L 1 PSS24N1D PSS24N1D PSS24N1D PSS24N1D PSS24N1D PSS24N1D PSS24N1D PSS24N1D PSS24N1D PSS26N1D PSS26N1D PSS26N1D PSS26N1D PSS26N1D PSS26N1D PSS26N1D PSS26N1D PSS26N1D Notes 1. Indicates ball screw preload control value. pproximately 2. N cm of torque is added due to thin plastic seals. 2. Contact NSK if permissible rotational speed is to be exceeded. 24 Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com -

25 PSS Type for eneral Use φ6.6 drill thru φ11 c'bore 6.5 depth Ball screw specification Preload type Oversize ball (P-preload) Ball dia./screw shaft root dia / 17.2 PCD 49 Ball circle dia. 2.5 ccuracy grade/axial play C5 / Factory-packed grease NSK grease LR3 rease fitting (oil hole, M5.8 tap) 3 19 Plug (oil hole, M5.8 tap) Cross-section Recommended support unit For drive side (Fixed) (Fixed) For opposite to drive side (Simple) WBK15-1B (square, low) P WBK15-1B (square, low) P WBK15S-1B (square, low) P 5 WBK15-11 (round) P WBK15-11 (round) P Left shaft end (opposite driven side) Lead accuracy Shaft run-out Dynamic preload torque Target value Error Variation Mass Permissible rotational speed (min -1 ) *2 Internal spatial volume of nut Standard volume of grease replenishing T e p V u C (N cm) *1 (kg) Fixed-simple Fixed-Fixed (cm 3 ) (cm 3 ) to II to to _ to to to I to to II to to to _ to to to to I to to to Service temperature range is to 8ºC. 4. Use of NSK support unit is recommended. Refer to pages 46 to 51 for details. Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com

26 Compact F Series Screw shaft diameter 25 mm, Lead 5 and 1 mm φ19 L C E Shape II Shape I M φ2 16 F φ2 F -.21 φ F φ φ4 g6 2-thin plastic seal (synthetic plastic).11 L 6 (7) 12 L t(quenching range) L a (8.7) (3) (8.1) φ62 φ φ2 E.5 E M φ15 h6 L Reference no. Screw shaft Basic load ratings (N) Stroke Nut Lead Screw shaft dimensions dia. length Dynamic Static Max. Nominal d C a C a L t -L L L t L a L PSS255N1D PSS255N1D PSS255N1D PSS255N1D PSS255N1D PSS255N1D PSS255N1D PSS255N1D PSS251N1D PSS251N1D PSS251N1D PSS251N1D PSS251N1D PSS251N1D PSS251N1D PSS251N1D Notes 1. Indicates ball screw preload control value. pproximately 2. N cm of torque is added due to thin plastic seals. 2. Contact NSK if permissible rotational speed is to be exceeded. 26 Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com -

27 PSS Type for eneral Use φ6.6 drill thru Ball screw specification Preload type Oversize ball (P-preload) Ball dia./screw shaft root dia / rease fitting (oil hole, M5.8 tap) Plug (oil hole, M5.8 tap) PCD 51 PCD 47 Ball circle dia ccuracy grade/axial play C5 / Factory-packed grease Recommended support unit For drive side (Fixed) (Fixed) For opposite to drive side NSK grease LR3 (Simple) Cross-section - WBK2-1 (square) P WBK2-1 (square) P WBK2S-1 (square) P 5 WBK2-11 (round) P WBK2-11 (round) P Left shaft end (opposite driven side) Lead accuracy Shaft run-out Dynamic preload torque Target value Error Variation Mass Permissible rotational speed (min -1 ) *2 Internal spatial volume of nut Standard volume of grease replenishing T e p V u C (N cm) *1 (kg) Fixed-simple Fixed-Fixed (cm 3 ) (cm 3 ) to to to II to _ to to to I to to to II to to to to I to to Service temperature range is to 8ºC. 4. Use of NSK support unit is recommended. Refer to pages 46 to 51 for details. Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com

28 Compact F Series Screw shaft diameter 25 mm, Lead 2 and 25 mm φ19 L C E Shape II Shape I M φ2 16 F φ2 F -.21 φ F φ φ4 g6 2-thin plastic seal (synthetic plastic).11 L 6 (7) 12 L t(quenching range) L a (8.7) (3) (8.1) φ62 φ L φ2 E.5 E M φ15 h6 L Reference no. Screw shaft Basic load ratings (N) Stroke Nut Lead Screw shaft dimensions dia. length Dynamic Static Max. Nominal d C a C a L t -L L L t L a L L 1 PSS252N1D PSS252N1D PSS252N1D PSS252N1D PSS252N1D PSS252N1D PSS252N1D PSS252N1D PSS2525N1D PSS2525N1D PSS2525N1D PSS2525N1D PSS2525N1D PSS2525N1D PSS2525N1D PSS2525N1D Notes 1. Indicates ball screw preload control value. pproximately 2. N cm of torque is added due to thin plastic seals. 2. Contact NSK if permissible rotational speed is to be exceeded. 28 Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com -

29 PSS Type for eneral Use Ball screw specification φ6.6 drill thru Preload type Oversize ball (P-preload) Ball dia./screw shaft root dia / 22.2 Ball circle dia PCD 51 PCD 47 ccuracy grade/axial play C5 / Factory-packed grease NSK grease LR3 rease fitting (oil hole, M5.8 tap) Plug (oil hole, M5.8 tap) Cross-section - Recommended support unit For drive side (Fixed) (Fixed) For opposite to drive side (Simple) WBK2-1 (square) P WBK2-1 (square) P WBK2S-1 (square) P 5 WBK2-11 (round) P WBK2-11 (round) P Left shaft end (opposite driven side) Lead accuracy Shaft run-out Dynamic preload torque Target value Error Variation Mass Permissible rotational speed (min -1 ) *2 Internal spatial volume of nut Standard volume of grease replenishing T e p V u C (N cm) *1 (kg) Fixed-simple Fixed-Fixed (cm 3 ) (cm 3 ) II I II I to to _ to to to to to to to to _ to to to to to to Service temperature range is to 8ºC. 4. Use of NSK support unit is recommended. Refer to pages 46 to 51 for details. Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com

30 Compact F Series Screw shaft diameter 25 mm, Lead 3 and 5 mm φ19 L C E Shape II Shape I M φ2 16 F φ2 F -.21 φ F φ φ4 g6 2-thin plastic seal (synthetic plastic).11 L 6 (7) 12 L t(quenching range) L a (8.7) (3) (8.1) φ62 φ L φ2 E.5 E M φ15 h6 L Reference no. Screw shaft Basic load ratings (N) Stroke Nut Lead Screw shaft dimensions dia. length Dynamic Static Max. Nominal d C a C a L t -L L L t L a L L 1 PSS253N1D PSS253N1D PSS253N1D PSS253N1D PSS253N1D PSS253N1D PSS253N1D PSS253N1D PSS255N1D PSS255N1D PSS255N1D PSS255N1D PSS255N1D PSS255N1D PSS255N1D PSS255N1D Notes 1. Indicates ball screw preload control value. pproximately 2. N cm of torque is added due to thin plastic seals. 2. Contact NSK if permissible rotational speed is to be exceeded. 3 Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com -

31 PSS Type for eneral Use φ6.6 drill thru Preload type Ball screw specification Oversize ball (P-preload) Ball dia./screw shaft root dia / PCD 51 PCD 47 Ball circle dia ccuracy grade/axial play C5 / rease fitting (oil hole, M5.8 tap) Plug (oil hole, M5.8 tap) Cross-section - Factory-packed grease Recommended support unit For drive side (Fixed) (Fixed) For opposite to drive side NSK grease LR3 (Simple) WBK2-1 (square) P WBK2-1 (square) P WBK2S-1 (square) P 5 WBK2-11 (round) P WBK2-11 (round) P Left shaft end (opposite driven side) Lead accuracy Shaft run-out Dynamic preload torque Target value Error Variation Mass Permissible rotational speed (min -1 ) *2 Internal spatial volume of nut Standard volume of grease replenishing T e p V u C (N cm) *1 (kg) Fixed-simple Fixed-Fixed (cm 3 ) (cm 3 ) II to to to _ to to I to to to to II to to _ to to I to to to Service temperature range is to 8ºC. 4. Use of NSK support unit is recommended. Refer to pages 46 to 51 for details. Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com

32 Compact F Series Screw shaft diameter 1 mm, Lead 5 mm -.6 φ φ23g6 2-thin plastic seal (synthetic plastic) C φ M φ6 -.8 φ6 h6.8 E φ1 φ φ8 F F (8.7) (8.1) (3) (7) L t(quenching range) 5 L a 4 (8) 9 E.3 E L Reference no. Screw shaft Basic load ratings (N) Stroke Lead dia. Screw shaft dimensions Dynamic Static Max. d C a C a Nominal L t -L L t L a L USS15N1D USS15N1D USS15N1D Notes 1. Indicates ball screw preload control value. pproximately.5 N cm of torque is added due to thin plastic seals. 2. Contact NSK if permissible rotational speed is to be exceeded. 32 Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com -

33 USS Type for High-ccuracy and Clean Room Use 4-φ4.5 drill thru φ8 c'bore 4.5 depth 3 3 Shaft dia. Ball screw specification Ø1 Preload type Oversize ball (P-preload) PCD 33 Ball dia./screw shaft root dia. 2. / 8.2 Ball circle dia. 1.3 ccuracy grade/axial play C3 / Factory-packed grease NSK clean grease L2 rease fitting (oil hole, M5.8 tap) Plug (oil hole, M5.8 tap) Cross-section - Recommended support unit For drive side (Fixed) For opposite to drive side (Simple) WBK8-1B (square, low) P WBK8S-1B (square, low) P 5 WBK8-11 (round) P WBK8S-1C (square, clean) P 5 WBK8-1C (square, clean) P WBK8-11C (round, clean) P Lead accuracy Shaft run-out Dynamic preload torque Target value Error Variation Mass Permissible rotational speed (min -1 ) *2 Internal spatial volume of nut Standard volume of grease replenishing T e p V u C (N cm) *1 (kg) Fixed-simple (cm 3 ) (cm 3 ) to to to Service temperature range is to 8ºC. 4. Use of NSK support unit is recommended. Refer to pages 46 to 5 for details. Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com

34 Compact F Series Screw shaft diameter 12 mm, Lead 5 mm thin plastic seal (synthetic plastic) C E.6 φ5.7 φ φ8 M φ6 φ φ24g6 φ44 φ6h6 F E 9 (8.1).3 F (8.7) (7) 11 3 L t (quenching range) L a (3) E L Reference no. Screw shaft Basic load ratings (N) Stroke Lead dia. Screw shaft dimensions Dynamic Static Max. d C a C a Nominal L t -L L t L a L USS125N1D USS125N1D USS125N1D Notes 1. Indicates ball screw preload control value. pproximately.5 N cm of torque is added due to thin plastic seals. 2. Contact NSK if permissible rotational speed is to be exceeded. 34 Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com -

35 USS Type for High-ccuracy and Clean Room Use φ4.5 drill thru φ8 c'bore 4.5 depth Shaft dia. Ball screw specification Ø12 PCD 34 Preload type Oversize ball (P-preload) Ball dia./screw shaft root dia. 2. / 1.2 Ball circle dia ccuracy grade/axial play C3 / Factory-packed grease NSK clean grease L2 rease fitting (oil hole, M5.8 tap) 3 Plug (oil hole, M5.8 tap) Cross-section - Recommended support unit For drive side (Fixed) For opposite to drive side (Simple) WBK8-1B (square, low) P WBK8S-1B (square, low) P 5 WBK8-11 (round) P WBK8S-1C (square, clean) P 5 WBK8-1C (square, clean) P WBK8-11C (round, clean) P Permissible Lead accuracy Shaft run-out Dynamic rotational speed Internal spatial Standard volume of Mass preload torque (min -1 ) *2 volume of nut grease replenishing Target value Error Variation T e p V u C (N cm) *1 (kg) Fixed-simple (cm 3 ) (cm 3 ) to to to Service temperature range is to 8ºC. 4. Use of NSK support unit is recommended. Refer to pages 46 to 5 for details. Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com

36 E.9 φ M φ1 φ φ12 φ51 Compact F Series Screw shaft diameter 15 mm, Lead 5 mm 2-thin plastic seal (synthetic plastic) C φ φ28g6.9 φ1h6 F (8.1) E.3 F (8.7) (7) 11 (3) E ( L t (quenching range) L a 45 L Reference no. Screw shaft Basic load ratings (N) Stroke Lead dia. Screw shaft dimensions Dynamic Static Max. d C a C a Nominal L t -L L t L a L USS155N1D USS155N1D USS155N1D USS155N1D Notes 1. Indicates ball screw preload control value. pproximately.5 N cm of torque is added due to thin plastic seals. 2. Contact NSK if permissible rotational speed is to be exceeded. 36 Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com -

37 USS Type for High-ccuracy and Clean Room Use φ5.5 drill thru φ9.5 c'bore 5.5 depth Shaft dia. Ball screw specification Ø15 PCD 39 Preload type Oversize ball (P-preload) Ball dia./screw shaft root dia / 12.6 Ball circle dia ccuracy grade/axial play C3 / Factory-packed grease NSK clean grease L2 rease fitting (oil hole, M5.8 tap) Plug (oil hole, M5.8 tap) Cross-section - Recommended support unit For drive side (Fixed) For opposite to drive side (Simple) WBK12-1B (square, low) P WBK12S-1B (square, low) P 5 WBK12-11 (round) P WBK12S-1C (square, clean) P 5 WBK12-1C (square, clean) P WBK12-11C (round, clean) P Permissible Lead accuracy Shaft run-out Dynamic rotational speed Internal spatial Standard volume of Mass preload torque (min -1 ) *2 volume of nut grease replenishing Target value Error Variation T e p V u C (N cm) *1 (kg) Fixed-simple (cm 3 ) (cm 3 ) to to to to Service temperature range is to 8ºC. 4. Use of NSK support unit is recommended. Refer to pages 46 to 5 for details. Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com

38 Compact F Series Screw shaft diameter 12 mm, Lead 1 mm.2 2-thin plastic seal (synthetic plastic) C.25 M E φ12g φ24g6 φ 44 (8.1) φ8 φ φ6h6 6 4 E (7) 11 (8.7) L t (quenching range) L a (3) E L Reference no. Screw shaft dia. Lead Dynamic Basic load ratings (N) Static Screw shaft dimensions d C a C a L t L a L FSS121N1D FSS121N1D FSS121N1D Notes 1. pproximately 2. N cm of torque is added due to thin plastic seals. 2. Permisslbe rotational speed varies when using cut screws shaft. It is necessary to calculate two items below, and whichever is smaller is the permissible rotational speed. * Critical speed which is the resonance vibration of the shaft. * Maximum rotational speed 5 min Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com -

39 FSS Type for Transfer Equipment φ4.5 drill thru φ8 c'bore 4.5 depth Ball screw specification Ball dia./screw shaft root dia. 2. / 1.2 Ball circle dia PC D 34 ccuracy grade/axial play Factory-packed grease Ct7 /.1 or less NSK grease LR Recommended support unit For drive side (Fixed) For opposite to drive side (Simple) rease fitting (oil hole, M5.8 tap) WBK8-1B (square, low) P WBK12SF-1B (square, low) P 51 Plug (oil hole, M5.8 tap) Cross-section - Lead accuracy Target value Error Variation Shaft run-out Mass Internal spatial volume of nut Standard volume of grease replenishing T e p V u C (kg) (cm 3 ) (cm 3 ) Service temperature range is to 8ºC. 4. Use of NSK support unit is recommended. Refer to pages 46 to 51 for details. Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com

40 Compact F Series Screw shaft diameter 15 mm, Lead 1 and 2 mm.2 2-thin plastic seal (synthetic plastic) C E M φ15g φd1g6 φd2 φ φ φ1h6 8 5 E (7) 11 L L t (quenching range) L a (3) (8.1) (8.7) L 1. 6 E L Reference no. Screw shaft dia. Lead Dynamic Basic load ratings (N) Static Screw shaft dimensions d C a C a L t L a L L 1 FSS151N1D FSS151N1D FSS151N1D FSS152N1D FSS152N1D FSS152N1D Notes 1. pproximately 2. N cm of torque is added due to thin plastic seals. 2. Permisslbe rotational speed varies when using cut screws shaft. It is necessary to calculate two items below, and whichever is smaller is the permissible rotational speed. * Critical speed which is the resonance vibration of the shaft. * Maximum rotational speed 5 min Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com -

41 FSS Type for Transfer Equipment φ5.5 drill thru φ9.5 c'bore 5.5 depth Ball screw specification Lead 1 2 Ball dia./screw shaft root dia / / 12.2 PC D W Ball circle dia ccuracy grade/axial play Ct7 /.1 or less Factory-packed grease NSK grease LR3 rease fitting (oil hole, M5.8 tap) B E Recommended support unit For drive side (Fixed) For opposite to drive side (Simple) WBK12-1B (square, low) P WBK15SF-1B (square, low) P 51 Plug (oil hole, M5.8 tap) 3 C 3 Cross-section - Nut dimensions Lead accuracy Target value Error Variation Shaft run-out Mass Internal spatial volume of nut Standard volume of grease replenishing L D 1 D 2 W B C E T e p V u C (kg) (cm 3 ) (cm 3 ) Service temperature range is to 8ºC. 4. Use of NSK support unit is recommended. Refer to pages 46 to 51 for details. Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com

42 Compact F Series Screw shaft diameter 2 mm, Lead 1 and 2 mm.25 2-thin plastic seal (synthetic plastic) -.25 C E M φ12h φ2g φ36g6 φ 62 φ φ E (7) 13 L L t (quenching range) L a (3) (8.1) (8.7) E L Reference no. Screw shaft dia. Lead Dynamic Basic load ratings (N) Static Screw shaft dimensions d C a C a L t L a L FSS21N1D FSS21N1D FSS21N1D FSS22N1D FSS22N1D FSS22N1D Notes 1. pproximately 2. N cm of torque is added due to thin plastic seals. 2. Permisslbe rotational speed varies when using cut screws shaft. It is necessary to calculate two items below, and whichever is smaller is the permissible rotational speed. * Critical speed which is the resonance vibration of the shaft. * Maximum rotational speed 5 min Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com -

43 FSS Type for Transfer Equipment φ6.6 drill thru φ11 c'bore 6.5 depth Ball screw specification Ball dia./screw shaft root dia / 17.2 PC D 49 Ball circle dia. 2.5 ccuracy grade/axial play Ct7 /.1 or less Factory-packed grease NSK grease LR Recommended support unit rease fitting (oil hole, M5.8 tap) Plug (oil hole, M5.8 tap) For drive side (Fixed) For opposite to drive side (Simple) WBK15-1B (square, low) P WBK2SF-1B (square, low) P 51 Cross-section - Nut length Lead accuracy Target value Error Variation Shaft run-out Mass Internal spatial volume of nut Standard volume of grease replenishing L T e p V u C (kg) (cm 3 ) (cm 3 ) Service temperature range is to 8ºC. 4. Use of NSK support unit is recommended. Refer to pages 46 to 51 for details. Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com

44 Compact F Series Screw shaft diameter 25 mm, Lead 1, 2 and 25 mm.25 2-thin plastic seal (synthetic plastic) -.35 C 22.3 M E φ25g φ4g φ φ15h6 62 φ φ (7) (3) (8.1) 12 (8.7) L Lt (quenching range) La 12 1 L1 16 E. 6 E Lo Reference no. Screw shaft dia. Lead Dynamic Basic load ratings (N) Static Screw shaft dimensions d C a C a L t L a L L 1 FSS251N1D FSS251N1D FSS251N1D FSS252N1D FSS252N1D FSS252N1D FSS2525N1D FSS2525N1D FSS2525N1D Notes 1. pproximately 2. N cm of torque is added due to thin plastic seals. 2. Permisslbe rotational speed varies when using cut screws shaft. It is necessary to calculate two items below, and whichever is smaller is the permissible rotational speed. * Critical speed which is the resonance vibration of the shaft. * Maximum rotational speed 5 min Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com -

45 FSS Type for Transfer Equipment φ6.6 drill thru (PCD 51) Ball screw specification Ball dia./screw shaft root dia / PC D 51 Ball circle dia ccuracy grade/axial play Ct7 /.1 or less Factory-packed grease NSK grease LR3 rease fitting (oil hole, M5.8 tap) Plug (oil hole, M5.8 tap) Cross-section - Recommended support unit For drive side (Fixed) For opposite to drive side (Simple) WBK2-1 (square) P WBK25SF-1 (square) P 51 Nut length Lead accuracy Target value Error Variation Shaft run-out Mass Internal spatial volume of nut Standard volume of grease replenishing L T e p V u C (kg) (cm 3 ) (cm 3 ) Service temperature range is to 8ºC. 4. Use of NSK support unit is recommended. Refer to pages 46 to 51 for details. Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com

46 Support Units Fixed support side support unit (square type) WBK4 and 6 Set screw Brass pad S d1 M K J N WBK8 to 2 E F Retaining cover Set screw S E F B Brass pad Retaining cover Set screw φd1 S C -.5 D Brass pad M B φd1 W W C -.5 D K J Reference no. Use d 1 B C D E F L J K R T U N M K J L L N N WBK4-1M eneral WBK6-1M eneral WBK8-1 eneral WBK8-1B Low type WBK8-1C Clean WBK1-1 eneral WBK1-1B Low type WBK1-1C Clean WBK12-1 eneral WBK12-1B Low type WBK12-1C Clean WBK15-1 eneral WBK15-1B Low type WBK15-1C Clean WBK2-1 eneral Notes Use datum surface for mounting to machine base. 2. Tighten set screw after locknut has been adjusted and tightened. 3. Insert brass pad provided with unit into locknut set screw hole, then insert and tighten the set screw. Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com -

47 Square Type T U Reference no. Tightening torque (reference) [N cm] Locknut Set screw WBK4-** 1 69 (M3) WBK6-** (M3) WBK8-** (M3) 2-φ drill thru H View S (WBK4 and 6) WBK1-** (M4) WBK12-** (M4) WBK15-** (M4) WBK2-** (M4) 2-φ drill thru φy c'bore Z depth H 4-φ drill thru φy c'bore Z depth Q P Q View S (WBK8 to 15) Counterbore dimensions H P Q W Y Z Mass (kg) Basic dynamic load rating Specification xial Direction Load limit View S (WBK2) Rigidity Maximum starting torque 4. Deep groove ball bearing and snap ring are also provided for simple support side. (except WBK4-1M, WBK6-1M). 5. For retaining cover side of WBK8-1 and WBK8-1C, there are no seals. 6. For WBK4-1M and WBK6-1M, non-contact metal seals are installed in both sides of bearings. Locknut screw C a (N) N (N/mm) (N cm) M ttached bearing for support side M M M ZZ VV M ZZ VV M ZZ VV M ZZ VV M ZZ Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com

48 Support Units Fixed support side support unit (round type) WBK4 and 6 2-φ drill thru 2-φ drill thru PCD W PCD W Set screw Brass pad Set screw Brass pad L K L K φd2 φd2 d1 d1 φc U φc φc WBK8 to 2 45 U U φc φc U U 4-φ drill thru L φy c'bore, Z depth Retaining cover PCD W Set screw 4-φ 切り通し後 L 4-φ 切り通し後 Brass pad φy 座ぐり深さ Z 押えぶた φy 座ぐり深さ Z 押えぶた固定止めねじ PCD W 固定止めねじ PCD W セットピースセットピース Retaining cover M Retaining cover H F E Cross section - (Example 1) M M J H / 2 / 2 F E View - (Example J1) H J H / 2 / 2 F E / 2 / 2 F E Reference no. Use d 1 C D 1 D 2 E H L K F N U P Q F J φd1 φd1 K K J φd1 E L H K WBK4-11M eneral WBK6-11M eneral WBK8-11B High-load WBK8-11 eneral WBK8-11C Clean WBK1-11 eneral WBK1-11C Clean WBK12-11 eneral WBK12-11C Clean WBK15-11 eneral WBK15-11C Clean WBK2-11 eneral Notes Tighten set screw after locknut has been adjusted and tightened. 2. Insert brass pad provided with unit into locknut set screw hole, then insert and tighten the set screw. Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com -

49 Round Type Set screw Brass pad Q P Reference no. Tightening torque (reference) [N cm] Locknut Set screw WBK4-** 1 69 (M3) WBK6-** (M3) WBK8-** (M3) WBK1-** (M4) N H J WBK12-** (M4) WBK15-** (M4) WBK2-** (M4) Set screw Q P Retaining cover Brass pad φd1g6 φd1 φd1g6 d1 Cross section - (Example 2) N H J View - (Example 2) Counterbore dimensions J W Y Z Mass (kg) Basic dynamic load rating Specification xial Direction Load limit Rigidity Maximum starting torque Locknut screw C a (N) N (N/mm) (N cm) M ttached bearing for support side M M ZZ M ZZ VV ZZ M VV ZZ M VV ZZ M VV M ZZ 3. Deep groove ball bearing and snap ring are also provided for simple support side. (except WBK4-11M and WBK6-11M) 4. For retaining cover side of WBK8-11 and WBK8-11C, there are no seals. 5. For WBK4-11M and WBK6-11M, non-contact metal seals are installed in both sides of bearings. Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com

50 Support Units for Simple Support Side Simple support side support unit for PSS and USS types 2-φ drill thru φy c'bore Z depth W C -.5 B φd2 φd1 R/2 R/2 R Reference no. Counterbore dimensions Use d 2 B C R W Y Z Mass (kg) Bearing reference no. Radal direction basic dynamic load rating (N) WBK8S-1B Low ZZ 2 26 WBK12S-1B Low ZZ 4 55 WBK15S-1B Low ZZ 5 6 Note 1. Use datum surface for mounting to machine base. E 2-φ drill thru φy c'bore Z depth C -.5 D B φd2 φd1 Note W 1. Use datum surface for mounting to machine base. R/2 R/2 R Reference no. Use d 2 B C D E R Counterbore dimensions W Y Z Mass (kg) Bearing reference no. Radal direction basic dynamic load rating (N) WBK8S-1 eneral 66ZZ WBK8S-1C Clean 66VV 2 26 WBK1S-1 eneral 68ZZ WBK1S-1C Clean 68VV 3 3 WBK12S-1 eneral 6ZZ WBK12S-1C Clean 6VV 4 55 WBK15S-1 eneral 62ZZ WBK15S-1C Clean 62VV 5 6 WBK2S-1 eneral ZZ Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com -

51 Square Type Simple support side support unit for FSS types 2-φ drill thru φy c'bore Z depth W C -.5 B φd Reference no. d B C R Counterbore dimensions R / 2 W Y Z R Mass (kg) Bearing reference no. Radial direction basic dynamic load rating (N) WBK12SF-1B ZZ 1 92 WBK15SF-1B ZZ 4 35 WBK2SF-1B ZZ 4 Note 1. Use datum surface for mounting to machine base. 2-φ drill thru φy c'bore Z depth W E C -.5 D B φd R / 2 R Reference no. d B C D E R Counterbore dimensions W Y Z Mass (kg) Bearing reference no. Radial direction basic dynamic load rating (N) WBK25SF ZZ 1 1 Note 1. Use datum surface for mounting to machine base. Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com

52 Worldwide Sales Offices NSK Ltd. Headquarters, Tokyo, Japan sia Business Strategic Division - Headquarters tel: Industrial Machinery Bearings Division - Headquarters tel: utomotive Division - Headquarters tel: Needle Roller Bearings Strategic tel: Division - Headquarters Precision Machinery & Parts tel: Division - Headquarters frica South frica: NSK South frica (Pty) Ltd. Johannesburg tel: sia and Oceania ustralia: NSK ustralia Pty. Ltd. Melbourne tel: China: NSK Hong Kong Ltd. Hong Kong tel: Kunshan NSK Co., Ltd. Kunshan Plant tel: Changshu NSK Needle Bearing Co., Ltd. Jiangsu Plant tel: uizhou HS NSK Bearings Co., Ltd. nshun Plant tel: NSK Steering Systems Dongguan Co., Ltd. Dongguan Plant tel: Zhangjiagang NSK Precision Machinery Co., Ltd. Jiangsu Plant tel: Timken-NSK Bearings (Suzhou) Co., Ltd. Jiangsu Plant tel: NSK China Technology Center Jiangsu tel: NSK (Shanghai) Trading Co., Ltd. Shanghai tel: Beijing tel: uangzhou tel: nshun tel: Chengdu tel: Shenzhen tel: Changchun tel: NSK (China) Investment Co., Ltd. Shanghai tel: India: Rane NSK Steering Systems Ltd. Chennai tel: NSK Ltd. India Branch Office Chennai tel: Indonesia: PT. NSK Bearings Manufacturing Indonesia Jakarta tel: PT. NSK Indonesia Jakarta tel: Korea: NSK Korea Co., Ltd. Seoul tel: Changwon Plant tel: Malaysia: NSK Bearings (Malaysia) Sdn. Bhd. Kuala Lumpur tel: NSK Micro Precision (M) Sdn. Bhd. Malaysia Plant tel: New Zealand: NSK New Zealand Ltd. uckland tel: Philippines: NSK Representative Office Makati City tel: Singapore: NSK International (Singapore) Pte Ltd. Singapore tel: NSK Singapore (Pte) Ltd. Singapore tel: Taiwan: Taiwan NSK Precision Co., Ltd. Taipei tel: Thailand: NSK Bearings (Thailand) Co., Ltd. Bangkok tel: SIM NSK Steering Systems Co., Ltd. Chachoengsao tel: ~35 NSK sia Pacific Technology Center (Thailand) Co., Ltd. Chonburi tel: ~ Vietnam: NSK Representative Office Hanoi tel: Europe NSK Europe Ltd. (European Headquarters) Maidenhead, U.K. tel: France: NSK France S..S Paris tel: ermany: NSK Deutschland mbh Düsseldorf tel: NSK Steering Systems Europe Ltd. Stuttgart tel: Neuweg Fertigung mbh Munderkingen tel: Italy: NSK Italia S.p.. Milano tel: Industria Cuscinetti S.p.. Torino Plant tel: Netherlands: NSK European Distribution Centre B.V. Tilburg tel: Poland: NSK Polska Sp. z.o.o. Warsaw Branch tel: NSK Iskra S.. Kielce tel: NSK European Technology Center, Poland Office Kielce tel: Spain: NSK Spain S.. Barcelona tel: Turkey: NSK Rulmanlari Orta Dogu Tic. Ltd Sti tel: United Kingdom: NSK Bearings Europe Ltd. Peterlee Plant tel: NSK European Technology Centre Newark tel: NSK UK Ltd. Newark tel: NSK Steering Systems Europe Ltd. Coventry tel: North and South merica NSK mericas, Inc. (merican Headquarters) nn rbor, Michigan tel: rgentina: NSK rgentina SRL Buenos ires tel: Brazil: NSK Brasil Ltda. São Paulo tel: Canada: NSK Canada Inc. Toronto tel: Mexico: NSK Rodamientos Mexicana, S.. de C.V. Mexico City tel: United States of merica: NSK Corporation nn rbor, Michigan tel: NSK merican Technology Center nn rbor, Michigan tel: NSK Precision merica, Inc. Franklin, Indiana tel: NSK Steering Systems merica, Inc. Bennington, Vermont tel: NSK Latin merica, Inc. Miami, Florida tel: NSK Ltd. has a basic policy not to export any products or technology designated as controlled items by export-related laws. When exporting the products in this brochure, the laws of the exporting country must be observed. Specifications are subject to change without notice and without any obligation on the part of the manufacturer. Every care has been taken to ensure the accuracy of the data contained in this brochure, but no liability can be accepted for any loss or damage suffered through errors or omissions. We will gratefully acknowledge any additions or corrections. Compact F - Rev 9/B/1M15. Printed in the US NSK 215. The contents of this publication are the copyright of the publishers. Courtesy of Steven Engineering, Inc. - (8) sales@steveneng.com -