NSK Standard Ball s ompact Series ompact-nut ball screws with increased speed and low noise for NSK standard. They accommodate a variety of uses, from use in semiconductor equipment to various transfer equipment. xtended series
NSK Standard Ball s ompact Series eatures ompact Series has a broad lineup to meet various industrial needs. ow noise and space-compact design is achieved. The compact series of ball screws includes the following types to quickly and easily meet your requirements: - PSS Type which offers various sizes for general use. - USS Type for high accuracy and clean environment use. - SS Type for transfer equipment. Quick delivery Ball screws and support units in the catalog are in stock. IN UP Selection of ball screws Three types of compact Series are available. hoose optimal types for application. NSK Standard Ball s ompact PSS Type for general uses ccuracy grade: 5 grade of JIS xial play: shaft and 8 mm;.5 mm or less shaft mm or over; Page 3, 7 to 3 ompact The outside diameter of the ball nut is as much as 3% smaller than those of existing NSK products, and the low-profile support units especially compatible with the compact series are available. These contribute to more compact design of equipment and devices. 25 mm, lead 5 mm xisting Series ompact Series ompact USS Type for high-accuracy and clean environments ccuracy grade: 3 grade of JIS xial play: ompact SS type for transfer equipment ccuracy grade: t7 grade of JIS xial play:. mm or less Page 4, 31 to 3 Page 5, 37 to 44 omparison of existing Series and ompact Series 13 mm more compact (shaft 2, lead ) High-speed, low-noise Used with the end-deflector recirculation system. Maximum rotational speed of 5 min -1 is achieved, and noise reduced by db compared with the tube recirculation system. The vibration is reduced as well. Noise level db, 8 75 7 5 * Microphone was positioned at a distance of 4 mm for all noise measurements. 5 25 5 shaft ombinations of screw shaft diameter and lead 5 8 2 25 3 4 5 8 2 25 Unit: mm PSS type USS type SS type Thin plastic seal shafts with diameters of to 25 mm are equipped with a thin layer of sealing, which minimizes spattering of grease and helps to achieve a clean environment. * s with shaft diameters of mm or 8 mm are not sealed. rease fitting 55 5 xisting Series ompact Series 5 2 3 4 5 2 eeding speed V, m/min grease fitting (M5.8) is provided as a standard equipment for shaft of to 25 mm. Two lubrication ports are provided to facilitate easy maintenance. Support Unit Shape Square type Round type pplications or general uses or clean uses Space-saving (low-profile type) or general uses or clean uses Page 45 to 5 1 2
ompact Series PSS Type for eneral Uses pplications Semiconductor manufacturing equipment, D manufacturing equipment, material handling equipment, measuring equipment, medical equipment etc. ccuracy grade and axial play ccuracy grade: 5 grade of JIS xial play 1) and 8 mm:.5 mm or less 2) mm or over: (Oversize ball preload) Wide variation bundant combinations of shaft diameter, lead and stroke are available to meet a wide range of customer needs. end support The low-profile support units especially compatible with the compact series are available. Since the ends of ball screw shafts are shaped to accommodate the shapes of support units, no detailed design after purchase is necessary. Support unit ompact Series USS Type for High-ccuracy and lean Uses pplications lean uses for semiconductor manufacturing equipment, D manufacturing equipment, inspection equipment etc. ccuracy grade and axial play ccuracy grade: 3 grade of JIS xial play: (Oversize ball preload) ow-dust emissions Dust particles are reduced by 9% compared with general lithium grease since NSK clean grease 2 is used as a standard. ow-dust emissions (2 rease) 1/ of dust emissions comparing with existing series Ideal for clean environmental use due to superb low-dust feature 8 2 25 ombinations of shaft diameter, lead and stroke Stroke (overall shaft length for shaft and 8 mm) Recommended support unit Page 5 2 3 4 5 7 8 1 1 2 1 2 ixed Simple 8 7 to 8 9 to 5 11 5 2 3 5 2 3 xisting support unit 5 2 3 4 5 2 25 3 5 to 13 to 14 to 18 19 to 24 25 to 3 WBK4-1M (square) WBK4-11M (round) WBK-1M (square) WBK-11M (round) WBK8-1B WBK8-1B WBK-1B WBK-1B WBK-1B WBK2-1 ow-profile support unit - - WBK8S-1B WBK8S-1B WBKS-1B WBKS-1B WBK2S-1 Dust particle amount (.1 μm or larger) [particles/28.3 litle] 1 1 end support ow-profile support unit especially compatible with ompact Series and support unit for clean environments are available. Ball screw 5 Rotational speed 1 min -1 2 3 4 5 7 8 9 Time, h 5 Series (eneral grease) ompact USS type (2 rease) ombinations of screw shaft diameter, lead and stroke Stroke Recommended support unit Page 2 4 5 ixed Simple pplication 31 to 32 33 to 34 35 to 3 Dust particle amount (.5 μm or larger) [particles/28.3 litle] 1 1 Ball screw 5 Rotational speed 1 min -1 Series (eneral grease) ompact USS type (2 rease) 2 3 4 5 7 8 9 Time, h WBK8-1B WBK8S-1B ow WBK8-1 WBK8S-1 lean WBK8-1B WBK8S-1B ow WBK8-1 WBK8S-1 lean WBK-1B WBKS-1B ow WBK-1 WBKS-1 lean Reference number ompact PSS type shaft length (mm) Reference number ompact USS type shaft length (mm) xample PSS 5 N1D 31 xample USS 5 N1D 31 shaft diameter (mm) (mm) NSK control number shaft diameter (mm) (mm) NSK control number 3 4
ompact Series SS Type for Transfer quipment pplications Transfer equipment for abundant industrial fields such as automobile, semiconductor, food and medical equipment. ccuracy grade and axial play ccuracy grade: t7 grade of JIS xial play:. mm or less asy stroke setting lexible stroke setting with fixed-simple support by means of mounting support unit (simple support side) directly onto ball screw thread outside diameter. Since corner cutting is not necessary, it is easy for customers to cut the screws, which contributes to reduction in cost and lead time. If necessary, NSK will accept orders for cutting. Precautions During the cutting process, be careful not to let metal particles or burrs fall inside the nuts. ustomers 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. end support ixed side: Simple side: Reference number ombinations of shaft diameter, lead and shaft length Overall shaft length Recommended support unit Page 4 5 9 1 1 45 ixed Simple 37 to 38 WBK8-1B WBKS-1B 2 25 The low-profile support units especially compatible with the compact PSS type are available. Proprietary support units are available. Design precautions 39 to 4 WBK-1B WBKS-1B 2 41 to 42 2 WBK-1B WBK2S-1B 2 43 to 44 WBK2-1 WBK25S-1 25 ompact SS type asy stroke setting by cutting the shaft end and burring. Permissible rotational speed varies when using cut screw shaft. It is necessary to calculate two items below, and whichever smaller is the permissible rotational speed. ritical speed which is the resonance vibration of the shaft. (Refer to the technical description of the catalog "Precision Machine omponents".) Maximum rotational speed 5 min -1 xample SS N1D shaft length (mm) Design (1) If a ball screw of which left shaft end (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 with NSK for a detailed examination. (2) If using an NSK linear guide, the maximum speed of a linear guide of standard specifications under ordinary conditions is limited to m/min. linear guide with high-speed specifications is available if higher operating speed is required. ontact NSK for further information. (3) or general precautions concerning ball screws, please see NSK atalog No. 312 "Precision Machine omponents." Usage and handling Ball screws are precision products and should be treated as follows: [ubrication] (1) ompact 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 and 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. void mixing different types of grease. heck lubrication (2) ubricant 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) ompact Series ball screws incorporate a new ball re-circulation system. onsequently, only NSK authorized plants should conduct disassembly and reassembly. If the nut accidentally comes off the screw shaft or is dropped, NSK will check precision, problems or perform repairs at your expense. Do not disassemble (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 recirculation parts damaged, resulting in loss of function. This would require the ball screw to be inspected by NSK. If so, be sure to send the ball screw to NSK and we will check it for a fee. Beware of dropping [Usage] (1) Ball screws should be used in a clean environment. The ball screws should be provided 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 Dust control system parts, or cause the table to fall or a similar serious accident. (2) ompact Series ball screws are designed to be used in a service temperature 8 environment of 8 or lower. Do not allow the service temperature limit to be exceeded. Max In some cases, using ball screws in temperatures above 8 might lead to damage of re-circulation system parts or seal parts. ontact NSK if 8 must be exceeded. aution max. temperature ompact Series options Precautions onsult with NSK for information about such as shaft end machining, reverse direction and alternative preload. shaft diameter (mm) (mm) NSK control number 5
ompact Series PSS Type for eneral Uses shaft diameter mm, 8 and mm.5 14 14.4.2.2. 5.4.9 4 M4.5. 3 h 2-3.4drill thru (equally spaced) PD 21 Ball /screw shaft root 1.2 / 4.9 Ball circle.2 ccuracy grade/axial play 5/.5 mm or less actory-packed grease NSK grease PS2 PSS 4 2.5. 4 8.5 t quenching range 1 18 7 23.5 5 7.5 7.5 ross-section or drive side (ixed) WBK4-1M (square) P 45 WBK4-11M shaft ffective turns of balls shaft Basic load ratings (N) accuracy Nut dimensions Stroke length Static max. Target value rror Variation preload Mass Permissible rotational speed d l a a t 1 T e p V u (N cm) (kg) (min -1 ) 1 (cm 3 ) (cm 3 ) PSS8ND 2 55 7 97.5 1 118.5 8.5..2.1 8 PSS8NBD 4 1 18 1 7 89.5 24 118.5 8.5..3.2 2 18.5 or less 5 PSSND 2 55 7 92 2 117..2.1 PSSNBD 4 1 18 1 7 8 32 117.7.3.2 1. ontact NSK if permissible rotational speed is to be exceeded. 2. Service temperature range is to 8º. 3. Use of NSK support unit is recommended. Refer to pages 45 to 48 for details. Internal spatial nut Standard grease replenishing 7 8
ompact Series PSS Type for eneral Uses shaft diameter 8 mm, and mm 8.5 18 18 31.4.2.2.4.9 M.75.8 4.5 h. 2-3.4drill thru (equally spaced) PD 25 Ball /screw shaft root 1.588 /. Ball circle 8.3 ccuracy grade/axial play 5/.5 mm or less actory-packed grease NSK grease PS2 PSS. 4 8 t quenching range 5 3 1.5 22.5 3 7 7.5 9.5 9.5 19 ross-section or drive side (ixed) WBK-1M (square) P 45 WBK-11M shaft Internal Basic load ratings (N) accuracy Permissible ffective Nut dimensions spatial Stroke preload Mass rotational turns length Static max. Target value rror Variation speed of balls nut d l a a t 1 T e p V u (N cm) (kg) (min -1 ) 1 (cm 3 ) (cm 3 ) shaft PSS8ND 2 9 1 2 8.5 18 9.5.5.9.4.2 PSS8NBD 4 1 95 3 8 7.5 28 9.5.5.11.5.3 8 2 18.5 or less 5 PSS8ND 2 9 1 2 8 22 7 13..4.2 PSS8NBD 4 1 95 3 8 5 37 7 13...3 1. ontact NSK if permissible rotational speed is to be exceeded. 2. Service temperature range is to 8º. 3. Use of NSK support unit is recommended. Refer to pages 45 to 48 for details. Standard grease replenishing 9
ompact Series PSS Type for eneral Uses shaft diameter mm, 5 and mm.2.. 5.7.18..1.8.1.8.5 9.7.2 23 g 2. 7 11 8.7 8.1 3.2 t quenching range 5 a 43 11.5 4 8.2.8 8.5 37.18 9 M8 1..8 h. 4-4.5 drill thru 13 13 2 PD 33 14 21 Preload type Oversize ball (P-preload) Ball /screw shaft root 2. / 8.2 Ball circle.3 ccuracy grade/axial play 5 / actory-packed grease NSK grease PS2 or drive side (ixed) WBK8-1B (square, low) P 45 WBK8-11 WBK8-11B (round, high-load) P 47 or opposite to drive side (Simple) WBK8S-1B (square, low) P 49 PSS PSS5N1D171 shaft Basic load ratings (N) Static Nominal Stroke Max. Nut length shaft dimensions Target value accuracy d l a a t - t a T e p V u (N cm)* 1 (kg) ixed-simple (cm 3 ) (cm 3 ) 5 83 1 5 171 PSS5N1D321 5 2 93 4 79 2 233 29 22 5 321.23.18.. to 4.3.3 PSS5N1D521 4 433 42 475 521..2.85.4 to 4.9.5 rror Variation preload Mass.2.18.3.7 to 3.3.3 PSS5N1D221 133 12 175 221.2.18.45.7 to 3.3.3 PSS5N1D421 3 333 32 375 421.25.2.7. to 4.3.4 PSSN1D221 13 12 175 221.2.18.45.7 to 3.3.3 PSSN1D321 2 23 22 5 321.23.18.. to 4.3.4 1 97 3 32 PSSN1D421 3 33 32 375 421.25.2.7. to 4.3.4 PSSN1D521 4 43 42 475 521..2.85.4 to 4.9.5 Permissible rotational speed (min -1 )* 2 5 Internal spatial nut.8.7 Standard grease replenishing.4 1. Indicates ball screw preload control value. pproximately 2. N cm of is added due to thin plastic seals. 2. ontact NSK if permissible rotational speed is to be exceeded. 3. Service temperature range is to 8º. 4. Use of NSK support unit is recommended. Refer to pages 45 to 48 for details. 11
ompact Series PSS Type for eneral Uses shaft diameter mm, 5,, 2 and 3 mm.2.. 5.7.18..8.1.1.8 4 9.5 9.7.2 24 g 2. 8.7 7 11 t quenching range a 8.1 3 44.2 1 11.5 8.2.8 8.5 37.18 M8 1..8 h. 13.5 13.5 4-4.5 drill thru 8 c'bore 4.5 depth PD 34 14.5 21.5 Preload type Oversize ball (P-preload) Ball /screw shaft root 2. /.2 Ball circle.3 ccuracy grade/axial play 5 / actory-packed grease NSK grease PS2 or drive side (ixed) WBK8-1B (square, low) P 45 WBK8-11 or opposite to drive side (Simple) WBK8S-1B (square, low) P 49 PSS WBK8-11B (round, high-load) P 47 PSS5N1D171 Basic load Stroke shaft dimensions accuracy Permissible Internal ratings (N) Nut rotational spatial preload Mass length Target speed Static Max. rror Variation Nominal value (min -1 )* 2 nut d l a a t - t a 1 T e p V u (N cm)* 1 (kg) ixed-simple (cm 3 ) (cm 3 ) shaft 5 8 1 5 171.2.18.3.7 to 3.3.3 PSS5N1D221 13 1 175 221.2.18.45.7 to 3.3.3 PSS5N1D321 2 23 2 5 321.23.18.. to 4.3.4 5 3 2 5 8 3 7 PSS5N1D421 3 33 3 375 421.25.2.7. to 4.3.5 PSS5N1D521 4 43 4 475 521..2.85. to 4.3. PSS5N1D21 5 53 5 575 21.3.23.85.4 to 4.9.7 PSSN1D221 117 1 175 221.2.18.45.7 to 3.3.4 PSSN1D321 2 217 2 5 321.23.18.. to 4.3.5 PSSN1D421 3 2 5 8 3 317 43 3 375 421 7.25.2.7. to 4.3.5 PSSN1D521 4 417 4 475 521..2.85. to 4.3. PSSN1D21 5 517 5 575 21.3.23.85.4 to 4.9.7 PSS2N1D1 8 28 225 1.23.18.45 1.4 to 4.5.4 PSS2N1D371 2 258 38 325 371.23.18..9 to 4.9.5 PSS2N1D471 2 2 3 3 358 5 48 425 471 9..2.7.9 to 4.9. PSS2N1D571 4 458 58 525 571.3.23.85. to 5.9.7 PSS2N1D71 5 558 8 25 71.3.23.1. to 5.9.8 4 2 PSS3N1D1 133 23 225 1.23.18.45 1.4 to 4.5.5 PSS3N1D371 2 233 33 325 371.23.18..9 to 4.9. PSS3N1D471 3 2 3 3 333 7 43 425 471 14..2.7.9 to 4.9.7 PSS3N1D571 4 433 53 525 571.3.23.85. to 5.9.7 PSS3N1D71 5 533 3 25 71.3.23.1. to 5.9.8 4 3 1. Indicates ball screw preload control value. pproximately 2. N cm of is added due to thin plastic seals. 2. ontact NSK if permissible rotational speed is to be exceeded. 3. Service temperature range is to 8º. 4. Use of NSK support unit is recommended. Refer to pages 45 to 5 for details. 13 14 Standard grease replenishing 5 1..5 5 1..5 5 5 1.2. 1.5.8
ompact Series PSS Type for eneral Uses shaft diameter mm, 5 and mm Shape II Shape I.4..9.17 M 1..4..17 9. 9..9 3.1 9..14 1. 1. 9..5.14.1 14.7.2 28 g. 2 thin plastic seal (synthetic plastic). 11 t quenching range 8.7 7 a 8.1 3 51.25 8.3.11 5.5 3.17 45 M 1..9 h.11.5 31.5 ross-section 4-5.5 drill thru 9.5 c'bore 5.5 depth PD 39 18 25 Preload type Oversize ball (P-preload) Ball /screw shaft root 2.778 /. Ball circle.5 ccuracy grade/axial play 5 / actory-packed grease NSK grease R3 or drive side or opposite to drive side (ixed) (ixed) (Simple) WBK-1B (square, low) P 45 WBK-11 (round) P 47 WBK-1B (square, low) P 45 WBK-11 WBKS-1B (square, low) P 49 PSS PSS5N1D211 Basic load ratings (N) Stroke shaft dimensions eft shaft accuracy Internal Permissible Nut end spatial preload Mass rotational speed length (opposite Target (min -1 )* 2 Static Max. rror Variation Nominal driven value nut d l a a t - t a side) T e p V u (N cm)* 1 (kg) ixed-simple ixed-ixed (cm 3 ) (cm 3 ) shaft 5 9 139 4 211.2.18.35.2 to.9.5 PSS5N1D21 9 189 24 21.2.18.35.2 to.9.5 PSS5N1D31 2 259 289 34 31.23.18.45.2 to.9. PSS5N1D41 5 3 359 3 389 44 41.25.2.5.4 to 9.8.8 PSS5N1D51 4 459 489 54 51..2..4 to 9.8.9 PSS5N1D1 5 559 589 4 1.3.23.75.4 to 9.8 1. PSS5N1D71 59 89 74 71.35.25.75.4 to 11.8 1.1 3 PSSN1D21 14 189 24 21.2.18.35. to 7.4. 5 4 2 PSSN1D31 2 24 289 34 31.23.18.45. to 7.4.7 PSSN1D41 3 34 389 44 41.25.2.5.4 to 9.8.8 PSSN1D51 4 44 489 54 51..2..4 9.8 1. PSSN1D1 5 54 43 589 4 1.3.23.75.4 to 9.8 1.1 PSSN1D71 4 89 74 71.35.25.75.4 to 11.8 1.2 3 PSSN1D879 7 74 789 84 879.35.25.95.4 to 11.8 1.4 2 7 3 4 PSSN1D979 8 84 889 94 979.4..95.4 to 11.8 1.5 2 2 3 4 PSSN1D1179 1 1 4 1 89 1 4 1 179.4.3..4 to 11.8 1.7 1 4 2 3 5 5 Standard grease replenishing 2. 1. 1. Indicates ball screw preload control value. pproximately 2. N cm of is added due to thin plastic seals. 2. ontact NSK if permissible rotational speed is to be exceeded. 3. Service temperature range is to 8º. 4. Use of NSK support unit is recommended. Refer to pages 45 to 5 for details. 1
ompact Series PSS Type for eneral Uses shaft diameter mm, 2 and 3 mm Shape II Shape I.4..9.17 M 1..4..17 9. 9..9.1 9..14 1..14 1..1 9..5 14.9.25 32 g. 2. t quenching range 8.7 7 11 8.1 3 55.25 8 1.3.11 5.5 3.17 M 1..9 h.11 1.5 33 1.5 4-5.5 drill thru 9.5 c'bore 5.5 depth PD 43 2 Preload type Oversize ball (P-preload) Ball /screw shaft root 3.175 /.2 Ball circle.5 ccuracy grade/axial play 5 / actory-packed grease NSK grease R3 or drive side or opposite to drive side (ixed) (ixed) (Simple) WBK-1B (square, low) P 45 WBK-11 (round) P 47 WBK-1B (square, low) P 45 WBK-11 WBKS-1B (square, low) P 49 PSS 3 a 45 Basic load ratings (N) Stroke shaft dimensions eft shaft accuracy Internal Standard Permissible Nut shaft end spatial preload Mass rotational speed length (opposite Target (min -1 )* 2 grease Static Max. rror Variation Nominal driven value nut replenishing d l side) a a t - t a 1 T e p V u (N cm)* 1 (kg) ixed-simple ixed-ixed (cm 3 ) (cm 3 ) PSS2N1D21 135 18 24 21.2.18.35.8 to 8.8.7 PSS2N1D31 2 235 28 34 31.23.18.45.8 to 8.8.8 PSS2N1D41 3 335 38 44 41.25.2.5.8 to.8.9 5 PSS2N1D51 4 435 48 54 51..2..8 to.8 1.1 PSS2N1D1 2 5 535 51 58 4 1 18.3.23.75.8 to.8 1.2 PSS2N1D71 35 8 74 71.35.25.75.8 to 13.8 1.3 3 7 PSS2N1D879 7 735 78 84 879.35.25.95.8 to 13.8 1.5 2 9 4 2 PSS2N1D979 8 835 88 94 979.4..95.8 to 13.8 1. 2 2 3 3 PSS2N1D1179 1 1 35 1 8 1 4 1 179.4.3..8 to 13.8 1.9 1 5 2 2 5 7 8 73 PSS3N1D311 9 23 254 311.23.18.35 1.2 to 9.3.8 PSS3N1D411 2 259 33 354 411.25.2.5.8 to.8 1. 5 PSS3N1D511 3 359 43 454 511..2..8 to.8 1.1 PSS3N1D11 4 459 53 554 11.3.23..8 to.8 1.2 PSS3N1D711 3 5 559 71 3 54 711 24.3.23.75.8 to 13.8 1.4 4 5 PSS3N1D811 59 73 754 811.35.25.95.8 to 13.8 1.5 3 3 PSS3N1D929 7 759 83 854 929.4..95.8 to 13.8 1. 2 3 8 PSS3N1D29 8 859 93 954 1 29.4...8 to 13.8 1.8 2 3 PSS3N1D29 1 1 59 1 13 1 4 1 229.4.3..8 to 13.8 2. 1 4 2 2.8 1.4 3.4 1.7 1. Indicates ball screw preload control value. pproximately 2. N cm of is added due to thin plastic seals. 2. ontact NSK if permissible rotational speed is to be exceeded. 3. Service temperature range is to 8º. 4. Use of NSK support unit is recommended. Refer to pages 45 to 5 for details. 17 18
ompact Series PSS Type for eneral Uses shaft diameter 2 mm, 5 and mm Shape II Shape I.17 M 1..4..17.4..11 14.3 14.3.11 1..14..1 13.5 4. 1. 19.5 7.1.14 2.9.25 3 g. 2 thin plastic seal (synthetic plastic).11 8.7 7 13 t quenching range a 8.1 3 2 17.25 22 19.5 7.4..5 4.17 M 1. 2.11 h. 19 38 19 ross-section 4-. drill thru 11 c'bore.5 depth PD 49 23.5 3.5 Preload type Oversize ball (P-preload) Ball /screw shaft root 3.175 / 17.2 Ball circle 2.5 ccuracy grade/axial play 5 / actory-packed grease NSK grease R3 or drive side or opposite to drive side (ixed) (ixed) (Simple) WBK-1B (square, low) P 45 WBK-11 WBK-1B (square, low) P 45 WBK-11 WBKS-1B (square, low) P 49 PSS PSS25N1D323 Basic load ratings (N) Stroke shaft dimensions eft shaft accuracy Internal Permissible Nut end spatial preload Mass rotational speed length (opposite Target (min -1 )* 2 Static Max. rror Variation Nominal driven value nut d l a a t - t a side) T e p V u (N cm)* 1 (kg) ixed-simple ixed-ixed (cm 3 ) (cm 3 ) shaft 197 228 25 323.23.18.45. to 7.4 1. PSS25N1D373 2 247 8 3 373.23.18.45. to 7.4 1.1 PSS25N1D473 3 347 378 4 473.25.2.5. to 7.4 1.3 PSS25N1D573 4 447 478 5 573..2..4 to 9.8 1.5 5 31 PSS25N1D73 5 547 578 73.3.23.75.4 to 9.8 1.7 PSS25N1D773 47 78 7 773.35.25.75.4 to 9.8 1.9 PSS25N1D873 7 747 778 8 873.35.25.95.4 to 9.8 2.2 4 PSS25N1D 8 847 878 9.4..95.4 to 11.8 2.4 3 2 4 7 PSS2N1D387 2 8 79 18 5 2 247 292 314 387.23.18.45 1.2 to 9.3 1.2 PSS2N1D487 3 347 392 414 487.25.2.5 1.2 to 9.3 1.4 PSS2N1D587 4 447 492 514 587..2..8 to.8 1.7 5 PSS2N1D87 5 547 592 14 87.3.23.75.8 to.8 1.9 PSS2N1D787 47 45 92 714 787.35.25.75.8 to.8 2.1 PSS2N1D887 7 747 792 814 887.35.25.95.8 to.8 2.4 4 PSS2N1D14 8 847 892 914 1 14.4...8 to 13.8 2. 3 4 PSS2N1D14 1 1 47 1 92 1 114 1 214.4.3..8 to 13.8 3.1 2 3 PSS2N1D1414 1 2 1 247 1 292 1 314 1 414.54.35.1.8 to 13.8 3. 1 5 2 2 5 Standard grease replenishing 3.4 1.7 3.2 1. 1. Indicates ball screw preload control value. pproximately 2. N cm of is added due to thin plastic seals. 2. ontact NSK if permissible rotational speed is to be exceeded. 3. Service temperature range is to 8º. 4. Use of NSK support unit is recommended. Refer to pages 45 to 5 for details. 19 2
ompact Series PSS Type for eneral Uses shaft diameter 2 mm, 2 and 3 mm Shape II.17 M 1. Shape I.4..17.4..11 14.3 14.3.11 1..14..1 13.5 4. 1. 19.5 7.1.14 2.9.25 3 g. 2.11 8.7 7 13 t quenching range a 8.1 3 2 17.25 1 19.5 7.4..5 4.17 M 1. 2.11 h. 19 38 19 4-. drill thru 11 c'bore.5 depth PD 49 23.5 3.5 Preload type Oversize ball (P-preload) Ball /screw shaft root 3.175 / 17.2 Ball circle 2.5 ccuracy grade/axial play 5 / actory-packed grease NSK grease R3 or drive side or opposite to drive side (ixed) (ixed) (Simple) WBK-1B (square, low) P 45 WBK-11 WBK-1B (square, low) P 45 WBK-11 WBKS-1B (square, low) P 49 PSS PSS22N1D58 Basic load ratings (N) Stroke shaft dimensions eft shaft accuracy Internal Standard Permissible Nut shaft end spatial preload Mass rotational speed length (opposite Target (min -1 )* 2 grease Static Max. rror Variation Nominal driven value nut replenishing d l a a t - t a 1 side) T e p V u (N cm)* 1 (kg) ixed-simple ixed-ixed (cm 3 ) (cm 3 ) 3 359 413 435 58..2. 1.4 to 11.8 1. PSS22N1D8 4 459 513 535 8.3.23. 1.4 to 11.8 1.8 PSS22N1D78 5 559 13 35 78.3.23.75 1.4 to 11.8 2. PSS22N1D88 59 713 735 88.35.25.95 1.4 to 11.8 2.3 PSS22N1D98 2 7 759 54 813 835 98 22.4..95.8 to 13.8 2.5 3 7 PSS22N1D35 8 859 913 935 1 35 PSS22N1D35 1 1 59 1 113 1 135 1 235.4.3..8 to 13.8 3.3 2 3 PSS22N1D1435 1 2 1 259 1 313 1 335 1 435.54.35.1.8 to 13.8 3.8 1 4 2 PSS22N1D1835 1 1 59 1 713 1 735 1 835.5.4.2.8 to 13.8 4.7 8 1 2 2 5 9 11 7 PSS23N1D48 2 234 38 335 48.23.18.5 1. to 9.8 1.4 PSS23N1D58 3 334 48 435 58..2. 1.4 to 11.8 1.7 PSS23N1D8 4 434 58 535 8.3.23. 1.4 to 11.8 1.9 5 PSS23N1D78 5 534 8 35 78.3.23.75 1.4 to 11.8 2.1 PSS23N1D88 3 34 74 78 735 88.35.25.95 1.4 to 11.8 2.4 PSS23N1D98 7 734 88 835 98.4..95.8 to 13.8 2. 3 9 PSS23N1D35 8 834 98 935 1 35.4...8 to 13.8 2.9 3 4 PSS23N1D35 1 1 34 1 8 1 135 1 235.4.3..8 to 13.8 3.4 2 3 PSS23N1D1435 1 2 1 234 1 38 1 335 1 435.54.35.1.8 to 13.8 3.9 1 5 2 2 1. Indicates ball screw preload control value. pproximately 2. N cm of is added due to thin plastic seals. 2. ontact NSK if permissible rotational speed is to be exceeded. 5.4...8 to 13.8 2.8 3 4 5 3. Service temperature range is to 8º. 4. Use of NSK support unit is recommended. Refer to pages 45 to 5 for details. 3.2 1. 4. 2.3 21 22
ompact Series PSS Type for eneral Uses shaft diameter 2 mm, 4 and mm Shape II.17 M 1. Shape I.4..17.4..11 14.3.11 14.3 1..14..1 13.5 4. 1. 19.5 7.1.14 2.9.25 3 g. 2.11 8.7 7 13 t quenching range a 8.1 3 2 17.25 1 19.5 7.4..5 4.17 M 1. 2.11 h. 19 38 19 4-. drill thru 11 c'bore.5 depth PD 49 23.5 3.5 Preload type Oversize ball (P-preload) Ball /screw shaft root 3.175 / 17.2 Ball circle 2.5 ccuracy grade/axial play 5 / actory-packed grease NSK grease R3 or drive side or opposite to drive side (ixed) (ixed) (Simple) WBK-1B (square, low) P 45 WBK-11 WBK-1B (square, low) P 45 WBK-11 WBKS-1B (square, low) P 49 PSS PSS24N1D58 Basic load ratings (N) Stroke shaft dimensions eft shaft accuracy Internal Standard Permissible Nut shaft end spatial preload Mass rotational speed length (opposite Target (min -1 )* 2 grease Static Max. rror Variation Nominal driven value nut replenishing d l side) a a t - t a 1 T e p V u (N cm)* 1 (kg) ixed-simple ixed-ixed (cm 3 ) (cm 3 ) 4 41 553 585 58 PSS24N1D758 5 51 53 85 758.35.25.75 2.2 to.8 2.4 PSS24N1D858 1 753 785 858.35.25.95 2.2 to.8 2. PSS24N1D85 4 8 81 92 953 985 1 85 32.3.23.75 2.2 to.8 2.1 PSS24N1D958 7 71 853 885 958.4..95 1.8 to 14.8 2.8 3 5 PSS24N1D1485 1 2 1 21 1 353 1 385 1 485.54.35.1 1.8 to 14.8 4.1 1 4 2 PSS24N1D2285 2 2 1 2 3 2 185 2 285.77.4.24 1.8 to 14.8. 5 8 2 5 9 11 7 PSS2N1D78 4 44 593 35 78.3.23.75 2.7 to 13.8 2.4 5 PSS2N1D88 5 54 93 735 88.35.25.95 2.7 to 13.8 2. PSS2N1D98 4 793 835 98.35.25.95 2.7 to 13.8 2.9 4 2 5.4.. 1.8 to 14.8 3.1 2 8 4 2 PSS24N1D85 1 1 1 1 3 1 185 1 285.4.3.1 1.8 to 14.8 3. 1 9 2 8 PSS24N1D1885 1 1 1 1 753 1 785 1 885.5.4.2 1.8 to 14.8 5.1 8 1 2 PSS2N1D8 7 74 893 935 1 8.4.. 1.8 to 14.8 3.1 3 3 PSS2N1D1135 8 84 9 993 1 35 1 135 42.4.. 1.8 to 14.8 3.4 2 3 9 PSS2N1D1335 1 1 4 1 193 1 235 1 335.4.3.1 1.8 to 14.8 3.9 1 8 2 7 PSS2N1D35 1 2 1 24 1 393 1 435 1 535.54.35.1 1.8 to 14.8 4.4 1 3 1 9 PSS2N1D1935 1 1 4 1 793 1 835 1 935.5.4.2 1.8 to 14.8 5.4 8 1 PSS2N1D2335 2 2 4 2 193 2 235 2 335.77.4.24 1.8 to 14.8.3 5 7 1. Indicates ball screw preload control value. pproximately 2. N cm of is added due to thin plastic seals. 2. ontact NSK if permissible rotational speed is to be exceeded. 3. Service temperature range is to 8º. 4. Use of NSK support unit is recommended. Refer to pages 45 to 5 for details. 5.3 2.7 7. 3.5 23 24
ompact Series PSS Type for eneral Uses shaft diameter 25 mm, 5 and mm Shape II Shape I 19.1.1..35 M2 1..5.14 2 1.1.5.14.21 2 19.21 19 53.14 1.35.5 1.35.14.35.1 25.9.25 4 g 2.11 7 t quenching range a 8.7 3 8.1 2.35 22 25.5.14 2.5 53.22 8 1 M2 1..11 h. 3.5 45 45 22.5 24 24 48 45 45 -. drill thru PD 51 PD 47 Preload type Oversize ball (P-preload) Ball /screw shaft root 3.175 / 22.2 Ball circle 25.5 ccuracy grade/axial play 5 / actory-packed grease NSK grease R3 or drive side or opposite to drive side (ixed) (ixed) (Simple) WBK2-1 (square) P 45 WBK2-11 WBK2-1 (square) P 45 WBK2-11 WBK2S-1 (square) P 49 PSS PSS255N1D349 Basic load ratings (N) Stroke shaft dimensions eft shaft accuracy Internal Permissible Nut end spatial preload Mass rotational speed length (opposite Target (min -1 )* 2 Static Max. rror Variation Nominal driven value nut d l a a t - t a side) T e p V u (N cm)* 1 (kg) ixed-simple ixed-ixed (cm 3 ) (cm 3 ) shaft 191 223 25 349.23.18.35 1.2 to 9.3 1.5 PSS255N1D399 2 241 3 3 399.23.18.35 1.2 to 9.3 1. PSS255N1D499 3 341 373 4 499.25.2.4 1.2 to 9.3 2. PSS255N1D599 4 441 473 5 599..2.45 1.2 to 9.3 2.3 5 9 7 23 32 PSS255N1D99 5 541 573 99.3.23.55.8 to.8 2.7 PSS255N1D899 7 741 773 8 899.35.25.5.8 to.8 3.4 PSS255N1D999 8 841 873 9 999.4..5.8 to.8 3.7 4 PSS255N1D33 1 1 41 1 73 1 1 233.4.3.8.8 to 13.8 4.5 2 7 4 25 PSS25N1D549 3 37 423 45 549..2.45 3.1 to 11.8 2.4 PSS25N1D49 4 47 523 55 49.3.23.55 2.2 to.8 2.7 PSS25N1D749 5 57 23 5 749.3.23.55 2.2 to.8 3.1 5 PSS25N1D849 7 723 75 849.35.25.5 2.2 to.8 3.5 8 32 3 5 PSS25N1D949 7 77 823 85 949.4..5 2.2 to.8 3.8 PSS25N1D49 8 87 923 95 1 49.4..8 2.2 to.8 4.2 3 PSS25N1D83 1 1 7 1 3 1 1 283.4.3. 1.8 to 14.8 5. 2 5 3 7 PSS25N1D1883 1 1 7 1 723 1 75 1 883.5.4.13 1.8 to 14.8 7.2 1 1 1. Indicates ball screw preload control value. pproximately 2. N cm of is added due to thin plastic seals. 2. ontact NSK if permissible rotational speed is to be exceeded. 3. Service temperature range is to 8º. 4. Use of NSK support unit is recommended. Refer to pages 45 to 5 for details. 5 Standard grease replenishing 4.4 2.2 4.7 2.4 25 2
ompact Series PSS Type for eneral Uses shaft diameter 25 mm, 2 and 25 mm Shape II Shape I 19.1.1..35 M2 1..5.14 2 1.1.5.14.21 2 19.21 19 1.35 53.14.5 1.35.14.35.1 25.9.25 4 g 2 thin plastic seal (synthetic plastic).11 7 t quenching range a 8.7 3 8.1 2.35 22 1 25.5.14 2.5 53.22 8 1 M2 1..11 h. 3.5 45 45 22.5 24 24 48 45 45 ross-section -. drill thru PD 51 PD 47 Preload type Oversize ball (P-preload) Ball /screw shaft root 3.175 / 22.2 Ball circle 25.5 ccuracy grade/axial play 5 / actory-packed grease NSK grease R3 or drive side or opposite to drive side (ixed) (ixed) (Simple) WBK2-1 (square) P 45 WBK2-11 WBK2-1 (square) P 45 WBK2-11 WBK2S-1 (square) P 49 PSS Basic load ratings (N) Stroke shaft dimensions eft shaft accuracy Internal Standard Permissible Nut shaft end spatial preload Mass rotational speed length (opposite Target (min -1 )* 2 grease Static Max. rror Variation Nominal driven value nut replenishing d l a a t - t a 1 side) T e p V u (N cm)* 1 (kg) ixed-simple ixed-ixed (cm 3 ) (cm 3 ) PSS252N1D729 5 55 4 3 729.3.23.55 2.2 to.8 3.1 5 PSS252N1D829 5 74 73 829.35.25.5 2.2 to.8 3.4 PSS252N1D929 7 75 84 83 929.4..5 2.2 to.8 3.8 4 8 PSS252N1D29 8 85 94 93 1 29.4..8 2.2 to.8 4.2 3 8 2 54 2 PSS252N1D3 1 1 5 1 4 1 13 1 23.4.3. 1.8 to 14.8 5. 2 3 8 PSS252N1D143 1 2 1 25 1 34 1 33 1 43.54.35. 1.8 to 14.8 5.8 1 8 2 7 PSS252N1D183 1 1 5 1 74 1 73 1 83.5.4.13 1.8 to 14.8 7.3 1 1 PSS252N1D223 2 2 5 2 4 2 13 2 23.77.4.17 1.8 to 14.8 8.8 7 1 25 5 14 PSS2525N1D779 5 587 5 8 779.35.25.55 2.7 to 13.8 3.3 5 PSS2525N1D879 87 75 78 879.35.25.5 2.7 to 13.8 3.7 PSS2525N1D979 7 787 85 88 979.4..5 2.7 to 13.8 4.1 4 3 PSS2525N1D79 8 887 95 98 1 79.4..8 2.7 to 13.8 4.4 3 4 25 3 3 PSS2525N1D1313 1 1 87 1 1 18 1 313.4.3. 1.8 to 14.8 5.3 2 3 3 5 PSS2525N1D13 1 2 1 287 1 35 1 38 1 513.54.35. 1.8 to 14.8. 1 7 2 PSS2525N1D1913 1 1 87 1 75 1 78 1 913.5.4.13 1.8 to 14.8 7.5 1 1 5 PSS2525N1D2313 2 2 87 2 2 18 2 313.77.4.17 1.8 to 14.8 9.1 7 1 3.9 2. 4.3 2.2 1. Indicates ball screw preload control value. pproximately 2. N cm of is added due to thin plastic seals. 2. ontact NSK if permissible rotational speed is to be exceeded. 3. Service temperature range is to 8º. 4. Use of NSK support unit is recommended. Refer to pages 45 to 5 for details. 28
ompact Series PSS Type for eneral Uses shaft diameter 25 mm, 3 and 5 mm Shape II Shape I 19.1.1..35 M2 1..5.14 2.5.14 1.1.21 2 19.21 19 1.35 53.14.5 1.35.14.35.1 25.9.25 4 g 2 thin plastic seal (synthetic plastic).11 7 t quenching range a 3 8.1 8.7 2.35 22 1 25.5.14 2.5 53.22 8 1 M2 1..11 h. 3.5 45 45 22.5 24 24 48 45 45 ross-section -. drill thru PD 51 PD 47 Preload type Oversize ball (P-preload) Ball /screw shaft root 3.175 / 22.2 Ball circle 25.5 ccuracy grade/axial play 5 / actory-packed grease NSK grease R3 or drive side or opposite to drive side (ixed) (ixed) (Simple) WBK2-1 (square) P 45 WBK2-11 WBK2-1 (square) P 45 WBK2-11 WBK2S-1 (square) P 49 PSS Basic load ratings (N) Stroke shaft dimensions eft shaft accuracy Internal Permissible Nut end spatial preload Mass rotational speed length (opposite Target (min -1 )* 2 Static Max. rror Variation Nominal driven value nut d l a a t - t a 1 side) T e p V u (N cm)* 1 (kg) ixed-simple ixed-ixed (cm 3 ) (cm 3 ) shaft PSS253N1D779 5 57 5 8 779.35.25.55 2.7 to 13.8 3.4 5 PSS253N1D879 7 75 78 879.35.25.5 2.7 to 13.8 3.7 PSS253N1D979 7 77 85 88 979.4..5 2.7 to 13.8 4.1 4 3 PSS253N1D79 8 87 95 98 1 79.4..8 2.7 to 13.8 4.5 3 4 3 74 3 PSS253N1D1313 1 1 7 1 1 18 1 313.4.3. 1.8 to 14.8 5.3 2 3 3 PSS253N1D13 1 2 1 1 35 1 38 1 513.54.35. 1.8 to 14.8.1 1 7 2 PSS253N1D1913 1 1 7 1 75 1 78 1 913.5.4.13 1.8 to 14.8 7. 1 1 5 PSS253N1D2313 2 2 7 2 2 18 2 313.77.4.17 1.8 to 14.8 9.1 7 1 25 5 14 PSS255N1D829 5 57 9 73 829.35.25.5 5.4 to 17. 3.8 5 PSS255N1D929 7 79 83 929.35.25.5 5.4 to 17. 4.1 4 8 PSS255N1D29 7 77 89 93 1 29.4..8 5.4 to 17. 4.5 3 8 PSS255N1D19 8 87 99 1 3 1 9.4..8 5.4 to 17. 4.9 3 5 114 4 PSS255N1D133 1 1 7 1 19 1 23 1 33.4.3. 4.1 to 19. 5.8 2 2 3 4 PSS255N1D3 1 2 1 1 39 1 43 1 53.54.35. 4.1 to 19..5 1 2 5 PSS255N1D193 1 1 7 1 79 1 83 1 93.5.4.13 4.1 to 19. 8. 9 1 5 PSS255N1D233 2 2 7 2 19 2 23 2 33.77.4.17 4.1 to 19. 9. 1 Standard grease replenishing 5.5 2.8 7.7 3.9 1. Indicates ball screw preload control value. pproximately 2. N cm of is added due to thin plastic seals. 2. ontact NSK if permissible rotational speed is to be exceeded. 3. Service temperature range is to 8º. 4. Use of NSK support unit is recommended. Refer to pages 45 to 5 for details. 29 3
ompact Series USS Type for High-ccuracy and lean Uses shaft diameter mm, 5 mm.2.. 5.7.14..8.8.1.1.3 9.7.2 23g Basic load ratings (N) Stroke shaft dimensions accuracy Permissible Internal rotational spatial preload Mass Target speed Static Max. rror Variation Nominal value (min -1 )* 2 nut d l a a t - t a T e p V u (N cm)* 1 (kg) ixed-simple (cm 3 ) (cm 3 ) shaft 2.8 8.7 8.1 3 7 11 29 t quenching range 5 a 43.2 11.5 4 8.2.8 8.3 37.14 9 M8 1..8 h 4-4.5 drill thru 8 c'bore 4.5 depth USS5N1D221 133 12 175 221..8.35.2 to 1.8.3 USS5N1D321 5 2 93 4 79 2 233 22 5 321..8.45.2 to 2..3 USS5N1D521 4 433 42 475 521...7.2 to 3..5.8 13 13 2 PD 33 14 21 Standard grease replenishing 5.8.4 Preload type Oversize ball (P-preload) Ball /screw shaft root 2. / 8.2 Ball circle.3 ccuracy grade/axial play 3 / actory-packed grease NSK clean grease 2 or drive side (ixed) or opposite to drive side (Simple) WBK8-1B (square, low) P 45 WBK8S-1B (square, low) P 49 WBK8S-1 (square, clean) WBK8-11 P 49 WBK8-1 (square, clean) P 45 WBK8-1 (round, clean) P 47 USS 1. Indicates ball screw preload control value. pproximately.5 N cm of is added due to thin plastic seals. 2. ontact NSK if permissible rotational speed is to be exceeded. 3. Service temperature range is to 8º. 4. Use of NSK support unit is recommended. Refer to pages 45 to 5 for details. 31 32
ompact Series USS Type for High-ccuracy and lean Uses shaft diameter mm, 5 mm.2.. 5.7.14.8.1.1.8 4 9.3 9.7.2 24g. 2 thin plastic seal (synthetic plastic).8 8.7 7 11 3 t quenching range a 8.1 3 44.2 7 11.5 8.2.8 8.3 37.14 M8 1..8 h.8 13.5 13.5 ross-section 4-4.5 drill thru 8 c'bore 4.5 depth PD 34 14.5 21.5 Preload type Oversize ball (P-preload) Ball /screw shaft root 2. /.2 Ball circle.3 ccuracy grade/axial play 3 / actory-packed grease NSK clean grease 2 or drive side (ixed) or opposite to drive side (Simple) WBK8-1B (square, low) P 45 WBK8S-1B (square, low) P 49 WBK8S-1 (square, clean) WBK8-11 P 49 WBK8-1 (square, clean) P 45 WBK8-1 (round, clean) P 47 USS Basic load ratings (N) Stroke shaft dimensions accuracy Permissible Internal rotational spatial preload Mass Target speed Static Max. rror Variation Nominal value (min -1 )* 2 nut d l a a t - t a T e p V u (N cm)* 1 (kg) ixed-simple (cm 3 ) (cm 3 ) shaft USS5N1D221 13 1 175 221..8.35.2 to 1.8.3 USS5N1D321 5 3 2 5 8 2 23 2 5 321..8.45.2 to 2..3 USS5N1D21 5 53 5 575 21.1..7.2 to 3..7 Standard grease replenishing 5 1..5 1. Indicates ball screw preload control value. pproximately.5 N cm of is added due to thin plastic seals. 2. ontact NSK if permissible rotational speed is to be exceeded. 3. Service temperature range is to 8º. 4. Use of NSK support unit is recommended. Refer to pages 45 to 5 for details. 33 34
ompact Series USS Type for High-ccuracy and lean Uses shaft diameter mm, 5 mm.4..9 9..3.13 9..1.14 1..7.2 28g..8 2 thin plastic seal (synthetic plastic) 3 8.7 7 11 t quenching range a 8.1 3 51 8.25.3.11 5.3 3.13 45 M 1..9 h.8.5 31.5 ross-section 4-5.5 drill thru 9.5 c'bore 5.5 depth PD 39 18 25 Preload type Oversize ball (P-preload) Ball /screw shaft root 2.778 /. Ball circle.5 ccuracy grade/axial play 3 / actory-packed grease NSK clean grease 2 or drive side (ixed) or opposite to drive side (Simple) WBK-1B (square, low) P 45 WBKS-1B (square, low) P 49 WBKS-1 (square, clean) WBK-11 P 49 WBK-1 (square, clean) P 45 WBK-1 (round, clean) P 47 USS USS5N1D21 Basic load ratings (N) Stroke shaft dimensions accuracy Permissible Internal rotational spatial preload Mass Target speed Static Max. rror Variation Nominal value (min -1 )* 2 nut d l a a t - t a T e p V u (N cm)* 1 (kg) ixed-simple (cm 3 ) (cm 3 ) shaft 9 189 24 21..8.25.2 to 5..5 USS5N1D31 2 259 289 34 31..8.35.2 to 5.. 5 5 4 2 USS5N1D51 4 459 489 54 51...45.2 to..9 USS5N1D71 59 89 74 71.18.13..2 to 8. 1.1 3 5 Standard grease replenishing 2. 1. 1. Indicates ball screw preload control value. pproximately.5 N cm of is added due to thin plastic seals. 2. ontact NSK if permissible rotational speed is to be exceeded. 3. Service temperature range is to 8º. 4. Use of NSK support unit is recommended. Refer to pages 45 to 5 for details. 35 3
ompact Series SS Type for Transfer quipment shaft diameter mm, mm -. -.24 g7.2 -.7 -.2 24g 2 thin plastic seal (synthetic plastic).14 43 (7) 11 (8.7) t quenching range a (3) (8.1) 44 -.2.25 11.5 8 4 -.2 -. 8. 37 9 M8 1. -.8 h.14 13.5 13.5 4-4.5 drill thru 8 c'bore 4.5 depth PD 34 14. 5 21.5 Ball /screw shaft root 2. /.2 Ball circle.3 ccuracy grade/axial play t7 /. or less actory-packed grease NSK grease R3 or drive side or opposite to drive side (ixed) (Simple) WBK8-1B (square, low) WBKS-1B (square, low) P 45 P 5 SS ross-section shaft Basic load ratings (N) shaft dimensions accuracy Static Target value rror Variation Mass Internal spatial nut d l a a t a T e p V 3 (kg) (cm 3 ) (cm 3 ) SSN1D4 348 33 4..8.5 SSN1D 3 2 5 8 548 53.195.52..7 SSN1D9 848 83 9.3.18 1. Standard grease replenishing 1..5 1. pproximately 2. N cm of is added due to thin plastic seals. 2. Service temperature range is to 8º. 3. Use of NSK support unit is recommended. Refer to pages 45 to 5 for details. 37 38
ompact Series SS Type for Transfer quipment shaft diameter mm, and 2 mm -. -.24 g7.2 -.7 -. D1g 2 thin plastic seal (synthetic plastic) D2 -.25 -.3 -.11.25.14 M 1. -.9 h 4-5.5 drill thru 9.5 c'bore 5.5 depth PD W 2 Ball /screw shaft root 2.778 /. 3.175 /.2 Ball circle.5 ccuracy grade/axial play t7 /. or less actory-packed grease NSK grease R3 SS B.14 (7) 11 t quenching range a (3) (8.1) (8.7) 8 1 5. 3 45 or drive side or opposite to drive side (ixed) (Simple) WBK-1B (square, low) WBKS-1B (square, low) P 45 P 5 ross-section SSN1D5 shaft Basic load ratings (N) shaft dimensions Nut dimensions accuracy Static d l a a t a 1 D 1 D 2 W B T e p V 3 (kg) (cm 3 ) (cm 3 ) 44 455 5 SSN1D 5 4 2 94 955 1 43 28 51 39 18 31 25.5.3.5 1.7 SSN1D145 1 39 1 45 1 45.49.2 2.3.52 SS2N1D5 437 455 5.5.7 1. SS2N1D 2 5 7 8 73 937 955 1 18 51 32 55 43 2 33 1.5.3.5 1.7 SS2N1D145 1 387 1 45 1 45.49.2 2.3 Target value rror.5 Variation Mass.7.9 Internal spatial nut Standard grease replenishing 2. 1. 2.8 1.4 1. pproximately 2. N cm of is added due to thin plastic seals. 2. Service temperature range is to 8º. 3. Use of NSK support unit is recommended. Refer to pages 45 to 5 for details. 39 4
ompact Series SS Type for Transfer quipment shaft diameter 2 mm, and 2 mm -.7 -.28 2g7 2.25 -.9 -.25 3g 2 thin plastic seal (synthetic plastic).18 (7) 13 t quenching range a (3) (8.1) 2 (8.7) -.25 17.25 22 19.5 7 -.4 -.. 4 2.14 M 1. -.11 h 19 19 38 ross-section 4-. drill thru 11 c'bore.5 depth PD 49 23.5 3.5 Ball /screw shaft root 3.175 / 17.2 Ball circle 2.5 ccuracy grade/axial play t7 /. or less actory-packed grease NSK grease R3 or drive side or opposite to drive side (ixed) (Simple) WBK-1B (square, low) WBK2S-1B (square, low) P 45 P 5 SS SS2N1D shaft Basic load ratings (N) shaft dimensions Nut length accuracy Static Target value rror Variation Mass Internal spatial nut d l a a t a T e p V 3 (kg) (cm 3 ) (cm 3 ) 518 54 SS2N1D 8 79 18 5 918 94 1 45.3.5 2. SS2N1D145 1 38 1 39 1 45.49.2 3. 2.52 SS22N1D 518 54.195.85 1.8 SS22N1D 2 5 9 11 7 918 94 1 54.3.5 2.7.195.85 1.7 SS22N1D145 1 38 1 39 1 45.49.2 3.8 Standard grease replenishing 3.2 1. 1. pproximately 2. N cm of is added due to thin plastic seals. 2. Service temperature range is to 8º. 3. Use of NSK support unit is recommended. Refer to pages 45 to 5 for details. 41 42
ompact Series SS Type for Transfer quipment shaft diameter 25 mm,, 2 and 25 mm -.7 -.28 25g7 25.25 -.9 -.25 4g 2 thin plastic seal (synthetic plastic).18 (7) (3) 2 (8.1) (8.7) t quenching range a o -.35 22.3 25 1 -.5 -.14 2. 53 8 1 M2 1..14 -.11 h 3.5 23.5 45 22.5 45 24 24 48 45 45 ross-section -. drill thru (PD 51) PD 51 Ball /screw shaft root 3.175 / 22.2 Ball circle 25.5 ccuracy grade/axial play t7 /. or less actory-packed grease NSK grease R3 or drive side or opposite to drive side (ixed) (Simple) WBK2-1 (square) P 45 WBK25S-1 (square) P 5 SS shaft Basic load ratings (N) shaft dimensions Nut length accuracy Static Target value rror Variation Mass Internal spatial nut d l a a t a 1 T e p V 3 (kg) (cm 3 ) (cm 3 ) SS25N1D 493 52.5.5 2. SS25N1D 8 32 3 893 92 1 5.3.9 4. SS25N1D145 1 343 1 37 1 45.49.13 5.8 SS252N1D 494 52.5.5 2. SS252N1D 25 2 894 92 1 2 54.3.52.9 4. SS252N1D145 1 344 1 37 1 45.49.13 5.8 5 14 SS2525N1D 49 52.5.5 2. SS2525N1D 25 89 92 1 3 3.3.9 4.1 SS2525N1D145 1 34 1 37 1 45.49.13 5.8 Standard grease replenishing 4.7 2.4 3.9 2. 4.3 2.2 1. pproximately 2. N cm of is added due to thin plastic seals. 2. Service temperature range is to 8º. 3. Use of NSK support unit is recommended. Refer to pages 45 to 5 for details. 43 44
Square Type Support Unit ixed support side support unit (square type) WBK4 and WBK8 to 2 Set screw Brass pad M Retaining cover Set screw K d1 S J S N T U 2- drill thru H View S (WBK4 and ) Tightening (reference) [N cm] ocknut Set screw WBK4-** 9 (M3) WBK-** 19 9 (M3) WBK8-** 23 9 (M3) WBK-** 28 147 (M4) WBK-** 3 147 (M4) WBK-** 79 147 (M4) WBK2-** 1 7 147 (M4) Support Unit Brass pad B d1.5 D M W K J N 2- drill thru Y c'bore Z depth H View S (WBK8 to ) 4- drill thru Y c'bore Z depth Q P Q View S (WBK2) Use ounterbore dimensions 45. or WBK4-1M and WBK-1M, non-contact metal seals are installed in both sides of bearings. 4 Mass Basic dynamic load rating Specification d 1 B D J K R T U N H P Q W Y Z (kg) a (N) a (N) (N/µm) (N cm) M WBK4-1M eneral 4 17 14-14 5.5 7 9 2.5 2 oad limit Rigidity Maximum starting ocknut screw 7 - - 21 3.5 - -.3 1 47 44 39.2 M4.5 - WBK-1M eneral 35 22.5 13 8 19-17 7.5 9.5 2.5 2.5 8.5 - - 2 5.5 - -.5 2 7 854.35 M.75 - WBK8-1 eneral 52 32 17 2 25 23 23 7 - - - 4 11.5 38. 11.25 4 4 1 45 49.88 WBK8-1B ow type 8 2 31.5 31-14 21.5 25.5 4.5 - - - 3.5 11 - - 4 9 14 18.3 2 73 94 1.9 WBK8-1 lean 52 32 17 2 25 23 23 7 - - - 4 11.5 38. 11.25 3 1 3.52 VV WBK-1 eneral 43 25 35 3 11.5 2 73 94 1.9 WBK-1B ow type 7 38 2 38-17 24 3 5.5 - - - - - 52 9 14 19.45 2 73 94 1.9 M8 1 ttached bearing for support side ZZ M 1 8ZZ WBK-1 lean 43 25 35 3 11.5 4 25 1 34 5 1.1 8VV WBK-1 eneral 43 25 35 3 11.5 7 3 4 4 2.1 WBK-1B ow type 7 38 2 38-19 24 3 5.5 - - - - - 52 9 14 19.4 7 3 4 4 2.1 M 1 ZZ WBK-1 lean 43 25 35 3 11.5 4 7 2 443 57 1.2 VV WBK-1 eneral 5 3 4 41.7 7 3 38 113 2.4 WBK-1B ow type 8 42 22 42-22 25 31 - - - 5.5 - - 11 17 23. 7 3 38 113 2.4 M 1 2ZZ WBK-1 lean 5 3 4 41.7 5 2 757 3 1.3 2VV WBK2-1 eneral 2 95 58 3 45 5 3 42 52 - - - 1. 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. - 22 75 11 17 1.4 17 9 8 24 5.2 M2 1 24ZZ 4. Deep groove ball bearing and snap ring are also provided for simple support side. (except WBK4-1M, WBK- 1M) 5. or retaining cover side of WBK8-1 and WBK8-1, there are no seals.
Round Type Support Unit ixed support side support unit (round type) WBK4 and U 2- drill thru PD W Set screw Brass pad D J d H K Set screw Brass pad D g N H d Q P ross section - (xample 2) J Tightening (reference) [N cm] ocknut Set screw WBK4-** 9 (M3) WBK-** 19 9 (M3) WBK8-** 23 9 (M3) WBK-** 28 147 (M4) WBK-** 3 147 (M4) WBK-** 79 147 (M4) WBK2-** 1 7 147 (M4) Support Unit ross section - (xample 1) WBK8 to 2 45 4- drill thru Y c'bore, Z depth W Retaining cover Set screw Brass pad K Set screw Brass pad Q P Retaining cover U d D g d M / 2 / 2 J H View - (xample 1) N H J View - (xample 2) Use ounterbore dimensions 47 48 Mass Basic dynamic load rating Specification d 1 D 1 D 2 H K N U P Q J W Y Z (kg) a (N) a (N) (N/µm) (N cm) M WBK4-11M eneral 4 14 2 14 14 13.5 8.5 7 1.5 5.5. 2. 2.4 3 2 3.5 - -.2 1 47 44 39.2 M4.5 - WBK-11M eneral 19 34 19 18.5 17 9.5 2.5 7.5 8 3 2 4 2 4.5 - -.4 2 7 854.35 M.75 - WBK8-11B High-load 42 52 34-25.5.5 3.5 4.5 7 42 4.5 8.2 2 73 94 1.9 ZZ WBK8-11 eneral 8 14 4 4 4 4 1 45 49.88 M8 1 ZZ 35 43 28-23 14 4 7 8 5 9 35 3.4.5. WBK8-11 lean 3 1 3.52 VV WBK-11 eneral 2 73 94 1.9 8ZZ 42 52 34-17 5 7.5 8.5 17 4 42 4.5 8 4.2 M 1 WBK-11 lean 4 25 1 34 5 1.1 8VV WBK-11 eneral 7 3 4 4 2.1 ZZ 44 54 3-17 5 7.5 8.5 19 4 44 4.5 8 4.25 M 1 WBK-11 lean 4 7 2 443 57 1.2 VV WBK-11 eneral 7 3 38 113 2.4 2ZZ 52 3 4-32 17 11 14 22 8 7 5 5.5 9.5.4 M 1 WBK-11 lean 5 2 757 3 1.3 2VV WBK2-11 eneral 2 8 85 57-52 3 2 14 3 14 8 22 7. 11 1.1 17 9 8 24 5.2 M2 1 24ZZ 1. 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. oad limit Rigidity Maximum starting ocknut screw 3. Deep groove ball bearing and snap ring are also provided for simple support side. (except WBK4-11M and WBK-11M) 4. or retaining cover side of WBK8-11 and WBK8-11, there are no seals. 5. or WBK4-11M and WBK-11M, non-contact metal seals are installed in both sides of bearings. ttached bearing for support side
Square Type Support Unit for Simple Support Side Simple support side support unit for PSS and USS types Simple support side support unit for SS type 2- drill thru Y c'bore Z depth W 2- drill thru Y c'bore Z depth W Support Unit.5.5 B d2 d1 B d Use R/2 R/2 R ounterbore Mass dimensions d 2 B R W Y Z (kg) Bearing reference no. xial direction basic dynamic load rating (N) WBK8S-1B ow 2 31.5 1 4 9 14 18.2 ZZ 2 2 WBKS-1B ow 7 38 2 2 52 9 14 19.4 ZZ 4 55 WBKS-1B ow 8 42 22 2 9 14 23.4 2ZZ 5 ounterbore Mass dimensions d B R W Y Z (kg) Bearing reference no. xial direction basic dynamic load rating (N) WBKS-1B 2 31.5 18 4 9 14 18.2 81ZZ 1 92 WBKS-1B 7 38 2 18 52 9 14 19.3 92ZZ 4 35 WBK2S-1B 2 8 42 22 22 11 17 23.4 84ZZ 4 R / 2 R Note 1. Use datum surface for mounting to machine base. Note 1. Use datum surface for mounting to machine base. 2- drill thru Y c'bore Z depth 2- drill thru Y c'bore Z depth W.5 D B D.5 d B d2 d1 Use W R/2 R/2 R ounterbore dimensions Mass d 2 B D R W Y Z (kg) Bearing reference no. xial direction basic dynamic load rating (N) WBK8S-1 eneral ZZ 2 2 52 32 17 2 25 38. 11. WBK8S-1 lean VV 2 2 WBKS-1 eneral 8ZZ 3 3 8 7 43 25 35 3 2 52 9 14 11.4 WBKS-1 lean 8VV 3 3 WBKS-1 eneral ZZ 4 55 7 43 25 35 3 2 52 9 14 11.35 WBKS-1 lean VV 4 55 WBKS-1 eneral 2ZZ 5 8 5 3 4 41 2 9 14 11.45 WBKS-1 lean 2VV 5 WBK2S-1 eneral 2 95 58 3 45 5 2 75 11 17.8 24ZZ 8 Note ounterbore dimensions Mass d B D R W Y Z (kg) R / 2 R Bearing reference no. xial direction basic dynamic load rating (N) WBK25S-1 25 95 58 3 45 5 22 75 11 17.55 5ZZ 1. Use datum surface for mounting to machine base. Note 1. Use datum surface for mounting to machine base. 49 5
T. No.3239 2 Z-8 NSK td. irst edition published in NOV.29