NSK Ball Screws for Standard Stock
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- Quentin Dean
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1 NSK Ball s for Stanar Stock ompact Series Next-generation compact ball screws offer quiet, high spee operating performance. stanar stock series assures immeiate elivery. New! Patent Pening
2 BSS Series next-generation compact ball screws offer quiet, high-speerformance, now available in stanar stock. BSS Series next-generation compact ball screws incorporate the new ball recirculation system an offer quiet, highspee performance. In orer to respon quickly to a wie range of nees, NSK keeps these ball screws in stanar stock as the ompact Series. he exceptionally high performance ball screws are reay for use in a variety of fiels such as semiconuctor manufacturing equipment, D manufacturing equipment, chip mounting equipment, measuring apparatus, an meical equipment. ompact Series omparison of conventional Series an ompact Series 13 mm more compact (Shaft 2, lea 1) xample of reference number: PSS 2 N1D 51 1 eatures B less noise he noise level of ball screws has been reuce by B, about half of what is sense by the ear. Ball screws subsequently prouce a quieter an gentler soun. 1% 3% more compact ball nut he outsie of the ball nut is as much as 3% smaller than those of NSK conventional proucts. his contributes to more compact esign of all sorts of equipment an evices such as thinner Y tables. High-spee operation of up to 5 min -1 he new ball screws offer 1. times faster rotational spee than conventional ball screws. hey hanle spees up to 5 min -1. his capability ramatically expans the range of service conitions. Note: Please refer to the imension table for etails of permissible rotational spee. rease fitting provie as stanar equipment he new ball screws are stanarly equippe with a grease fitting (M5.8). ubrication ports arrovie in 2 places to facilitate maintenance. he ball screws can be easily connecte to an integrate lubrication system. New type of contact seal new moel high-performance contact seal minimizes grease ispersion an helps to maintain a clean work environment. ow-profile esign he low-profile support units especially compatible with the compact series are available for uniquely space-saving esign. xisting support unit New low-profile support unit ompact Series ccuracy grae: 5 (mm) Ball screw 3 (mm) NSK control No. ea (mm) s much as 3% more compact ompact & Si lent Noise level B () Shaft ea 5 Shaft ea 1 Noise ata Shaft ea 5 onventional Series ompact Series eeing spee, V (m/min) (Microphone was positione at a istance of 4 mm for all noise measurements.) pplication: ombination of an lea are shown in the table. Shaft 1 2 ea onventional Series Other support units are also available. See last page of catalog for etails. Specifications Shaft, lea 5 13 mm more compact (Shaft 2, lea 1) ccuracy grae: 5 class is available. xial play: (oversize ball preloa) onsult with NSK for information on surface treatment. ixe sie support unit WBK8-1B WBK8-1B WBK-1B WBK1-1B WBK-1B ompact Series Simple sie support unit WBK8S-1B WBK8S-1B WBKS-1B WBKS-1B WBK2-1 WBK2S-1 2
3 3 1 ea 5, (8.7) ross-section g 44 1 (quenching range) M h ea 5, 1, 2, g.1 (8.7) 1 (quenching range) (8) M h (Oil hole, M5.8 tap) (Oil hole, M5.8 tap).1 (Oil hole, M5.8 tap) 3 3 (Oil hole, M5.8 tap) ross-section Basic loa ratings (N) ea a a Basic loa ratings (N) a rill thru 8 c bore, 4.5 epth Ball /screw root 2./8.2 ccuracy grae/axial play 5/ actory pre-packe grease NSK grease PS2 PSSN1D PSSN1D PSSN1D PSSN1D PSSN1D PSSN1D PSSN1D PSSN1D PSSN1D Ball /screw root 2./1.2 ccuracy grae/axial play 5/ actory pre-packe grease NSK grease PS2 a PSS5N1D PSS5N1D PSS5N1D PSS5N1D PSS5N1D PSS5N1D PSS1N1D PSS1N1D PSS1N1D PSS1N1D PSS1N1D PSS2N1D PSS2N1D PSS2N1D PSS2N1D PSS2N1D PSS3N1D PSS3N1D PSS3N1D PSS3N1D PSS3N1D imensions imensions arget value arget value ea accuracy ea accuracy rror rror 3 Shaft runout, Shaft runout, PD 33 WBK8-1B (square, fixe sie) WBK8S-1B (square, simple sie) WBK8-B (roun, fixe sie) preloa torque (N cm) rill thru 8 c bore, 4.5 epth PD 34 WBK8-1B (square, fixe sie) WBK8S-1B (square, simple sie) WBK8-B (roun, fixe sie) preloa torque (N cm) 1 Permissible rotational spee (min 1 ) 2 ixe-simple Inicates ball screw preloa control value. bout 2. N cm of torque is ae ue to high performance seal. 2. ontact NSK if permissible rotational spee is to be exceee. 3. Service temperature range is -2 to 8. ea Inicates ball screw preloa control value. bout 2. N cm of torque is ae ue to high performance seal. 2. ontact NSK if permissible rotational spee is to be exceee. 3. Service temperature range is -2 to 8. Permissible rotational spee (min 1 ) 2 ixe-simple NSK Ball s for stanar stock : 1 an ompact Series 4
4 5 ea 5, 1 ea 2, 3 ea I M1 1. I Basic loa ratings (N) a (quenching range) (8.7) a PSS5N1D PSS5N1D PSS5N1D PSS5N1D PSS5N1D PSS5N1D PSS5N1D PSS1N1D PSS1N1D PSS1N1D PSS1N1D PSS1N1D PSS1N1D PSS1N1D PSS1N1D PSS1N1D g M h. (Oil hole, M5.8 tap) (Oil hole, M5.8 tap) ross-section rill thru 9.5 c bore, 5.5 epth PD M (quenching range) 2 (8.7) 32 g WBK-1B (square, fixe sie) Ball /screw root /. WBKS-1B (square, simple sie) ccuracy grae/axial play 5/ WBK- (roun, fixe sie) actory pre-packe grease NSK grease R3 4 WBK1-1B (square, fixe sie) WBK1- (roun, fixe sie) imensions ea accuracy Permissible rotational eft en Shaft runout preloa torque arget value rror (opposite 1 - (N cm) 1 spee (min 1 ) 2 ixe-simple ixe-ixe riven sie) Inicates ball screw preloa control value. bout 2. N cm of torque is ae ue to high performance seal. 2. ontact NSK if permissible rotational spee is to be exceee. 3. Service temperature range is -2 to WBK 1-1B an WBK 1- are for shape I..17 M h. (Oil hole, M5.8 tap) (Oil hole, M5.8 tap) ross-section rill thru 9.5 c bore, 5.5 epth PD 43 NSK Ball s for stanar stock : 3 ea Basic loa ratings (N) a a PSS2N1D PSS2N1D PSS2N1D PSS2N1D PSS2N1D PSS2N1D PSS2N1D PSS2N1D PSS2N1D PSS3N1D PSS3N1D PSS3N1D PSS3N1D PSS3N1D PSS3N1D PSS3N1D PSS3N1D PSS3N1D Ball /screw root 3.175/.2 ccuracy grae/axial play 5/ actory pre-packe grease NSK grease R3 imensions arget value ea accuracy rror Shaft runout WBK-1B (square, fixe sie) WBKS-1B (square, simple sie) WBK- (roun, fixe sie) 4 WBK1-1B (square, fixe sie) WBK1- (roun, fixe sie) preloa torque Permissible rotational eft en (N cm) 1 spee (min 1 ) 2 (opposite ixe-simple ixe-ixe riven sie) I Inicates ball screw preloa control value. bout 2. N cm of torque is ae ue to high performance seal. 2. ontact NSK if permissible rotational spee is to be exceee. 3. Service temperature range is -2 to WBK 1-1B an WBK 1- are for shape I. ompact Series
5 7 2 ea 5, 1, 2, 3, 4, I.17 M (8.7) 1 (quenching range) g.9. ea Basic loa ratings (N) a a 1 - PSSN1D PSSN1D PSSN1D PSSN1D PSSN1D PSSN1D PSSN1D PSSN1D PSS21N1D PSS21N1D PSS21N1D PSS21N1D PSS21N1D PSS21N1D PSS21N1D PSS21N1D PSS21N1D PSS22N1D PSS22N1D PSS22N1D PSS22N1D PSS22N1D PSS22N1D PSS22N1D PSS22N1D PSS22N1D PSS23N1D PSS23N1D PSS23N1D PSS23N1D PSS23N1D PSS23N1D PSS23N1D PSS23N1D PSS23N1D PSS24N1D PSS24N1D PSS24N1D PSS24N1D PSS24N1D PSS24N1D PSS24N1D PSS24N1D PSS24N1D PSS2N1D PSS2N1D PSS2N1D PSS2N1D PSS2N1D PSS2N1D PSS2N1D PSS2N1D PSS2N1D Ball /screw root 3.175/17.2 ccuracy grae/axial play 5/ actory pre-packe grease NSK grease R3 imensions arget value ea accuracy M 1. rror. h (Oil hole, M5.8 tap) 38 (Oil hole, M5.8 tap) ross-section - Shaft runout rill thru c bore,.5 epth PD 49 WBK-1B (square, fixe sie) WBKS-1B (square, simple sie) WBK- (roun, fixe sie) Permissible rotational eft en preloa torque (N cm) 1 spee (min 1 ) 2 (opposite ixe-simple ixe-ixe riven sie) I Inicates ball screw preloa control value. bout 3. N cm of torque is ae ue to high performance seal. 2. ontact NSK if permissible rotational spee is to be exceee. 3. Service temperature range is -2 to 8. NSK Ball s for stanar stock : 2 ompact Series 8
6 9 ompact Series 1 ea 5, 1, 2,, 3, I M ea (quenching range) g Basic loa ratings (N) a a 1 - (8.7) 2 PSS5N1D PSS5N1D PSS5N1D PSS5N1D PSS5N1D PSS5N1D PSS5N1D PSS5N1D PSS1N1D PSS1N1D PSS1N1D PSS1N1D PSS1N1D PSS1N1D PSS1N1D PSS1N1D PSS2N1D PSS2N1D PSS2N1D PSS2N1D PSS2N1D PSS2N1D PSS2N1D PSS2N1D PSSN1D PSSN1D PSSN1D PSSN1D PSSN1D PSSN1D PSSN1D PSSN1D PSS3N1D PSS3N1D PSS3N1D PSS3N1D PSS3N1D PSS3N1D PSS3N1D PSS3N1D PSS5N1D PSS5N1D PSS5N1D PSS5N1D PSS5N1D PSS5N1D PSS5N1D PSS5N1D M2 1. Ball /screw root 3.175/22.2 ccuracy grae/axial play 5/ actory pre-packe grease NSK grease R3 imensions arget value ea accuracy rror. h. 3.5 (Oil hole, M5.8 tap) (Oil hole, M5.8 tap) Shaft runout ross-section - -.rill thru PD 51 PD 47 WBK2-1 (square, fixe sie) WBK2S-1 (square, simple sie) WBK2- (roun, fixe sie) preloa torque Permissible rotational eft en (N cm) 1 spee (min 1 ) 2 (opposite ixe-simple ixe-ixe riven sie) I Inicates ball screw preloa control value. bout 3. N cm of torque is ae ue to high performance seal. 2. ontact NSK if permissible rotational spee is to be exceee. 3. Service temperature range is -2 to 8. NSK Ball s for stanar stock :
7 ow-profile Support Units for ompact Series Design (1) If a ball screw of which left en (opposite riven sie) is the shape I, an is supporte with the fixe-fixe supporting metho, you shoul be aware that the operating life of support bearings may rop ue to thermal expansion of the screw, epening on usage conitions. In this case, you shoul consier a structure that can absorb thermal expansion of the screw if necessary. Please consult with NSK for a etaile examination. (2) If using an NSK linear guie, the maximum spee of a linear guie of stanar specifications uner orinary conitions is limite to 1 m/min. linear guie with high-spee specifications is available if higher operating spee is require. ontact NSK for further information. or general precautions concerning ball screws, please see NSK atalog No. 3 Precision Machine omponents. Usage an hanling Ball screws arrecision proucts an shoul be treate as follows: [ubrication] (1) ompact Series ball screws aracke an coate with lubrication grease at the factory, an require no further lubrication uner orinary circumstances. If the surface of the grease becomes contaminate with irt an metal power uner operation, clean it with white kerosene an replenish with new grease of the same kin through the oil hole (grease nipple) on the ball nut. voi mixing ifferent types of grease. (2) ubricant shoul be checke after the first 2 to 3 months of operation. If excessively irty, we recommen you wipe away the ol grease an replenish with a generous quantity of grease. fter that, grease shoul be checke an replenishe once a year uner orinary circumstances, but therio may vary epening upon the service environment. [Hanling] (1) Never isassemble the ball screw, otherwise irt may contaminate the insie of the unit an affect precision or result in equipment failure. (2) ompact Series ball screws incorporate a new ball re-circulation system. onsequently, only NSK authorizlants shoul conuct isassembly an reassembly. If the nut accientally comes off the screw or is roppe, NSK will check precision, problems or perform repairs at your expense. When the ball screw is erecte upright, the screw or nut coul fall by force of its own weight an result in injury. If roppe, the ball grooves coul be ente or re-circulation parts amage, resulting in loss of function. his woul require the ball screw to be inspecte by NSK. If so, be sure to sen the ball screw to NSK an we will check it for a fee. [Usage] (1) Ball screws shoul be use in a clean environment. he ball screws shoul brovie with a ust cover to prevent the entry of ebris such as ust an metal power. If foreign matter is allowe to contaminate the ball screw, this coul not only cause the ball screw to lose some of its function, but also result in clogging an amaging the re-circulation system parts, or cause the table to fall or a similar serious accient. (2) ompact Series ball screws are esigne to be use in a service temperature environment of 8 or lower. Do not allow the service temperature limit to be exceee. In some cases, using ball screws in temperatures above 8 might lea to amage of re-circulation system parts or seal parts. ontact NSK if 8 must be exceee. ompact Series options Precautions onsult with NSK for information about optional specification not given in the catalog such as en machining, reverse irection ball nut, alternative grease, surface treatment, an alternativreloa. heck lubrication Do not isassemble Beware of ropping Dust control 8 Max aution max. temperature NSK has evelope a series of low-profile support unit to be use with the ball screws of compact series. combination of the ball screw an the support unit offers a compact esign for ownsizing of many kins of machinery. eatures he low-profile support units offer the low center height construction suite for the compact series ball screws. Prouct configuration ll parts require for ball screw mounting arrovie as a set (see the table below). he bearing housing of support unit for fixe sie contains a built-in angular contact ball bearings an oil seal an shoul not be isassemble. ixe sie support unit ➅ ➄ Simple sie support unit ➂ ➁ ➀ ➀ xample: WBK 8 S - 1 B Support unit prouct coe size coe (internal bore of bearing) ➁ ➂➃ Part No Part Bearing housing ngular contact ball bearing, Oil seal over Spacer ock nut Setscrew Set piece (pa) Deep groove ball bearing Snap ring Remarks (surface treatment, grease) PS2 omes with support sie, PS2 Other machine screws are either mae of stainless steel or coate with triiron tetroxie film. Part No. Part Bearing housing Deep groove ball bearing Snap ring Remarks (surface treatment, grease) PS2 No coe or : conventional stanar support unit B: ow-profile support unit 1: Square type, : Roun type Mounting coe No coe: ixe sie support unit S: Simple sie support unit or simple sie support units, please note that size coes of or less o not represent internal bores of bearing.
8 ow-profile Support Units for ompact Series Square type an Roun type ompact Series ixe sie support unit (square type) ixe sie support unit (roun type) S K P Q 4- rill thru Yc bore, epth Z PD W.5 1 D B N J K M W ixe sie support unit H Section S (WBK8 ) 2- rill thru Yc bore, epth Z Q P Q Section S (WBK2) 4- rill thru Yc bore, epth Z J H N Yc bore, epth Z 2- rill thru Specifications of support unit B 2 1 D g 1 U ixe sie support unit (square type) 1 B D H J K N P Q W Y Z M 1 WBK M8 1 WBK8-1B M8 1 WBK1-1B M1 1 WBK M 1 WBK-1B M 1 2 WBK M 1 WBK-1B M 1 WBK M2 1 Use support unit for fixing sie for opposite rive sie of. Remarks 1. Mount to the base using sie as the reference. 2. ighten the setscrew after tightening the lock nut an ajusting. 3. Insert the set piece an then tighten the setscrew. H J M Mounting example 1 Mounting example 2 ixe sie support unit (roun type) 1 D H J K N P Q U W Y Z M 1 WBK WBK8-B WBK WBK WBK WBK Use support unit for fixing sie for opposite rive sie of. Remarks 1. ighten the setscrew after tightening the lock nut an ajusting. 2. Insert the set piece an then tighten the setscrew. /2 / M M M M M 1. 1 M 1 Simple sie support unit D.5 B 1 2 WBK8S-1 WBK8S-1B WBKS-1 WBKS-1B WBKS-1 WBKS-1B WBK2S-1 W Simple sie support unit R/2 R/2 R Simple sie support unit 2 B D R W Y Z Support unit reference number WBK8-1 (square type) WBK8- (roun type) WBK8-1B (square low-profile type) WBK8-B (roun type) WBK1-1B (square low-profile type) WBK1- (roun type) WBK-1 (square type) WBK-1B (square low-profile type) WBK- (roun type) WBK-1 (square type) WBK-1B (square low-profile type) WBK- (roun type) WBK2-1 (square type) WBK2- (roun type) ixe sie support unit xial loa Basic loa ratings a [N] oa limit [N] Maximum starting torque [N cm] ightening torque [N cm] ock nut Setscrew 49 9 (M3) (M4) (M4) (M4) (M4) Support unit reference number WBK8S-1 WBK8S-1B WBKS-1 WBKS-1B WBKS-1 WBKS-1B WBK2S-1 Simple sie support unit Bearing number ZZ ZZ 2ZZ 24ZZ Raial loa Basic loa ratings [N] Remarks 1. Mount to the base using sie B as the reference. Use support unit for fixing sie for opposite rive sie of
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