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Description
Product description
Product overview
Technical data
Technical notes
Fields of application
Bearing units without housing for screw ends in Form 942
| Application | LAS | FEC-F |
| | |
The assembly group Bearing Unit LAS, FEC-F consists of:
- 1 bearing
- 1 slotted nut
Components
End bearings for screw ends
| Form | Version 1) | Size | Bearing assembly | |
| LAS | FEC-F | |||
| d0 x P | Part number | Part number | ||
| 942 | 201 | 20 x 5 | R159A42001 | - |
| 251 | - | R159B42501 | ||
| 252 | 25 x 5 | R159A42501 | - | |
| 253 | 25 x 10 | |||
| 254 | 25 x 5 | - | R159B42501 | |
| 255 | 25 x 10 | |||
| 301 | 30 x 5 | R159A43001 | - | |
| 302 | 30 x 10 | |||
| 350 | 30 x 5 | - | R159B43501 | |
| 351 | 30 x 10 | |||
| 401 | 39 x 5 | R159A44001 | - | |
| 402 | 39 x 10 | |||
| 505 | 39 x 5 | - | R159B45001 | |
| 506 | 39 x 10 | |||
| 503 | 48 x 5 | R159A45001 | - | |
| 504 | 48 x 10 | |||
| 650 | 48 x 5 | - | R159B46501 | |
| 651 | 48 x 10 | |||
| 700 | 60 x 10 | R159A47001 | - | |
| 701 | 60 x 20 | |||
| 652 | 60 x 10 | - | R159B46501 | |
| 653 | 60 x 20 | |||
| 900 | 75 x 10 | R159A49001 | - | |
| 901 | 75 x 20 | |||
| 902 | 75 x 10 | - | R159B49001 | |
| 903 | 75 x 20 | |||
| 1) | The allocation of screw ends to the bearing assemblies is clearly defined by the version. |
Legend
| Symbol | Description |
| d0 | Nominal diameter |
| P | Lead |
Slotted nuts NMA for fixed bearings

Slotted nuts NMA for fixed bearings
- For maximum vibratory loads
- For new designs
Dimensions

| 1) | Undercut form E DIN 509 |
| 2) | Thread undercut 76 short |
Dimensions and technical data
| Form | Version 1) | d0 x P | Dimensions | Keyway as per DIN 6885 | Mp | ||||||||||||||
| Ljf | D1 | L1 | D2 | L2 | D3 | L3 | G1 | LG1 | DR | LR | DF | LF | b | l | t | ||||
| h11 | h7 | h7 | P9 | ||||||||||||||||
| mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | Nm | ||||
| 942 | 201 | 20 x 5 | 131 | 20 | 54 | 18 | 40 | 6 | 15 | M20x1 | 22 | 27 | 7 | 19.2 | 14 | 6 | 36 | 3.5 | 22.9 |
| 251 | 172 | 25 | 87 | 20 | 45 | M25x1,5 | 25 | 34 | 26 | 40 | 28.6 | ||||||||
| 252 | 25 x 5 | 151 | 66 | 24.2 | 14 | 33.3 | |||||||||||||
| 253 | 25 x 10 | 23.7 | 60.5 | ||||||||||||||||
| 254 | 25 x 5 | 172 | 87 | 24.2 | 33.3 | ||||||||||||||
| 255 | 25 x 10 | 23.7 | 60.5 | ||||||||||||||||
| 301 | 30 x 5 | 163 | 30 | 74 | 25 | 50 | M30x1,5 | 24 | 40 | 10 | 29.2 | 17 | 8 | 4 | 45.8 | ||||
| 302 | 30 x 10 | 28.7 | 85.9 | ||||||||||||||||
| 350 | 30 x 5 | 204 | 35 | 108 | 30 | 55 | M35x1,5 | 26 | 45 | 29.2 | 28 | 45 | 54.3 | ||||||
| 351 | 30 x 10 | 28.7 | 108.6 | ||||||||||||||||
| 401 | 39 x 5 | 191 | 40 | 90 | 36 | 60 | M40x1,5 | 54 | 12 | 38.1 | 24.5 | 10 | 50 | 5 | 80.2 | ||||
| 402 | 39 x 10 | 37.7 | 156 | ||||||||||||||||
| 505 | 39 x 5 | 248 | 50 | 137 | 40 | 65 | M50x1,5 | 31 | 62 | 38.1 | 32 | 12 | 91.1 | ||||||
| 506 | 39 x 10 | 37.7 | 175.4 | ||||||||||||||||
| 503 | 48 x 5 | 220 | 106 | 70 | 29 | 47.2 | 22 | 121.3 | |||||||||||
| 504 | 48 x 10 | 46.7 | 237.3 | ||||||||||||||||
| 650 | 48 x 5 | 325 | 65 | 178 | 60 | 100 | M65x2 | 32 | 78 | 18 | 47.2 | 46 | 18 | 90 | 7 | 137.4 | |||
| 651 | 48 x 10 | 46.7 | 279.9 | ||||||||||||||||
| 700 | 60 x 10 | 286 | 70 | 138 | 65 | M70x2 | 33 | 90 | 20 | 58.7 | 50 | 423.8 | |||||||
| 701 | 60 x 20 | 57.7 | 793.8 | ||||||||||||||||
| 652 | 60 x 10 | 325 | 65 | 178 | 60 | M65x2 | 32 | 78 | 18 | 58.7 | 39 | 408.1 | |||||||
| 653 | 60 x 20 | 57.7 | 771.4 | ||||||||||||||||
| 900 | 75 x 10 | 342 | 90 | 169 | 85 | 120 | M90x2 | 38 | 108 | 25 | 73.7 | 59 | 22 | 100 | 9 | 656.2 | |||
| 901 | 75 x 20 | 72.7 | 1250 | ||||||||||||||||
| 902 | 75 x 10 | 404 | 233 | 36 | 73.7 | 656.2 | |||||||||||||
| 903 | 75 x 20 | 72.7 | 1250 | ||||||||||||||||
| 1) | The allocation of screw ends to the bearing assemblies is clearly defined by the version. |
Legend
| Symbol | Description | Unit |
| d0 | Nominal diameter | |
| P | Lead (R = right-hand) | |
| Mp | Maximum permissible drive torque (precondition: no radial load at drive journal) | Nm |
Project planning information
Calculation
Mounting
Design notes, installation
Accessories
Bearing assembly LAS

Bearing assembly LAS
- The bearing assembly consists of:
- Angular-contact ball bearing LGS as per DIN 628 (not available as a separate part)
- Slotted nut NMA
- Suitable for screw ends form 112, 122, 132, 142, 512, 532, 812, 822, 832, 842, 912, 922, 932, 942
Bearing assembly FEC-F

Bearing assembly FEC-F
- The bearing assembly consists of:
- precision flanged housing made of steel
- Angular-contact ball bearing LGS
- Slotted nut NMB
- Suitable for screw ends form 132, 142, 532, 832, 842, 932, 942
Bearing assembly LAS
BASA

Bearing assembly LAS
BASA
- The fixed bearing consists of:
- Angular-contact ball bearing LGS as per DIN 628 (not available as a separate part)
- Slotted nut NMA
- Suitable for screw ends in Forms 81, 81A, 82, 82A
Bearing assembly LAS
PLSA

Bearing assembly LAS
PLSA
Certification
Directives and standards
Safety Instructions
Required and supplementary documentation
For further instructions and information, please refer to the documentation for this product.
You can find PDF files of these documents on the Internet at www.boschrexroth.com/mediadirectory.
We would also be happy to send you the documents that you want.
If you are unsure about using this product, please contact Bosch Rexroth.
Notes
Downloads
| Planetary Screw Assemblies Manual | R320103883 | 2011-06-01 | English, French, German, Italian | PDF | 974k Product Groups: Linear Screw Assemblies | |
| Catalog screw assemblies Catalog | R999001185 | 2021-04-01 | English | PDF | 30.7MB Product Groups: Ball Screw Assemblies, Planetary Screw Assemblies Only available as PDF - Ball screw assemblies BASA/Planetary screw assemblies PLSA |









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