• NSK WBK-31 Ball Screw Support Units for Machine Tools (DF, DFD, DFF)
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NSK WBK-31 Ball Screw Support Units for Machine Tools (DF, DFD, DFF)

NSK WBK-31 Ball Screw Support Units for Machine Tools (DF, DFD, DFF)

NSK WBK-31 high-load ball screw support units for machine tools with preloaded TAC thrust angular contact bearings in DF, DFD or DFF arrangement, shaft 17 to 40 mm.

Key features

  • Pre-assembled, preload-controlled TAC bearing set
  • DF (2 rows), DFD (3 rows) or DFF (4 rows) arrangements
  • Dust seals, collars, shims and lock nut included
  • Grease packed; ready to install
  • Lock nut also sold separately

Specifications

Series WBK-31
Bearing TAC thrust angular contact
Shaft range 17 - 40 mm
Lubrication Grease packed
Source NSK Super Precision Bearings, p. 114-115
WBK17DF-31 d: 17 mm | D: 70 mm | L: 60 mm | Ca: 21,900 N | Max axial load: 26,600 N | Rigidity: 750 N/um
WBK20DF-31 d: 20 mm | D: 70 mm | L: 60 mm | Ca: 21,900 N | Max axial load: 26,600 N | Rigidity: 750 N/um
WBK25DF-31 d: 25 mm | D: 85 mm | L: 66 mm | Ca: 28,500 N | Max axial load: 40,500 N | Rigidity: 1000 N/um
WBK25DFD-31 d: 25 mm | D: 85 mm | L: 81 mm | Ca: 46,500 N | Max axial load: 81,500 N | Rigidity: 1470 N/um
WBK30DF-31 d: 30 mm | D: 85 mm | L: 66 mm | Ca: 29,200 N | Max axial load: 43,000 N | Rigidity: 1030 N/um
WBK30DFD-31 d: 30 mm | D: 85 mm | L: 81 mm | Ca: 47,500 N | Max axial load: 86,000 N | Rigidity: 1520 N/um
WBK35DF-31 d: 35 mm | D: 95 mm | L: 66 mm | Ca: 31,000 N | Max axial load: 50,000 N | Rigidity: 1180 N/um
WBK35DFD-31 d: 35 mm | D: 95 mm | L: 81 mm | Ca: 50,500 N | Max axial load: 100,000 N | Rigidity: 1710 N/um
WBK35DFF-31 d: 35 mm | D: 95 mm | L: 96 mm | Ca: 50,500 N | Max axial load: 100,000 N | Rigidity: 2350 N/um
WBK40DF-31 d: 40 mm | D: 95 mm | L: 66 mm | Ca: 31,500 N | Max axial load: 52,000 N | Rigidity: 1230 N/um
WBK40DFD-31 d: 40 mm | D: 95 mm | L: 81 mm | Ca: 51,500 N | Max axial load: 104,000 N | Rigidity: 1810 N/um
WBK40DFF-31 d: 40 mm | D: 95 mm | L: 96 mm | Ca: 51,500 N | Max axial load: 104,000 N | Rigidity: 2400 N/um
Ball ScrewsNSK
12 product codes available in this family
Sourced direct from KoreaExport-ready supplyCompetitive pricing
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NSK WBK-31 Ball Screw Support Units for Machine Tools (DF, DFD, DFF)

Brand NSK·Ball Screws

Available part numbers (12)

WBK17DF-31, WBK20DF-31, WBK25DF-31, WBK25DFD-31, WBK30DF-31, WBK30DFD-31, WBK35DF-31, WBK35DFD-31, WBK35DFF-31, WBK40DF-31 + 2 more — see full table ↓

How to order

Send the NSK part numbers and quantities through our RFQ form or to info@prosourcemro.com. We confirm price, availability and lead time within 1 business day — no account needed.

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Product codes & specifications
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Product codeSpec
WBK17DF-31d: 17 mm | D: 70 mm | L: 60 mm | Ca: 21,900 N | Max axial load: 26,600 N | Rigidity: 750 N/um
WBK20DF-31d: 20 mm | D: 70 mm | L: 60 mm | Ca: 21,900 N | Max axial load: 26,600 N | Rigidity: 750 N/um
WBK25DF-31d: 25 mm | D: 85 mm | L: 66 mm | Ca: 28,500 N | Max axial load: 40,500 N | Rigidity: 1000 N/um
WBK25DFD-31d: 25 mm | D: 85 mm | L: 81 mm | Ca: 46,500 N | Max axial load: 81,500 N | Rigidity: 1470 N/um
WBK30DF-31d: 30 mm | D: 85 mm | L: 66 mm | Ca: 29,200 N | Max axial load: 43,000 N | Rigidity: 1030 N/um
WBK30DFD-31d: 30 mm | D: 85 mm | L: 81 mm | Ca: 47,500 N | Max axial load: 86,000 N | Rigidity: 1520 N/um
WBK35DF-31d: 35 mm | D: 95 mm | L: 66 mm | Ca: 31,000 N | Max axial load: 50,000 N | Rigidity: 1180 N/um
WBK35DFD-31d: 35 mm | D: 95 mm | L: 81 mm | Ca: 50,500 N | Max axial load: 100,000 N | Rigidity: 1710 N/um
WBK35DFF-31d: 35 mm | D: 95 mm | L: 96 mm | Ca: 50,500 N | Max axial load: 100,000 N | Rigidity: 2350 N/um
WBK40DF-31d: 40 mm | D: 95 mm | L: 66 mm | Ca: 31,500 N | Max axial load: 52,000 N | Rigidity: 1230 N/um
WBK40DFD-31d: 40 mm | D: 95 mm | L: 81 mm | Ca: 51,500 N | Max axial load: 104,000 N | Rigidity: 1810 N/um
WBK40DFF-31d: 40 mm | D: 95 mm | L: 96 mm | Ca: 51,500 N | Max axial load: 104,000 N | Rigidity: 2400 N/um

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