• WON ST Compact Ball Spline WSPF Series, Round Flange Type
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WON ST Compact Ball Spline WSPF Series, Round Flange Type

WON ST Compact Ball Spline WSPF Series, Round Flange Type

Compact ball spline with a precision-ground Gothic-arch spline shaft and ball nut that carries radial and moment loads and transmits rotational torque with one nut; round flange nut.

Key features

  • Round flange nut for easy installation
  • Two rows of Gothic-arch grooves with 4-point ball contact
  • Transmits torque while bearing radial and moment loads with one nut
  • Preload possible for zero rotational clearance and high rigidity
  • Rated load about ten times that of a ball bushing of equal shaft diameter

Specifications

Nut type Round flange nut
Shaft type options S solid / H hollow
Clearance options CL no preload / CM standard / CT light preload
Precision options Normal / H precision / P super
Material options Standard / M stainless (nut and shaft)
WSPF5 Shaft diameter d: 5 mm | Nut outer diameter D: 10 mm | Nut length L1: 17.5 mm | Flange diameter D1: 23 mm | Bolt PCD: 17 mm | C (dynamic): 588 N | C0 (static): 637 N | T (dynamic torque): 1.764 N·m | T0 (static torque): 1.96 N·m | Nut mass: 8.9 g | Shaft mass: 14.9 g/100mm | Max. shaft length: 200 mm
WSPF6 Shaft diameter d: 6 mm | Nut outer diameter D: 12 mm | Nut length L1: 20.6 mm | Flange diameter D1: 25 mm | Bolt PCD: 19 mm | C (dynamic): 715.4 N | C0 (static): 853 N | T (dynamic torque): 2.45 N·m | T0 (static torque): 3.038 N·m | Nut mass: 13.9 g | Shaft mass: 19 g/100mm | Max. shaft length: 300 mm
WSPF8 Shaft diameter d: 8 mm | Nut outer diameter D: 15 mm | Nut length L1: 24.4 mm | Flange diameter D1: 28 mm | Bolt PCD: 22 mm | C (dynamic): 1176 N | C0 (static): 1372 N | T (dynamic torque): 5.488 N·m | T0 (static torque): 6.174 N·m | Nut mass: 23.5 g | Shaft mass: 39 g/100mm | Max. shaft length: 500 mm
WSPF10 Shaft diameter d: 10 mm | Nut outer diameter D: 19 mm | Nut length L1: 29.6 mm | Flange diameter D1: 36 mm | Bolt PCD: 28 mm | C (dynamic): 1862 N | C0 (static): 2156 N | T (dynamic torque): 10.78 N·m | T0 (static torque): 12.74 N·m | Nut mass: 45 g | Shaft mass: 60.5 g/100mm | Max. shaft length: 600 mm
WSPF12 Shaft diameter d: 12 mm | Nut outer diameter D: 21 mm | Nut length L1: 34.7 mm | Flange diameter D1: 38 mm | Bolt PCD: 30 mm | C (dynamic): 2156 N | C0 (static): 2646 N | T (dynamic torque): 14.70 N·m | T0 (static torque): 18.62 N·m | Nut mass: 59 g | Shaft mass: 87.5 g/100mm | Max. shaft length: 800 mm
WSPF15 Shaft diameter d: 13.6 mm | Nut outer diameter D: 23 mm | Nut length L1: 40 mm | Flange diameter D1: 40 mm | Bolt PCD: 32 mm | C (dynamic): 4214 N | C0 (static): 6076 N | T (dynamic torque): 31.36 N·m | T0 (static torque): 45.08 N·m | Nut mass: 77 g | Shaft mass: 111 g/100mm | Max. shaft length: 1000 mm
WSPF20 Shaft diameter d: 18.2 mm | Nut outer diameter D: 30 mm | Nut length L1: 50 mm | Flange diameter D1: 46 mm | Bolt PCD: 38 mm | C (dynamic): 6566 N | C0 (static): 9016 N | T (dynamic torque): 65.66 N·m | T0 (static torque): 90.16 N·m | Nut mass: 150 g | Shaft mass: 202 g/100mm | Max. shaft length: 1000 mm
WSPF25 Shaft diameter d: 22.6 mm | Nut outer diameter D: 37 mm | Nut length L1: 60 mm | Flange diameter D1: 57 mm | Bolt PCD: 47 mm | C (dynamic): 11196 N | C0 (static): 14294 N | T (dynamic torque): 138.94 N·m | T0 (static torque): 177.93 N·m | Nut mass: 255 g | Shaft mass: 310 g/100mm | Max. shaft length: 1200 mm
WSPF30 Shaft diameter d: 27.2 mm | Nut outer diameter D: 45 mm | Nut length L1: 70 mm | Flange diameter D1: 65 mm | Bolt PCD: 54 mm | C (dynamic): 15349 N | C0 (static): 19392 N | T (dynamic torque): 230.91 N·m | T0 (static torque): 291.88 N·m | Nut mass: 476 g | Shaft mass: 450 g/100mm | Max. shaft length: 1200 mm
WSPF40 Shaft diameter d: 37.2 mm | Nut outer diameter D: 60 mm | Nut length L1: 100 mm | Flange diameter D1: 93 mm | Bolt PCD: 73 mm | C (dynamic): 21291 N | C0 (static): 31587 N | T (dynamic torque): 425.83 N·m | T0 (static torque): 631.75 N·m | Nut mass: 962 g | Shaft mass: 808 g/100mm | Max. shaft length: 1200 mm
Ball SplinesWON ST
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WON ST Compact Ball Spline WSPF Series, Round Flange Type

Brand WON ST·Ball Splines

Available part numbers (10)

WSPF5, WSPF6, WSPF8, WSPF10, WSPF12, WSPF15, WSPF20, WSPF25, WSPF30, WSPF40

How to order

Send the WON ST 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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WSPF5Shaft diameter d: 5 mm | Nut outer diameter D: 10 mm | Nut length L1: 17.5 mm | Flange diameter D1: 23 mm | Bolt PCD: 17 mm | C (dynamic): 588 N | C0 (static): 637 N | T (dynamic torque): 1.764 N·m | T0 (static torque): 1.96 N·m | Nut mass: 8.9 g | Shaft mass: 14.9 g/100mm | Max. shaft length: 200 mm
WSPF6Shaft diameter d: 6 mm | Nut outer diameter D: 12 mm | Nut length L1: 20.6 mm | Flange diameter D1: 25 mm | Bolt PCD: 19 mm | C (dynamic): 715.4 N | C0 (static): 853 N | T (dynamic torque): 2.45 N·m | T0 (static torque): 3.038 N·m | Nut mass: 13.9 g | Shaft mass: 19 g/100mm | Max. shaft length: 300 mm
WSPF8Shaft diameter d: 8 mm | Nut outer diameter D: 15 mm | Nut length L1: 24.4 mm | Flange diameter D1: 28 mm | Bolt PCD: 22 mm | C (dynamic): 1176 N | C0 (static): 1372 N | T (dynamic torque): 5.488 N·m | T0 (static torque): 6.174 N·m | Nut mass: 23.5 g | Shaft mass: 39 g/100mm | Max. shaft length: 500 mm
WSPF10Shaft diameter d: 10 mm | Nut outer diameter D: 19 mm | Nut length L1: 29.6 mm | Flange diameter D1: 36 mm | Bolt PCD: 28 mm | C (dynamic): 1862 N | C0 (static): 2156 N | T (dynamic torque): 10.78 N·m | T0 (static torque): 12.74 N·m | Nut mass: 45 g | Shaft mass: 60.5 g/100mm | Max. shaft length: 600 mm
WSPF12Shaft diameter d: 12 mm | Nut outer diameter D: 21 mm | Nut length L1: 34.7 mm | Flange diameter D1: 38 mm | Bolt PCD: 30 mm | C (dynamic): 2156 N | C0 (static): 2646 N | T (dynamic torque): 14.70 N·m | T0 (static torque): 18.62 N·m | Nut mass: 59 g | Shaft mass: 87.5 g/100mm | Max. shaft length: 800 mm
WSPF15Shaft diameter d: 13.6 mm | Nut outer diameter D: 23 mm | Nut length L1: 40 mm | Flange diameter D1: 40 mm | Bolt PCD: 32 mm | C (dynamic): 4214 N | C0 (static): 6076 N | T (dynamic torque): 31.36 N·m | T0 (static torque): 45.08 N·m | Nut mass: 77 g | Shaft mass: 111 g/100mm | Max. shaft length: 1000 mm
WSPF20Shaft diameter d: 18.2 mm | Nut outer diameter D: 30 mm | Nut length L1: 50 mm | Flange diameter D1: 46 mm | Bolt PCD: 38 mm | C (dynamic): 6566 N | C0 (static): 9016 N | T (dynamic torque): 65.66 N·m | T0 (static torque): 90.16 N·m | Nut mass: 150 g | Shaft mass: 202 g/100mm | Max. shaft length: 1000 mm
WSPF25Shaft diameter d: 22.6 mm | Nut outer diameter D: 37 mm | Nut length L1: 60 mm | Flange diameter D1: 57 mm | Bolt PCD: 47 mm | C (dynamic): 11196 N | C0 (static): 14294 N | T (dynamic torque): 138.94 N·m | T0 (static torque): 177.93 N·m | Nut mass: 255 g | Shaft mass: 310 g/100mm | Max. shaft length: 1200 mm
WSPF30Shaft diameter d: 27.2 mm | Nut outer diameter D: 45 mm | Nut length L1: 70 mm | Flange diameter D1: 65 mm | Bolt PCD: 54 mm | C (dynamic): 15349 N | C0 (static): 19392 N | T (dynamic torque): 230.91 N·m | T0 (static torque): 291.88 N·m | Nut mass: 476 g | Shaft mass: 450 g/100mm | Max. shaft length: 1200 mm
WSPF40Shaft diameter d: 37.2 mm | Nut outer diameter D: 60 mm | Nut length L1: 100 mm | Flange diameter D1: 93 mm | Bolt PCD: 73 mm | C (dynamic): 21291 N | C0 (static): 31587 N | T (dynamic torque): 425.83 N·m | T0 (static torque): 631.75 N·m | Nut mass: 962 g | Shaft mass: 808 g/100mm | Max. shaft length: 1200 mm

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