• WON ST Compact Ball Spline WSPTF Series, Round Flange Type with Internal Retainer
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WON ST Compact Ball Spline WSPTF Series, Round Flange Type with Internal Retainer

WON ST Compact Ball Spline WSPTF Series, Round Flange Type with Internal Retainer

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 with internal retainer.

Key features

  • Round flange nut for easy installation
  • Retainer placed inside the nut
  • 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

Specifications

Nut type Round flange nut with internal retainer
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)
WSPTF6 Shaft diameter d: 6 mm | Nut outer diameter D: 14 mm | Nut length L1: 25 mm | Flange diameter D1: 30 mm | Bolt PCD: 22 mm | C (dynamic): 1176 N | C0 (static): 2156 N | T (dynamic torque): 0.98 N·m | T0 (static torque): 1.96 N·m | Nut mass: 37.2 g | Shaft mass: 19 g/100mm | Max. shaft length: 300 mm
WSPTF8 Shaft diameter d: 8 mm | Nut outer diameter D: 16 mm | Nut length L1: 25 mm | Flange diameter D1: 32 mm | Bolt PCD: 24 mm | C (dynamic): 1470 N | C0 (static): 2548 N | T (dynamic torque): 1.96 N·m | T0 (static torque): 2.94 N·m | Nut mass: 39.5 g | Shaft mass: 39 g/100mm | Max. shaft length: 500 mm
WSPTF10 Shaft diameter d: 10 mm | Nut outer diameter D: 21 mm | Nut length L1: 33 mm | Flange diameter D1: 42 mm | Bolt PCD: 32 mm | C (dynamic): 2842 N | C0 (static): 4900 N | T (dynamic torque): 3.92 N·m | T0 (static torque): 7.84 N·m | Nut mass: 64.2 g | Shaft mass: 60.5 g/100mm | Max. shaft length: 600 mm
WSPTF12 Shaft diameter d: 12 mm | Nut outer diameter D: 24 mm | Nut length L1: 36 mm | Flange diameter D1: 44 mm | Bolt PCD: 33 mm | C (dynamic): 3528 N | C0 (static): 5782 N | T (dynamic torque): 5.88 N·m | T0 (static torque): 10.78 N·m | Nut mass: 124.7 g | Shaft mass: 87.5 g/100mm | Max. shaft length: 800 mm
WSPTF15 Shaft diameter d: 13.6 mm | Nut outer diameter D: 31 mm | Nut length L1: 50 mm | Flange diameter D1: 51 mm | Bolt PCD: 40 mm | C (dynamic): 7056 N | C0 (static): 12642 N | T (dynamic torque): 31.36 N·m | T0 (static torque): 34.30 N·m | Nut mass: 265.7 g | Shaft mass: 111 g/100mm | Max. shaft length: 1000 mm
WSPTF20 Shaft diameter d: 18.2 mm | Nut outer diameter D: 35 mm | Nut length L1: 63 mm | Flange diameter D1: 58 mm | Bolt PCD: 45 mm | C (dynamic): 10192 N | C0 (static): 17836 N | T (dynamic torque): 56.84 N·m | T0 (static torque): 55.86 N·m | Nut mass: 392.5 g | Shaft mass: 202 g/100mm | Max. shaft length: 1000 mm
Ball SplinesWON ST
6 product codes available in this family
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WON ST Compact Ball Spline WSPTF Series, Round Flange Type with Internal Retainer

Brand WON ST·Ball Splines

Available part numbers (6)

WSPTF6, WSPTF8, WSPTF10, WSPTF12, WSPTF15, WSPTF20

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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Product codes & specifications
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Product codeSpec
WSPTF6Shaft diameter d: 6 mm | Nut outer diameter D: 14 mm | Nut length L1: 25 mm | Flange diameter D1: 30 mm | Bolt PCD: 22 mm | C (dynamic): 1176 N | C0 (static): 2156 N | T (dynamic torque): 0.98 N·m | T0 (static torque): 1.96 N·m | Nut mass: 37.2 g | Shaft mass: 19 g/100mm | Max. shaft length: 300 mm
WSPTF8Shaft diameter d: 8 mm | Nut outer diameter D: 16 mm | Nut length L1: 25 mm | Flange diameter D1: 32 mm | Bolt PCD: 24 mm | C (dynamic): 1470 N | C0 (static): 2548 N | T (dynamic torque): 1.96 N·m | T0 (static torque): 2.94 N·m | Nut mass: 39.5 g | Shaft mass: 39 g/100mm | Max. shaft length: 500 mm
WSPTF10Shaft diameter d: 10 mm | Nut outer diameter D: 21 mm | Nut length L1: 33 mm | Flange diameter D1: 42 mm | Bolt PCD: 32 mm | C (dynamic): 2842 N | C0 (static): 4900 N | T (dynamic torque): 3.92 N·m | T0 (static torque): 7.84 N·m | Nut mass: 64.2 g | Shaft mass: 60.5 g/100mm | Max. shaft length: 600 mm
WSPTF12Shaft diameter d: 12 mm | Nut outer diameter D: 24 mm | Nut length L1: 36 mm | Flange diameter D1: 44 mm | Bolt PCD: 33 mm | C (dynamic): 3528 N | C0 (static): 5782 N | T (dynamic torque): 5.88 N·m | T0 (static torque): 10.78 N·m | Nut mass: 124.7 g | Shaft mass: 87.5 g/100mm | Max. shaft length: 800 mm
WSPTF15Shaft diameter d: 13.6 mm | Nut outer diameter D: 31 mm | Nut length L1: 50 mm | Flange diameter D1: 51 mm | Bolt PCD: 40 mm | C (dynamic): 7056 N | C0 (static): 12642 N | T (dynamic torque): 31.36 N·m | T0 (static torque): 34.30 N·m | Nut mass: 265.7 g | Shaft mass: 111 g/100mm | Max. shaft length: 1000 mm
WSPTF20Shaft diameter d: 18.2 mm | Nut outer diameter D: 35 mm | Nut length L1: 63 mm | Flange diameter D1: 58 mm | Bolt PCD: 45 mm | C (dynamic): 10192 N | C0 (static): 17836 N | T (dynamic torque): 56.84 N·m | T0 (static torque): 55.86 N·m | Nut mass: 392.5 g | Shaft mass: 202 g/100mm | Max. shaft length: 1000 mm

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