• WON ST Compact Ball Spline WSPT Series, Cylinder Type with Internal Retainer
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WON ST Compact Ball Spline WSPT Series, Cylinder Type with Internal Retainer

WON ST Compact Ball Spline WSPT Series, Cylinder 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; cylindrical nut with internal retainer and key groove.

Key features

  • Retainer placed inside the nut for clean appearance and rigidity
  • 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 Cylinder nut with internal retainer and key groove
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)
WSPT4 Shaft diameter d: 4 mm | Nut outer diameter D: 10 mm | Nut length L1: 16 mm | Key groove width W: 2 mm | C (dynamic): 441 N | C0 (static): 637 N | T (dynamic torque): 0.588 N·m | T0 (static torque): 0.784 N·m | Nut mass: 2.5 g | Shaft mass: 9.6 g/100mm | Max. shaft length: 200 mm
WSPT5 Shaft diameter d: 5 mm | Nut outer diameter D: 12 mm | Nut length L1: 20 mm | Key groove width W: 2.5 mm | C (dynamic): 686 N | C0 (static): 882 N | T (dynamic torque): 0.882 N·m | T0 (static torque): 1.372 N·m | Nut mass: 4.8 g | Shaft mass: 14.9 g/100mm | Max. shaft length: 200 mm
WSPT6 Shaft diameter d: 6 mm | Nut outer diameter D: 14 mm | Nut length L1: 25 mm | Key groove width W: 2.5 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: 8.9 g | Shaft mass: 19 g/100mm | Max. shaft length: 300 mm
WSPT8 Shaft diameter d: 8 mm | Nut outer diameter D: 16 mm | Nut length L1: 25 mm | Key groove width W: 2.5 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: 15.9 g | Shaft mass: 39 g/100mm | Max. shaft length: 500 mm
WSPT10 Shaft diameter d: 10 mm | Nut outer diameter D: 21 mm | Nut length L1: 33 mm | Key groove width W: 3 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: 31.5 g | Shaft mass: 60.5 g/100mm | Max. shaft length: 600 mm
WSPT12 Shaft diameter d: 12 mm | Nut outer diameter D: 24 mm | Nut length L1: 36 mm | Key groove width W: 3 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: 44 g | Shaft mass: 87.5 g/100mm | Max. shaft length: 800 mm
WSPT15 Shaft diameter d: 13.6 mm | Nut outer diameter D: 31 mm | Nut length L1: 50 mm | Key groove width W: 3.5 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: 59.5 g | Shaft mass: 111 g/100mm | Max. shaft length: 1000 mm
WSPT20 Shaft diameter d: 18.2 mm | Nut outer diameter D: 35 mm | Nut length L1: 63 mm | Key groove width W: 4 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: 130 g | Shaft mass: 202 g/100mm | Max. shaft length: 1000 mm
Ball SplinesWON ST
8 product codes available in this family
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WON ST Compact Ball Spline WSPT Series, Cylinder Type with Internal Retainer

Brand WON ST·Ball Splines

Available part numbers (8)

WSPT4, WSPT5, WSPT6, WSPT8, WSPT10, WSPT12, WSPT15, WSPT20

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 codeSpec
WSPT4Shaft diameter d: 4 mm | Nut outer diameter D: 10 mm | Nut length L1: 16 mm | Key groove width W: 2 mm | C (dynamic): 441 N | C0 (static): 637 N | T (dynamic torque): 0.588 N·m | T0 (static torque): 0.784 N·m | Nut mass: 2.5 g | Shaft mass: 9.6 g/100mm | Max. shaft length: 200 mm
WSPT5Shaft diameter d: 5 mm | Nut outer diameter D: 12 mm | Nut length L1: 20 mm | Key groove width W: 2.5 mm | C (dynamic): 686 N | C0 (static): 882 N | T (dynamic torque): 0.882 N·m | T0 (static torque): 1.372 N·m | Nut mass: 4.8 g | Shaft mass: 14.9 g/100mm | Max. shaft length: 200 mm
WSPT6Shaft diameter d: 6 mm | Nut outer diameter D: 14 mm | Nut length L1: 25 mm | Key groove width W: 2.5 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: 8.9 g | Shaft mass: 19 g/100mm | Max. shaft length: 300 mm
WSPT8Shaft diameter d: 8 mm | Nut outer diameter D: 16 mm | Nut length L1: 25 mm | Key groove width W: 2.5 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: 15.9 g | Shaft mass: 39 g/100mm | Max. shaft length: 500 mm
WSPT10Shaft diameter d: 10 mm | Nut outer diameter D: 21 mm | Nut length L1: 33 mm | Key groove width W: 3 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: 31.5 g | Shaft mass: 60.5 g/100mm | Max. shaft length: 600 mm
WSPT12Shaft diameter d: 12 mm | Nut outer diameter D: 24 mm | Nut length L1: 36 mm | Key groove width W: 3 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: 44 g | Shaft mass: 87.5 g/100mm | Max. shaft length: 800 mm
WSPT15Shaft diameter d: 13.6 mm | Nut outer diameter D: 31 mm | Nut length L1: 50 mm | Key groove width W: 3.5 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: 59.5 g | Shaft mass: 111 g/100mm | Max. shaft length: 1000 mm
WSPT20Shaft diameter d: 18.2 mm | Nut outer diameter D: 35 mm | Nut length L1: 63 mm | Key groove width W: 4 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: 130 g | Shaft mass: 202 g/100mm | Max. shaft length: 1000 mm

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