• WON ST Compact Ball Spline WSPTO Series, Cylinder Type with Internal Retainer (Large Shaft)
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WON ST Compact Ball Spline WSPTO Series, Cylinder Type with Internal Retainer (Large Shaft)

WON ST Compact Ball Spline WSPTO Series, Cylinder Type with Internal Retainer (Large Shaft)

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 on 16/20 mm shafts.

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)
WSPTO16 Shaft diameter d: 16 mm | Nut outer diameter D: 31 mm | Nut length L1: 50 mm | Key groove width W: 3.5 mm | C (dynamic): 7060 N | C0 (static): 12600 N | T (dynamic torque): 31.4 N·m | T0 (static torque): 34.3 N·m | Nut mass: 165 g | Shaft mass: 160 g/100mm | Max. shaft length: 1000 mm
WSPTO20 Shaft diameter d: 20 mm | Nut outer diameter D: 35 mm | Nut length L1: 63 mm | Key groove width W: 4 mm | C (dynamic): 10200 N | C0 (static): 17800 N | T (dynamic torque): 56.9 N·m | T0 (static torque): 55.9 N·m | Nut mass: 225 g | Shaft mass: 250 g/100mm | Max. shaft length: 1000 mm
Ball SplinesWON ST
2 product codes available in this family
Sourced direct from KoreaExport-ready supplyCompetitive pricing
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WON ST Compact Ball Spline WSPTO Series, Cylinder Type with Internal Retainer (Large Shaft)

Brand WON ST·Ball Splines

Available part numbers (2)

WSPTO16, WSPTO20

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
WSPTO16Shaft diameter d: 16 mm | Nut outer diameter D: 31 mm | Nut length L1: 50 mm | Key groove width W: 3.5 mm | C (dynamic): 7060 N | C0 (static): 12600 N | T (dynamic torque): 31.4 N·m | T0 (static torque): 34.3 N·m | Nut mass: 165 g | Shaft mass: 160 g/100mm | Max. shaft length: 1000 mm
WSPTO20Shaft diameter d: 20 mm | Nut outer diameter D: 35 mm | Nut length L1: 63 mm | Key groove width W: 4 mm | C (dynamic): 10200 N | C0 (static): 17800 N | T (dynamic torque): 56.9 N·m | T0 (static torque): 55.9 N·m | Nut mass: 225 g | Shaft mass: 250 g/100mm | Max. shaft length: 1000 mm

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