• THK Ball Spline Shaft SS
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THK Ball Spline Shaft SS

THK Ball Spline Shaft SS

THK SS type Ball Spline Shaft.

Key features

  • Pitch diameter D0 = 12~50mm
  • Standard lengths 1500~3200mm; custom lengths available on order
  • Dynamic allowable torque T = 17.6~910 N·m
  • Number of ball grooves Z = 16 (SS12~SS25) or 20 (SS30~SS50)

Specifications

Standard Length 1500 mm
Custom Length available on order
SS12 THK Ball Spline Shaft SS12, D0=12mm, T=17.6N·m, max 1500mm | Pitch Diameter (D0): 12 mm | Major Diameter (Dk): 12.8 mm | Minor Diameter (Dr): 10.9 mm | Number of Ball Grooves (Z): 16 | Standard Length: 1500 mm | Max Length: 1500 mm | Dynamic Allowable Torque (T): 17.6 N·m | Nut Mass: 80 g | Shaft Mass: 0.9 kg/m | Custom Length: available on order
SS15 THK Ball Spline Shaft SS15, D0=15mm, T=30.4N·m, max 2000mm | Pitch Diameter (D0): 15 mm | Major Diameter (Dk): 16.1 mm | Minor Diameter (Dr): 13.5 mm | Number of Ball Grooves (Z): 16 | Standard Length: 1500 mm | Max Length: 2000 mm | Dynamic Allowable Torque (T): 30.4 N·m | Nut Mass: 70 g | Shaft Mass: 1.4 kg/m | Custom Length: available on order
SS17 THK Ball Spline Shaft SS17, D0=17mm, T=43.1N·m, max 2000mm | Pitch Diameter (D0): 17 mm | Major Diameter (Dk): 18.2 mm | Minor Diameter (Dr): 15.4 mm | Number of Ball Grooves (Z): 16 | Standard Length: 1500 mm | Max Length: 2000 mm | Dynamic Allowable Torque (T): 43.1 N·m | Nut Mass: 120 g | Shaft Mass: 1.7 kg/m | Custom Length: available on order
SS20 THK Ball Spline Shaft SS20, D0=20mm, T=70.6N·m, max 3200mm | Pitch Diameter (D0): 20 mm | Major Diameter (Dk): 21.5 mm | Minor Diameter (Dr): 18.3 mm | Number of Ball Grooves (Z): 16 | Standard Length: 1500 mm | Max Length: 3200 mm | Dynamic Allowable Torque (T): 70.6 N·m | Nut Mass: 160 g | Shaft Mass: 2.5 kg/m | Custom Length: available on order
SS25 THK Ball Spline Shaft SS25, D0=25mm, T=152.0N·m, max 3200mm | Pitch Diameter (D0): 25 mm | Major Diameter (Dk): 26.9 mm | Minor Diameter (Dr): 22.6 mm | Number of Ball Grooves (Z): 16 | Standard Length: 1500 mm | Max Length: 3200 mm | Dynamic Allowable Torque (T): 152.0 N·m | Nut Mass: 220 g | Shaft Mass: 3.8 kg/m | Custom Length: available on order
SS30 THK Ball Spline Shaft SS30, D0=30mm, T=212.0N·m, max 3200mm | Pitch Diameter (D0): 30 mm | Major Diameter (Dk): 31.8 mm | Minor Diameter (Dr): 28.2 mm | Number of Ball Grooves (Z): 20 | Standard Length: 1500 mm | Max Length: 3200 mm | Dynamic Allowable Torque (T): 212.0 N·m | Nut Mass: 400 g | Shaft Mass: 5.5 kg/m | Custom Length: available on order
SS35 THK Ball Spline Shaft SS35, D0=35mm, T=325.0N·m, max 3200mm | Pitch Diameter (D0): 35 mm | Major Diameter (Dk): 37.1 mm | Minor Diameter (Dr): 32.8 mm | Number of Ball Grooves (Z): 20 | Standard Length: 1500 mm | Max Length: 3200 mm | Dynamic Allowable Torque (T): 325.0 N·m | Nut Mass: 560 g | Shaft Mass: 7.5 kg/m | Custom Length: available on order
SS40 THK Ball Spline Shaft SS40, D0=40mm, T=480.0N·m, max 3200mm | Pitch Diameter (D0): 40 mm | Major Diameter (Dk): 42.4 mm | Minor Diameter (Dr): 37.5 mm | Number of Ball Grooves (Z): 20 | Standard Length: 1500 mm | Max Length: 3200 mm | Dynamic Allowable Torque (T): 480.0 N·m | Nut Mass: 830 g | Shaft Mass: 9.8 kg/m | Custom Length: available on order
SS45 THK Ball Spline Shaft SS45, D0=45mm, T=680.0N·m, max 3200mm | Pitch Diameter (D0): 45 mm | Major Diameter (Dk): 47.7 mm | Minor Diameter (Dr): 42.1 mm | Number of Ball Grooves (Z): 20 | Standard Length: 1500 mm | Max Length: 3200 mm | Dynamic Allowable Torque (T): 680.0 N·m | Nut Mass: 980 g | Shaft Mass: 12.4 kg/m | Custom Length: available on order
SS50 THK Ball Spline Shaft SS50, D0=50mm, T=910.0N·m, max 3200mm | Pitch Diameter (D0): 50 mm | Major Diameter (Dk): 53.0 mm | Minor Diameter (Dr): 46.8 mm | Number of Ball Grooves (Z): 20 | Standard Length: 1500 mm | Max Length: 3200 mm | Dynamic Allowable Torque (T): 910.0 N·m | Nut Mass: 1080 g | Shaft Mass: 15.4 kg/m | Custom Length: available on order
Ball SplinesTHK
10 product codes available in this family
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THK Ball Spline Shaft SS

Brand THK·Ball Splines

Available part numbers (10)

SS12, SS15, SS17, SS20, SS25, SS30, SS35, SS40, SS45, SS50

How to order

Send the THK 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
SS12THK Ball Spline Shaft SS12, D0=12mm, T=17.6N·m, max 1500mm | Pitch Diameter (D0): 12 mm | Major Diameter (Dk): 12.8 mm | Minor Diameter (Dr): 10.9 mm | Number of Ball Grooves (Z): 16 | Standard Length: 1500 mm | Max Length: 1500 mm | Dynamic Allowable Torque (T): 17.6 N·m | Nut Mass: 80 g | Shaft Mass: 0.9 kg/m | Custom Length: available on order
SS15THK Ball Spline Shaft SS15, D0=15mm, T=30.4N·m, max 2000mm | Pitch Diameter (D0): 15 mm | Major Diameter (Dk): 16.1 mm | Minor Diameter (Dr): 13.5 mm | Number of Ball Grooves (Z): 16 | Standard Length: 1500 mm | Max Length: 2000 mm | Dynamic Allowable Torque (T): 30.4 N·m | Nut Mass: 70 g | Shaft Mass: 1.4 kg/m | Custom Length: available on order
SS17THK Ball Spline Shaft SS17, D0=17mm, T=43.1N·m, max 2000mm | Pitch Diameter (D0): 17 mm | Major Diameter (Dk): 18.2 mm | Minor Diameter (Dr): 15.4 mm | Number of Ball Grooves (Z): 16 | Standard Length: 1500 mm | Max Length: 2000 mm | Dynamic Allowable Torque (T): 43.1 N·m | Nut Mass: 120 g | Shaft Mass: 1.7 kg/m | Custom Length: available on order
SS20THK Ball Spline Shaft SS20, D0=20mm, T=70.6N·m, max 3200mm | Pitch Diameter (D0): 20 mm | Major Diameter (Dk): 21.5 mm | Minor Diameter (Dr): 18.3 mm | Number of Ball Grooves (Z): 16 | Standard Length: 1500 mm | Max Length: 3200 mm | Dynamic Allowable Torque (T): 70.6 N·m | Nut Mass: 160 g | Shaft Mass: 2.5 kg/m | Custom Length: available on order
SS25THK Ball Spline Shaft SS25, D0=25mm, T=152.0N·m, max 3200mm | Pitch Diameter (D0): 25 mm | Major Diameter (Dk): 26.9 mm | Minor Diameter (Dr): 22.6 mm | Number of Ball Grooves (Z): 16 | Standard Length: 1500 mm | Max Length: 3200 mm | Dynamic Allowable Torque (T): 152.0 N·m | Nut Mass: 220 g | Shaft Mass: 3.8 kg/m | Custom Length: available on order
SS30THK Ball Spline Shaft SS30, D0=30mm, T=212.0N·m, max 3200mm | Pitch Diameter (D0): 30 mm | Major Diameter (Dk): 31.8 mm | Minor Diameter (Dr): 28.2 mm | Number of Ball Grooves (Z): 20 | Standard Length: 1500 mm | Max Length: 3200 mm | Dynamic Allowable Torque (T): 212.0 N·m | Nut Mass: 400 g | Shaft Mass: 5.5 kg/m | Custom Length: available on order
SS35THK Ball Spline Shaft SS35, D0=35mm, T=325.0N·m, max 3200mm | Pitch Diameter (D0): 35 mm | Major Diameter (Dk): 37.1 mm | Minor Diameter (Dr): 32.8 mm | Number of Ball Grooves (Z): 20 | Standard Length: 1500 mm | Max Length: 3200 mm | Dynamic Allowable Torque (T): 325.0 N·m | Nut Mass: 560 g | Shaft Mass: 7.5 kg/m | Custom Length: available on order
SS40THK Ball Spline Shaft SS40, D0=40mm, T=480.0N·m, max 3200mm | Pitch Diameter (D0): 40 mm | Major Diameter (Dk): 42.4 mm | Minor Diameter (Dr): 37.5 mm | Number of Ball Grooves (Z): 20 | Standard Length: 1500 mm | Max Length: 3200 mm | Dynamic Allowable Torque (T): 480.0 N·m | Nut Mass: 830 g | Shaft Mass: 9.8 kg/m | Custom Length: available on order
SS45THK Ball Spline Shaft SS45, D0=45mm, T=680.0N·m, max 3200mm | Pitch Diameter (D0): 45 mm | Major Diameter (Dk): 47.7 mm | Minor Diameter (Dr): 42.1 mm | Number of Ball Grooves (Z): 20 | Standard Length: 1500 mm | Max Length: 3200 mm | Dynamic Allowable Torque (T): 680.0 N·m | Nut Mass: 980 g | Shaft Mass: 12.4 kg/m | Custom Length: available on order
SS50THK Ball Spline Shaft SS50, D0=50mm, T=910.0N·m, max 3200mm | Pitch Diameter (D0): 50 mm | Major Diameter (Dk): 53.0 mm | Minor Diameter (Dr): 46.8 mm | Number of Ball Grooves (Z): 20 | Standard Length: 1500 mm | Max Length: 3200 mm | Dynamic Allowable Torque (T): 910.0 N·m | Nut Mass: 1080 g | Shaft Mass: 15.4 kg/m | Custom Length: available on order

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