• THK Ball Spline Nut DP (Key Groove Type)
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THK Ball Spline Nut DP (Key Groove Type)

THK Ball Spline Nut DP (Key Groove Type)

THK DP type Ball Spline Nut, key groove mounting design.

Key features

  • Outer diameter D = 22~68mm, nut length 22~67mm
  • Key groove dimensions b×t provided for positive torque transmission
  • Dynamic allowable torque contact pressure 9.8 N/mm². Rotational clearance ≤20' MAX
  • Compatible with SS series spline shafts (SS12~SS50)
  • Do not install multiple spline nuts in one housing

Specifications

Mounting Type Key groove
Rotational Clearance ≤20' MAX
Note Do not install multiple nuts in one housing
DP12 THK Ball Spline Nut DP12 (key groove), D=22mm, L=22mm, T=19.6N·m | Outer Diameter (D): 22 mm (0/-0.052) | Nut Length (L): 22 mm | Key Width (b): 4 mm | Key Depth (t): 2.0 mm | Key Length (ℓ): 16 mm | Mounting Type: Key groove | Compatible Shaft: SS12 | Dynamic Allowable Torque (T): 19.6 N·m | Rotational Clearance: ≤20' MAX | Note: Do not install multiple nuts in one housing
DP15 THK Ball Spline Nut DP15 (key groove), D=22mm, L=22mm, T=33.3N·m | Outer Diameter (D): 22 mm (0/-0.052) | Nut Length (L): 22 mm | Key Width (b): 4 mm | Key Depth (t): 2.0 mm | Key Length (ℓ): 16 mm | Mounting Type: Key groove | Compatible Shaft: SS15 | Dynamic Allowable Torque (T): 33.3 N·m | Rotational Clearance: ≤20' MAX | Note: Do not install multiple nuts in one housing
DP17 THK Ball Spline Nut DP17 (key groove), D=28mm, L=26mm, T=48.0N·m | Outer Diameter (D): 28 mm (0/-0.052) | Nut Length (L): 26 mm | Key Width (b): 5 mm | Key Depth (t): 2.5 mm | Key Length (ℓ): 18 mm | Mounting Type: Key groove | Compatible Shaft: SS17 | Dynamic Allowable Torque (T): 48.0 N·m | Rotational Clearance: ≤20' MAX | Note: Do not install multiple nuts in one housing
DP20 THK Ball Spline Nut DP20 (key groove), D=32mm, L=31mm, T=77.5N·m | Outer Diameter (D): 32 mm (0/-0.062) | Nut Length (L): 31 mm | Key Width (b): 7 mm | Key Depth (t): 2.5 mm | Key Length (ℓ): 22 mm | Mounting Type: Key groove | Compatible Shaft: SS20 | Dynamic Allowable Torque (T): 77.5 N·m | Rotational Clearance: ≤20' MAX | Note: Do not install multiple nuts in one housing
DP25 THK Ball Spline Nut DP25 (key groove), D=36mm, L=40mm, T=169.0N·m | Outer Diameter (D): 36 mm (0/-0.062) | Nut Length (L): 40 mm | Key Width (b): 7 mm | Key Depth (t): 2.5 mm | Key Length (ℓ): 26 mm | Mounting Type: Key groove | Compatible Shaft: SS25 | Dynamic Allowable Torque (T): 169.0 N·m | Rotational Clearance: ≤20' MAX | Note: Do not install multiple nuts in one housing
DP30 THK Ball Spline Nut DP30 (key groove), D=44mm, L=45mm, T=238.0N·m | Outer Diameter (D): 44 mm (0/-0.062) | Nut Length (L): 45 mm | Key Width (b): 10 mm | Key Depth (t): 4.0 mm | Key Length (ℓ): 32 mm | Mounting Type: Key groove | Compatible Shaft: SS30 | Dynamic Allowable Torque (T): 238.0 N·m | Rotational Clearance: ≤20' MAX | Note: Do not install multiple nuts in one housing
DP35 THK Ball Spline Nut DP35 (key groove), D=52mm, L=49mm, T=362.0N·m | Outer Diameter (D): 52 mm (0/-0.074) | Nut Length (L): 49 mm | Key Width (b): 12 mm | Key Depth (t): 4.5 mm | Key Length (ℓ): 40 mm | Mounting Type: Key groove | Compatible Shaft: SS35 | Dynamic Allowable Torque (T): 362.0 N·m | Rotational Clearance: ≤20' MAX | Note: Do not install multiple nuts in one housing
DP40 THK Ball Spline Nut DP40 (key groove), D=58mm, L=57mm, T=547.0N·m | Outer Diameter (D): 58 mm (0/-0.074) | Nut Length (L): 57 mm | Key Width (b): 15 mm | Key Depth (t): 5.0 mm | Key Length (ℓ): 42 mm | Mounting Type: Key groove | Compatible Shaft: SS40 | Dynamic Allowable Torque (T): 547.0 N·m | Rotational Clearance: ≤20' MAX | Note: Do not install multiple nuts in one housing
DP45 THK Ball Spline Nut DP45 (key groove), D=64mm, L=62mm, T=767.0N·m | Outer Diameter (D): 64 mm (0/-0.074) | Nut Length (L): 62 mm | Key Width (b): 15 mm | Key Depth (t): 5.0 mm | Key Length (ℓ): 48 mm | Mounting Type: Key groove | Compatible Shaft: SS45 | Dynamic Allowable Torque (T): 767.0 N·m | Rotational Clearance: ≤20' MAX | Note: Do not install multiple nuts in one housing
DP50 THK Ball Spline Nut DP50 (key groove), D=68mm, L=67mm, T=1020.0N·m | Outer Diameter (D): 68 mm (0/-0.074) | Nut Length (L): 67 mm | Key Width (b): 15 mm | Key Depth (t): 5.0 mm | Key Length (ℓ): 52 mm | Mounting Type: Key groove | Compatible Shaft: SS50 | Dynamic Allowable Torque (T): 1020.0 N·m | Rotational Clearance: ≤20' MAX | Note: Do not install multiple nuts in one housing
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THK Ball Spline Nut DP (Key Groove Type)

Brand THK·Ball Splines

Available part numbers (10)

DP12, DP15, DP17, DP20, DP25, DP30, DP35, DP40, DP45, DP50

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
DP12THK Ball Spline Nut DP12 (key groove), D=22mm, L=22mm, T=19.6N·m | Outer Diameter (D): 22 mm (0/-0.052) | Nut Length (L): 22 mm | Key Width (b): 4 mm | Key Depth (t): 2.0 mm | Key Length (ℓ): 16 mm | Mounting Type: Key groove | Compatible Shaft: SS12 | Dynamic Allowable Torque (T): 19.6 N·m | Rotational Clearance: ≤20' MAX | Note: Do not install multiple nuts in one housing
DP15THK Ball Spline Nut DP15 (key groove), D=22mm, L=22mm, T=33.3N·m | Outer Diameter (D): 22 mm (0/-0.052) | Nut Length (L): 22 mm | Key Width (b): 4 mm | Key Depth (t): 2.0 mm | Key Length (ℓ): 16 mm | Mounting Type: Key groove | Compatible Shaft: SS15 | Dynamic Allowable Torque (T): 33.3 N·m | Rotational Clearance: ≤20' MAX | Note: Do not install multiple nuts in one housing
DP17THK Ball Spline Nut DP17 (key groove), D=28mm, L=26mm, T=48.0N·m | Outer Diameter (D): 28 mm (0/-0.052) | Nut Length (L): 26 mm | Key Width (b): 5 mm | Key Depth (t): 2.5 mm | Key Length (ℓ): 18 mm | Mounting Type: Key groove | Compatible Shaft: SS17 | Dynamic Allowable Torque (T): 48.0 N·m | Rotational Clearance: ≤20' MAX | Note: Do not install multiple nuts in one housing
DP20THK Ball Spline Nut DP20 (key groove), D=32mm, L=31mm, T=77.5N·m | Outer Diameter (D): 32 mm (0/-0.062) | Nut Length (L): 31 mm | Key Width (b): 7 mm | Key Depth (t): 2.5 mm | Key Length (ℓ): 22 mm | Mounting Type: Key groove | Compatible Shaft: SS20 | Dynamic Allowable Torque (T): 77.5 N·m | Rotational Clearance: ≤20' MAX | Note: Do not install multiple nuts in one housing
DP25THK Ball Spline Nut DP25 (key groove), D=36mm, L=40mm, T=169.0N·m | Outer Diameter (D): 36 mm (0/-0.062) | Nut Length (L): 40 mm | Key Width (b): 7 mm | Key Depth (t): 2.5 mm | Key Length (ℓ): 26 mm | Mounting Type: Key groove | Compatible Shaft: SS25 | Dynamic Allowable Torque (T): 169.0 N·m | Rotational Clearance: ≤20' MAX | Note: Do not install multiple nuts in one housing
DP30THK Ball Spline Nut DP30 (key groove), D=44mm, L=45mm, T=238.0N·m | Outer Diameter (D): 44 mm (0/-0.062) | Nut Length (L): 45 mm | Key Width (b): 10 mm | Key Depth (t): 4.0 mm | Key Length (ℓ): 32 mm | Mounting Type: Key groove | Compatible Shaft: SS30 | Dynamic Allowable Torque (T): 238.0 N·m | Rotational Clearance: ≤20' MAX | Note: Do not install multiple nuts in one housing
DP35THK Ball Spline Nut DP35 (key groove), D=52mm, L=49mm, T=362.0N·m | Outer Diameter (D): 52 mm (0/-0.074) | Nut Length (L): 49 mm | Key Width (b): 12 mm | Key Depth (t): 4.5 mm | Key Length (ℓ): 40 mm | Mounting Type: Key groove | Compatible Shaft: SS35 | Dynamic Allowable Torque (T): 362.0 N·m | Rotational Clearance: ≤20' MAX | Note: Do not install multiple nuts in one housing
DP40THK Ball Spline Nut DP40 (key groove), D=58mm, L=57mm, T=547.0N·m | Outer Diameter (D): 58 mm (0/-0.074) | Nut Length (L): 57 mm | Key Width (b): 15 mm | Key Depth (t): 5.0 mm | Key Length (ℓ): 42 mm | Mounting Type: Key groove | Compatible Shaft: SS40 | Dynamic Allowable Torque (T): 547.0 N·m | Rotational Clearance: ≤20' MAX | Note: Do not install multiple nuts in one housing
DP45THK Ball Spline Nut DP45 (key groove), D=64mm, L=62mm, T=767.0N·m | Outer Diameter (D): 64 mm (0/-0.074) | Nut Length (L): 62 mm | Key Width (b): 15 mm | Key Depth (t): 5.0 mm | Key Length (ℓ): 48 mm | Mounting Type: Key groove | Compatible Shaft: SS45 | Dynamic Allowable Torque (T): 767.0 N·m | Rotational Clearance: ≤20' MAX | Note: Do not install multiple nuts in one housing
DP50THK Ball Spline Nut DP50 (key groove), D=68mm, L=67mm, T=1020.0N·m | Outer Diameter (D): 68 mm (0/-0.074) | Nut Length (L): 67 mm | Key Width (b): 15 mm | Key Depth (t): 5.0 mm | Key Length (ℓ): 52 mm | Mounting Type: Key groove | Compatible Shaft: SS50 | Dynamic Allowable Torque (T): 1020.0 N·m | Rotational Clearance: ≤20' MAX | Note: Do not install multiple nuts in one housing

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