• THK LBF Ball Spline Nut (Medium-Heavy Load, Flange Type)
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THK LBF Ball Spline Nut (Medium-Heavy Load, Flange Type)

THK LBF Ball Spline Nut (Medium-Heavy Load, Flange Type)

THK LBF-type Ball Spline Nut, medium-heavy load flange type for bolt mounting to housing.

Key features

  • Ideal where keyway machining could cause housing distortion or where housing width is limited
  • High-temperature option and felt seal available for LBF20–LBF100
  • Sizes: LBF15–LBF100

Specifications

Type LBF Ball Spline Nut, Medium-Heavy Load Flange
LBF15 THK LBF15, D=23mm L=40mm flange D1=43mm, CT=30.4N·m | Model: LBF15 | Type: LBF Ball Spline Nut, Medium-Heavy Load Flange | OD D: 23 mm | Length L: 40 mm | Flange OD D1: 43 mm | Flange Height H: 7 mm | F: 13.0 mm | Dynamic Torque CT: 30.4 N·m | Static Torque C0T: 74.5 N·m | Dynamic Load C: 4.4 kN | Static Load C0: 8.4 kN | Nut Mass: 0.11 kg | Shaft Mass: 1.0 kg/m | Options: Standard only
LBF20 THK LBF20, D=30mm L=50mm flange D1=49mm, CT=74.5N·m | Model: LBF20 | Type: LBF Ball Spline Nut, Medium-Heavy Load Flange | OD D: 30 mm | Length L: 50 mm | Flange OD D1: 49 mm | Flange Height H: 7 mm | F: 18.0 mm | Dynamic Torque CT: 74.5 N·m | Static Torque C0T: 160.0 N·m | Dynamic Load C: 7.8 kN | Static Load C0: 14.9 kN | Nut Mass: 0.2 kg | Shaft Mass: 1.8 kg/m | Options: High-temp (metal retainer, ≤100°C); Felt seal option available
LBF25 THK LBF25, D=37mm L=60mm flange D1=60mm, CT=154.0N·m | Model: LBF25 | Type: LBF Ball Spline Nut, Medium-Heavy Load Flange | OD D: 37 mm | Length L: 60 mm | Flange OD D1: 60 mm | Flange Height H: 9 mm | F: 21.0 mm | Dynamic Torque CT: 154.0 N·m | Static Torque C0T: 307.0 N·m | Dynamic Load C: 13.0 kN | Static Load C0: 23.5 kN | Nut Mass: 0.36 kg | Shaft Mass: 2.7 kg/m | Options: High-temp (metal retainer, ≤100°C); Felt seal option available
LBF30 THK LBF30, D=45mm L=70mm flange D1=70mm, CT=273.0N·m | Model: LBF30 | Type: LBF Ball Spline Nut, Medium-Heavy Load Flange | OD D: 45 mm | Length L: 70 mm | Flange OD D1: 70 mm | Flange Height H: 10 mm | F: 25.0 mm | Dynamic Torque CT: 273.0 N·m | Static Torque C0T: 538.0 N·m | Dynamic Load C: 19.3 kN | Static Load C0: 33.8 kN | Nut Mass: 0.6 kg | Shaft Mass: 3.8 kg/m | Options: High-temp (metal retainer, ≤100°C); Felt seal option available
LBF40 THK LBF40, D=57mm L=90mm flange D1=90mm, CT=599.0N·m | Model: LBF40 | Type: LBF Ball Spline Nut, Medium-Heavy Load Flange | OD D: 57 mm | Length L: 90 mm | Flange OD D1: 90 mm | Flange Height H: 14 mm | F: 31.0 mm | Dynamic Torque CT: 599.0 N·m | Static Torque C0T: 1140.0 N·m | Dynamic Load C: 31.9 kN | Static Load C0: 53.4 kN | Nut Mass: 1.2 kg | Shaft Mass: 6.8 kg/m | Options: High-temp (metal retainer, ≤100°C); Felt seal option available
LBF50 THK LBF50, D=70mm L=100mm flange D1=108mm, CT=1100.0N·m | Model: LBF50 | Type: LBF Ball Spline Nut, Medium-Heavy Load Flange | OD D: 70 mm | Length L: 100 mm | Flange OD D1: 108 mm | Flange Height H: 16 mm | F: 34.0 mm | Dynamic Torque CT: 1100.0 N·m | Static Torque C0T: 1940.0 N·m | Dynamic Load C: 46.6 kN | Static Load C0: 73.0 kN | Nut Mass: 1.9 kg | Shaft Mass: 10.6 kg/m | Options: High-temp (metal retainer, ≤100°C); Felt seal option available
LBF60 THK LBF60, D=85mm L=127mm flange D1=124mm, CT=1870.0N·m | Model: LBF60 | Type: LBF Ball Spline Nut, Medium-Heavy Load Flange | OD D: 85 mm | Length L: 127 mm | Flange OD D1: 124 mm | Flange Height H: 18 mm | F: 45.5 mm | Dynamic Torque CT: 1870.0 N·m | Static Torque C0T: 3830.0 N·m | Dynamic Load C: 66.2 kN | Static Load C0: 121.0 kN | Nut Mass: 3.5 kg | Shaft Mass: 15.6 kg/m | Options: High-temp (metal retainer, ≤100°C)
LBF70 THK LBF70, D=95mm L=110mm flange D1=142mm, CT=2190.0N·m | Model: LBF70 | Type: LBF Ball Spline Nut, Medium-Heavy Load Flange | OD D: 95 mm | Length L: 110 mm | Flange OD D1: 142 mm | Flange Height H: 20 mm | F: 35.0 mm | Dynamic Torque CT: 2190.0 N·m | Static Torque C0T: 3800.0 N·m | Dynamic Load C: 66.4 kN | Static Load C0: 102.0 kN | Nut Mass: 3.6 kg | Shaft Mass: 21.3 kg/m | Options: High-temp (metal retainer, ≤100°C); Felt seal option available
LBF85 THK LBF85, D=115mm L=140mm flange D1=168mm, CT=3620.0N·m | Model: LBF85 | Type: LBF Ball Spline Nut, Medium-Heavy Load Flange | OD D: 115 mm | Length L: 140 mm | Flange OD D1: 168 mm | Flange Height H: 22 mm | F: 48.0 mm | Dynamic Torque CT: 3620.0 N·m | Static Torque C0T: 6360.0 N·m | Dynamic Load C: 90.5 kN | Static Load C0: 141.0 kN | Nut Mass: 6.2 kg | Shaft Mass: 32.0 kg/m | Options: High-temp (metal retainer, ≤100°C); Felt seal option available
LBF100 THK LBF100, D=135mm L=160mm flange D1=195mm, CT=5910.0N·m | Model: LBF100 | Type: LBF Ball Spline Nut, Medium-Heavy Load Flange | OD D: 135 mm | Length L: 160 mm | Flange OD D1: 195 mm | Flange Height H: 25 mm | F: 55.0 mm | Dynamic Torque CT: 5910.0 N·m | Static Torque C0T: 12600.0 N·m | Dynamic Load C: 126.0 kN | Static Load C0: 237.0 kN | Nut Mass: 11.0 kg | Shaft Mass: 45.0 kg/m | Options: High-temp (metal retainer, ≤100°C); Felt seal option available
Ball SplinesTHK
10 product codes available in this family
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THK LBF Ball Spline Nut (Medium-Heavy Load, Flange Type)

Brand THK·Ball Splines

Available part numbers (10)

LBF15, LBF20, LBF25, LBF30, LBF40, LBF50, LBF60, LBF70, LBF85, LBF100

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
LBF15THK LBF15, D=23mm L=40mm flange D1=43mm, CT=30.4N·m | Model: LBF15 | Type: LBF Ball Spline Nut, Medium-Heavy Load Flange | OD D: 23 mm | Length L: 40 mm | Flange OD D1: 43 mm | Flange Height H: 7 mm | F: 13.0 mm | Dynamic Torque CT: 30.4 N·m | Static Torque C0T: 74.5 N·m | Dynamic Load C: 4.4 kN | Static Load C0: 8.4 kN | Nut Mass: 0.11 kg | Shaft Mass: 1.0 kg/m | Options: Standard only
LBF20THK LBF20, D=30mm L=50mm flange D1=49mm, CT=74.5N·m | Model: LBF20 | Type: LBF Ball Spline Nut, Medium-Heavy Load Flange | OD D: 30 mm | Length L: 50 mm | Flange OD D1: 49 mm | Flange Height H: 7 mm | F: 18.0 mm | Dynamic Torque CT: 74.5 N·m | Static Torque C0T: 160.0 N·m | Dynamic Load C: 7.8 kN | Static Load C0: 14.9 kN | Nut Mass: 0.2 kg | Shaft Mass: 1.8 kg/m | Options: High-temp (metal retainer, ≤100°C); Felt seal option available
LBF25THK LBF25, D=37mm L=60mm flange D1=60mm, CT=154.0N·m | Model: LBF25 | Type: LBF Ball Spline Nut, Medium-Heavy Load Flange | OD D: 37 mm | Length L: 60 mm | Flange OD D1: 60 mm | Flange Height H: 9 mm | F: 21.0 mm | Dynamic Torque CT: 154.0 N·m | Static Torque C0T: 307.0 N·m | Dynamic Load C: 13.0 kN | Static Load C0: 23.5 kN | Nut Mass: 0.36 kg | Shaft Mass: 2.7 kg/m | Options: High-temp (metal retainer, ≤100°C); Felt seal option available
LBF30THK LBF30, D=45mm L=70mm flange D1=70mm, CT=273.0N·m | Model: LBF30 | Type: LBF Ball Spline Nut, Medium-Heavy Load Flange | OD D: 45 mm | Length L: 70 mm | Flange OD D1: 70 mm | Flange Height H: 10 mm | F: 25.0 mm | Dynamic Torque CT: 273.0 N·m | Static Torque C0T: 538.0 N·m | Dynamic Load C: 19.3 kN | Static Load C0: 33.8 kN | Nut Mass: 0.6 kg | Shaft Mass: 3.8 kg/m | Options: High-temp (metal retainer, ≤100°C); Felt seal option available
LBF40THK LBF40, D=57mm L=90mm flange D1=90mm, CT=599.0N·m | Model: LBF40 | Type: LBF Ball Spline Nut, Medium-Heavy Load Flange | OD D: 57 mm | Length L: 90 mm | Flange OD D1: 90 mm | Flange Height H: 14 mm | F: 31.0 mm | Dynamic Torque CT: 599.0 N·m | Static Torque C0T: 1140.0 N·m | Dynamic Load C: 31.9 kN | Static Load C0: 53.4 kN | Nut Mass: 1.2 kg | Shaft Mass: 6.8 kg/m | Options: High-temp (metal retainer, ≤100°C); Felt seal option available
LBF50THK LBF50, D=70mm L=100mm flange D1=108mm, CT=1100.0N·m | Model: LBF50 | Type: LBF Ball Spline Nut, Medium-Heavy Load Flange | OD D: 70 mm | Length L: 100 mm | Flange OD D1: 108 mm | Flange Height H: 16 mm | F: 34.0 mm | Dynamic Torque CT: 1100.0 N·m | Static Torque C0T: 1940.0 N·m | Dynamic Load C: 46.6 kN | Static Load C0: 73.0 kN | Nut Mass: 1.9 kg | Shaft Mass: 10.6 kg/m | Options: High-temp (metal retainer, ≤100°C); Felt seal option available
LBF60THK LBF60, D=85mm L=127mm flange D1=124mm, CT=1870.0N·m | Model: LBF60 | Type: LBF Ball Spline Nut, Medium-Heavy Load Flange | OD D: 85 mm | Length L: 127 mm | Flange OD D1: 124 mm | Flange Height H: 18 mm | F: 45.5 mm | Dynamic Torque CT: 1870.0 N·m | Static Torque C0T: 3830.0 N·m | Dynamic Load C: 66.2 kN | Static Load C0: 121.0 kN | Nut Mass: 3.5 kg | Shaft Mass: 15.6 kg/m | Options: High-temp (metal retainer, ≤100°C)
LBF70THK LBF70, D=95mm L=110mm flange D1=142mm, CT=2190.0N·m | Model: LBF70 | Type: LBF Ball Spline Nut, Medium-Heavy Load Flange | OD D: 95 mm | Length L: 110 mm | Flange OD D1: 142 mm | Flange Height H: 20 mm | F: 35.0 mm | Dynamic Torque CT: 2190.0 N·m | Static Torque C0T: 3800.0 N·m | Dynamic Load C: 66.4 kN | Static Load C0: 102.0 kN | Nut Mass: 3.6 kg | Shaft Mass: 21.3 kg/m | Options: High-temp (metal retainer, ≤100°C); Felt seal option available
LBF85THK LBF85, D=115mm L=140mm flange D1=168mm, CT=3620.0N·m | Model: LBF85 | Type: LBF Ball Spline Nut, Medium-Heavy Load Flange | OD D: 115 mm | Length L: 140 mm | Flange OD D1: 168 mm | Flange Height H: 22 mm | F: 48.0 mm | Dynamic Torque CT: 3620.0 N·m | Static Torque C0T: 6360.0 N·m | Dynamic Load C: 90.5 kN | Static Load C0: 141.0 kN | Nut Mass: 6.2 kg | Shaft Mass: 32.0 kg/m | Options: High-temp (metal retainer, ≤100°C); Felt seal option available
LBF100THK LBF100, D=135mm L=160mm flange D1=195mm, CT=5910.0N·m | Model: LBF100 | Type: LBF Ball Spline Nut, Medium-Heavy Load Flange | OD D: 135 mm | Length L: 160 mm | Flange OD D1: 195 mm | Flange Height H: 25 mm | F: 55.0 mm | Dynamic Torque CT: 5910.0 N·m | Static Torque C0T: 12600.0 N·m | Dynamic Load C: 126.0 kN | Static Load C0: 237.0 kN | Nut Mass: 11.0 kg | Shaft Mass: 45.0 kg/m | Options: High-temp (metal retainer, ≤100°C); Felt seal option available

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