![[THK] — LBF Ball Spline Nut (Medium-Heavy Load, Flange Type)](https://prosourcemro.com/wp-content/uploads/2026/05/001-961-1024x808.png)
Ball Splines
THK
[THK] — LBF Ball Spline Nut (Medium-Heavy Load, Flange Type)
Family ID: THK-LBF-BALL-SPLINE
THK LBF-type Ball Spline Nut, medium-heavy load flange type for bolt mounting to housing. 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.
10 product codes available in this family
Product Codes & Specifications
| Product Code | Description | Brand | Spec | ||
|---|---|---|---|---|---|
| LBF15 | THK LBF15, D=23mm L=40mm flange D1=43mm, CT=30.4N·m | THK | 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 | THK | 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 | THK | 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 | THK | 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 | THK | 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 | THK | 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 | THK | 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 | THK | 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 | THK | 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 | THK | 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 |
