![[THK] — LF Ball Spline Nut (Medium-Torque, Flange Type)](https://prosourcemro.com/wp-content/uploads/2026/05/001-965-1024x780.png)
Ball Splines
THK
[THK] — LF Ball Spline Nut (Medium-Torque, Flange Type)
Family ID: THK-LF-BALL-SPLINE
THK LF-type Ball Spline Nut, medium-torque flange type for bolt mounting to housing. No keyway machining required — ideal where keyway could cause housing distortion or where housing width is limited. High-temperature option available for LF16–LF50. Sizes: LF6–LF50.
10 product codes available in this family
Product Codes & Specifications
| Product Code | Description | Brand | Spec | ||
|---|---|---|---|---|---|
| LF6 | THK LF6, D=14mm L=25mm flange D1=30mm, CT=0.98N·m | THK | Model: LF6 | Type: LF Ball Spline Nut, Medium-Torque Flange | Shaft D0: 6 mm (h7) | Nut OD D: 14 mm | Length L: 25 mm | Flange OD D1: 30 mm | Flange Height H: 5 mm | F: 7.5 mm | Ball Rows: 4 | Dynamic Torque CT: 0.98 N·m | Static Torque C0T: 1.96 N·m | Dynamic Load C: 1.18 kN | Static Load C0: 2.16 kN | Static Moment MA1: 4.9 N·m | Static Moment MA2: 36.3 N·m | Nut Mass: 35 g | Shaft Mass: 0.23 kg/m | Options: Standard | ||
| LF8 | THK LF8, D=16mm L=25mm flange D1=32mm, CT=1.96N·m | THK | Model: LF8 | Type: LF Ball Spline Nut, Medium-Torque Flange | Shaft D0: 8 mm (h7) | Nut OD D: 16 mm | Length L: 25 mm | Flange OD D1: 32 mm | Flange Height H: 5 mm | F: 7.5 mm | Ball Rows: 4 | Dynamic Torque CT: 1.96 N·m | Static Torque C0T: 2.94 N·m | Dynamic Load C: 1.47 kN | Static Load C0: 2.55 kN | Static Moment MA1: 5.9 N·m | Static Moment MA2: 44.1 N·m | Nut Mass: 37 g | Shaft Mass: 0.4 kg/m | Options: Standard | ||
| LF10 | THK LF10, D=21mm L=33mm flange D1=42mm, CT=3.92N·m | THK | Model: LF10 | Type: LF Ball Spline Nut, Medium-Torque Flange | Shaft D0: 10 mm (h7) | Nut OD D: 21 mm | Length L: 33 mm | Flange OD D1: 42 mm | Flange Height H: 6 mm | F: 10.5 mm | Ball Rows: 4 | Dynamic Torque CT: 3.92 N·m | Static Torque C0T: 7.84 N·m | Dynamic Load C: 2.84 kN | Static Load C0: 4.9 kN | Static Moment MA1: 15.7 N·m | Static Moment MA2: 98.0 N·m | Nut Mass: 90 g | Shaft Mass: 0.62 kg/m | Options: Standard | ||
| LF13 | THK LF13, D=24mm L=36mm flange D1=44mm, CT=5.88N·m | THK | Model: LF13 | Type: LF Ball Spline Nut, Medium-Torque Flange | Shaft D0: 13 mm (h7) | Nut OD D: 24 mm | Length L: 36 mm | Flange OD D1: 44 mm | Flange Height H: 7 mm | F: 11.0 mm | Ball Rows: 4 | Dynamic Torque CT: 5.88 N·m | Static Torque C0T: 10.8 N·m | Dynamic Load C: 3.53 kN | Static Load C0: 5.78 kN | Static Moment MA1: 19.6 N·m | Static Moment MA2: 138.0 N·m | Nut Mass: 110 g | Shaft Mass: 1.1 kg/m | Options: Standard | ||
| LF16 | THK LF16, D=31mm L=50mm flange D1=51mm, CT=31.4N·m | THK | Model: LF16 | Type: LF Ball Spline Nut, Medium-Torque Flange | Shaft D0: 16 mm (h7) | Nut OD D: 31 mm | Length L: 50 mm | Flange OD D1: 51 mm | Flange Height H: 7 mm | F: 18.0 mm | Ball Rows: 6 | Dynamic Torque CT: 31.4 N·m | Static Torque C0T: 34.3 N·m | Dynamic Load C: 7.06 kN | Static Load C0: 12.6 kN | Static Moment MA1: 67.6 N·m | Static Moment MA2: 393.0 N·m | Nut Mass: 230 g | Shaft Mass: 1.6 kg/m | Options: High-temp (metal retainer, ≤100°C) | ||
| LF20 | THK LF20, D=35mm L=63mm flange D1=58mm, CT=56.9N·m | THK | Model: LF20 | Type: LF Ball Spline Nut, Medium-Torque Flange | Shaft D0: 20 mm (h7) | Nut OD D: 35 mm | Length L: 63 mm | Flange OD D1: 58 mm | Flange Height H: 9 mm | F: 22.5 mm | Ball Rows: 6 | Dynamic Torque CT: 56.9 N·m | Static Torque C0T: 55.9 N·m | Dynamic Load C: 10.2 kN | Static Load C0: 17.8 kN | Static Moment MA1: 118.0 N·m | Static Moment MA2: 700.0 N·m | Nut Mass: 330 g | Shaft Mass: 2.5 kg/m | Options: High-temp (metal retainer, ≤100°C) | ||
| LF25 | THK LF25, D=42mm L=71mm flange D1=65mm, CT=105.0N·m | THK | Model: LF25 | Type: LF Ball Spline Nut, Medium-Torque Flange | Shaft D0: 25 mm (h7) | Nut OD D: 42 mm | Length L: 71 mm | Flange OD D1: 65 mm | Flange Height H: 9 mm | F: 26.5 mm | Ball Rows: 6 | Dynamic Torque CT: 105.0 N·m | Static Torque C0T: 103.0 N·m | Dynamic Load C: 15.2 kN | Static Load C0: 25.8 kN | Static Moment MA1: 210.0 N·m | Static Moment MA2: 1140.0 N·m | Nut Mass: 455 g | Shaft Mass: 3.9 kg/m | Options: High-temp (metal retainer, ≤100°C) | ||
| LF30 | THK LF30, D=47mm L=80mm flange D1=75mm, CT=171.0N·m | THK | Model: LF30 | Type: LF Ball Spline Nut, Medium-Torque Flange | Shaft D0: 30 mm (h7) | Nut OD D: 47 mm | Length L: 80 mm | Flange OD D1: 75 mm | Flange Height H: 10 mm | F: 30.0 mm | Ball Rows: 6 | Dynamic Torque CT: 171.0 N·m | Static Torque C0T: 148.0 N·m | Dynamic Load C: 20.5 kN | Static Load C0: 34.0 kN | Static Moment MA1: 290.0 N·m | Static Moment MA2: 1710.0 N·m | Nut Mass: 565 g | Shaft Mass: 5.6 kg/m | Options: High-temp (metal retainer, ≤100°C) | ||
| LF40 | THK LF40, D=64mm L=100mm flange D1=100mm, CT=419.0N·m | THK | Model: LF40 | Type: LF Ball Spline Nut, Medium-Torque Flange | Shaft D0: 40 mm (h7) | Nut OD D: 64 mm | Length L: 100 mm | Flange OD D1: 100 mm | Flange Height H: 14 mm | F: 36.0 mm | Ball Rows: 6 | Dynamic Torque CT: 419.0 N·m | Static Torque C0T: 377.0 N·m | Dynamic Load C: 37.8 kN | Static Load C0: 60.5 kN | Static Moment MA1: 687.0 N·m | Static Moment MA2: 3760.0 N·m | Nut Mass: 1460 g | Shaft Mass: 9.9 kg/m | Options: High-temp (metal retainer, ≤100°C) | ||
| LF50 | THK LF50, D=80mm L=125mm flange D1=124mm, CT=842.0N·m | THK | Model: LF50 | Type: LF Ball Spline Nut, Medium-Torque Flange | Shaft D0: 50 mm (h7) | Nut OD D: 80 mm | Length L: 125 mm | Flange OD D1: 124 mm | Flange Height H: 16 mm | F: 46.5 mm | Ball Rows: 6 | Dynamic Torque CT: 842.0 N·m | Static Torque C0T: 769.0 N·m | Dynamic Load C: 60.9 kN | Static Load C0: 94.5 kN | Static Moment MA1: 1340.0 N·m | Static Moment MA2: 7350.0 N·m | Nut Mass: 2760 g | Shaft Mass: 15.5 kg/m | Options: High-temp (metal retainer, ≤100°C) |
