![[THK] — LBST Ball Spline Nut (Heavy Load, Long Nut, Cylindrical with Keyway)](https://prosourcemro.com/wp-content/uploads/2026/05/001-960-1024x731.png)
Ball Splines
THK
[THK] — LBST Ball Spline Nut (Heavy Load, Long Nut, Cylindrical with Keyway)
Family ID: THK-LBST-BALL-SPLINE
THK LBST-type Ball Spline Nut — same outer diameter as LBS with extended nut length for high torque, overhang load, and moment applications in confined spaces. High-temperature option available for all sizes. Felt seal available for LBST20–LBST100. Sizes: LBST20–LBST150.
11 product codes available in this family
Product Codes & Specifications
| Product Code | Description | Brand | Spec | ||
|---|---|---|---|---|---|
| LBST20 | THK LBST20, D=30mm L=60mm heavy load long nut, CT=90.2N·m | THK | Model: LBST20 | Type: LBST Ball Spline Nut, Heavy Load Long | OD D: 30 mm | Length L: 60 mm | Keyway Width b: 4 mm (H8) | Keyway Depth t: 2.5 mm | Dynamic Torque CT: 90.2 N·m | Static Torque C0T: 213.0 N·m | Dynamic Load C: 9.4 kN | Static Load C0: 20.1 kN | Nut Mass: 0.17 kg | Shaft Mass: 1.8 kg/m | Options: High-temp (metal retainer, ≤100°C); Felt seal option available | ||
| LBST25 | THK LBST25, D=37mm L=70mm heavy load long nut, CT=176.0N·m | THK | Model: LBST25 | Type: LBST Ball Spline Nut, Heavy Load Long | OD D: 37 mm | Length L: 70 mm | Keyway Width b: 5 mm (H8) | Keyway Depth t: 3.0 mm | Dynamic Torque CT: 176.0 N·m | Static Torque C0T: 381.0 N·m | Dynamic Load C: 14.9 kN | Static Load C0: 28.7 kN | Nut Mass: 0.29 kg | Shaft Mass: 2.7 kg/m | Options: High-temp (metal retainer, ≤100°C); Felt seal option available | ||
| LBST30 | THK LBST30, D=45mm L=80mm heavy load long nut, CT=312.0N·m | THK | Model: LBST30 | Type: LBST Ball Spline Nut, Heavy Load Long | OD D: 45 mm | Length L: 80 mm | Keyway Width b: 7 mm (H8) | Keyway Depth t: 4.0 mm | Dynamic Torque CT: 312.0 N·m | Static Torque C0T: 657.0 N·m | Dynamic Load C: 22.5 kN | Static Load C0: 41.4 kN | Nut Mass: 0.5 kg | Shaft Mass: 3.8 kg/m | Options: High-temp (metal retainer, ≤100°C); Felt seal option available | ||
| LBST40 | THK LBST40, D=60mm L=100mm heavy load long nut, CT=696.0N·m | THK | Model: LBST40 | Type: LBST Ball Spline Nut, Heavy Load Long | OD D: 60 mm | Length L: 100 mm | Keyway Width b: 10 mm (H8) | Keyway Depth t: 4.5 mm | Dynamic Torque CT: 696.0 N·m | Static Torque C0T: 1420.0 N·m | Dynamic Load C: 37.1 kN | Static Load C0: 66.9 kN | Nut Mass: 1.1 kg | Shaft Mass: 6.8 kg/m | Options: High-temp (metal retainer, ≤100°C); Felt seal option available | ||
| LBST50 | THK LBST50, D=75mm L=112mm heavy load long nut, CT=1290.0N·m | THK | Model: LBST50 | Type: LBST Ball Spline Nut, Heavy Load Long | OD D: 75 mm | Length L: 112 mm | Keyway Width b: 15 mm (H8) | Keyway Depth t: 5.0 mm | Dynamic Torque CT: 1290.0 N·m | Static Torque C0T: 2500.0 N·m | Dynamic Load C: 55.1 kN | Static Load C0: 94.1 kN | Nut Mass: 1.9 kg | Shaft Mass: 10.6 kg/m | Options: High-temp (metal retainer, ≤100°C); Felt seal option available | ||
| LBST60 | THK LBST60, D=90mm L=127mm heavy load long nut, CT=1870.0N·m | THK | Model: LBST60 | Type: LBST Ball Spline Nut, Heavy Load Long | OD D: 90 mm | Length L: 127 mm | Keyway Width b: 18 mm (H8) | Keyway Depth t: 6.0 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: 3.3 kg | Shaft Mass: 15.6 kg/m | Options: High-temp (metal retainer, ≤100°C) | ||
| LBST70 | THK LBST70, D=100mm L=135mm heavy load long nut, CT=3000.0N·m | THK | Model: LBST70 | Type: LBST Ball Spline Nut, Heavy Load Long | OD D: 100 mm | Length L: 135 mm | Keyway Width b: 18 mm (H8) | Keyway Depth t: 6.0 mm | Dynamic Torque CT: 3000.0 N·m | Static Torque C0T: 6090.0 N·m | Dynamic Load C: 90.8 kN | Static Load C0: 164.0 kN | Nut Mass: 3.8 kg | Shaft Mass: 21.3 kg/m | Options: High-temp (metal retainer, ≤100°C); Felt seal option available | ||
| LBST85 | THK LBST85, D=120mm L=155mm heavy load long nut, CT=4740.0N·m | THK | Model: LBST85 | Type: LBST Ball Spline Nut, Heavy Load Long | OD D: 120 mm | Length L: 155 mm | Keyway Width b: 20 mm (H8) | Keyway Depth t: 7.0 mm | Dynamic Torque CT: 4740.0 N·m | Static Torque C0T: 9550.0 N·m | Dynamic Load C: 119.0 kN | Static Load C0: 213.0 kN | Nut Mass: 6.1 kg | Shaft Mass: 32.0 kg/m | Options: High-temp (metal retainer, ≤100°C); Felt seal option available | ||
| LBST100 | THK LBST100, D=140mm L=175mm heavy load long nut, CT=6460.0N·m | THK | Model: LBST100 | Type: LBST Ball Spline Nut, Heavy Load Long | OD D: 140 mm | Length L: 175 mm | Keyway Width b: 28 mm (H8) | Keyway Depth t: 9.0 mm | Dynamic Torque CT: 6460.0 N·m | Static Torque C0T: 14400.0 N·m | Dynamic Load C: 137.0 kN | Static Load C0: 271.0 kN | Nut Mass: 10.4 kg | Shaft Mass: 45.0 kg/m | Options: High-temp (metal retainer, ≤100°C); Felt seal option available | ||
| LBST120 | THK LBST120, D=160mm L=200mm heavy load long nut, CT=8380.0N·m | THK | Model: LBST120 | Type: LBST Ball Spline Nut, Heavy Load Long | OD D: 160 mm | Length L: 200 mm | Keyway Width b: 28 mm (H8) | Keyway Depth t: 9.0 mm | Dynamic Torque CT: 8380.0 N·m | Static Torque C0T: 19400.0 N·m | Dynamic Load C: 148.0 kN | Static Load C0: 306.0 kN | Nut Mass: 12.9 kg | Shaft Mass: 69.5 kg/m | Options: High-temp (metal retainer, ≤100°C) | ||
| LBST150 | THK LBST150, D=205mm L=250mm heavy load long nut, CT=13900.0N·m | THK | Model: LBST150 | Type: LBST Ball Spline Nut, Heavy Load Long | OD D: 205 mm | Length L: 250 mm | Keyway Width b: 32 mm (H8) | Keyway Depth t: 10.0 mm | Dynamic Torque CT: 13900.0 N·m | Static Torque C0T: 32200.0 N·m | Dynamic Load C: 196.0 kN | Static Load C0: 405.0 kN | Nut Mass: 28.0 kg | Shaft Mass: 116.6 kg/m | Options: High-temp (metal retainer, ≤100°C) |
