![[THK] — LBG Rotary Ball Spline with Gear (Gear-Integrated Unit)](https://prosourcemro.com/wp-content/uploads/2026/05/001-967-1024x803.png)
Ball Splines
THK
[THK] — LBG Rotary Ball Spline with Gear (Gear-Integrated Unit)
Family ID: THK-LBG-BALL-SPLINE
THK LBG-type Rotary Ball Spline — gear machined on LBR-type flange outer diameter, with radial and thrust needle bearings integrated as a compact unit. Optimized for spline-nut-driven torque transmission mechanisms. Helical and worm gear variants available on request. Sizes: LBG20–LBG85.
7 product codes available in this family
Product Codes & Specifications
| Product Code | Description | Brand | Spec | ||
|---|---|---|---|---|---|
| LBG20 | THK LBG20, D=30mm gear m=2.0 z=26, CT=90.2N·m | THK | Model: LBG20 | Type: LBG Rotary Ball Spline, Gear-Integrated Unit | Nut OD D: 30 mm | Length L: 60 mm | Gear OD D4: 47 mm | Gear Width L1: 20 mm | H: 12 mm | E: 24 mm | Gear Tip Circle D5: 56 mm | Gear PCD: 52 mm | Module m: 2.0 | Teeth z: 26 | 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 | Static Moment MA: 103.0 N·m | Unit Mass: 0.61 kg | Shaft Mass: 1.8 kg/m | Options: Felt seal option available | ||
| LBG25 | THK LBG25, D=40mm gear m=2.5 z=26, CT=176.0N·m | THK | Model: LBG25 | Type: LBG Rotary Ball Spline, Gear-Integrated Unit | Nut OD D: 40 mm | Length L: 70 mm | Gear OD D4: 60 mm | Gear Width L1: 23 mm | H: 14 mm | E: 28 mm | Gear Tip Circle D5: 70 mm | Gear PCD: 65 mm | Module m: 2.5 | Teeth z: 26 | 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 | Static Moment MA: 171.0 N·m | Unit Mass: 1.4 kg | Shaft Mass: 2.7 kg/m | Options: Felt seal option available | ||
| LBG30 | THK LBG30, D=45mm gear m=2.5 z=28, CT=312.0N·m | THK | Model: LBG30 | Type: LBG Rotary Ball Spline, Gear-Integrated Unit | Nut OD D: 45 mm | Length L: 80 mm | Gear OD D4: 65 mm | Gear Width L1: 27 mm | H: 16 mm | E: 32 mm | Gear Tip Circle D5: 75 mm | Gear PCD: 70 mm | Module m: 2.5 | Teeth z: 28 | 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 | Static Moment MA: 295.0 N·m | Unit Mass: 2.1 kg | Shaft Mass: 3.8 kg/m | Options: Felt seal option available | ||
| LBG40 | THK LBG40, D=60mm gear m=3.0 z=30, CT=696.0N·m | THK | Model: LBG40 | Type: LBG Rotary Ball Spline, Gear-Integrated Unit | Nut OD D: 60 mm | Length L: 100 mm | Gear OD D4: 85 mm | Gear Width L1: 31 mm | H: 18 mm | E: 41 mm | Gear Tip Circle D5: 96 mm | Gear PCD: 90 mm | Module m: 3.0 | Teeth z: 30 | 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 | Static Moment MA: 586.0 N·m | Unit Mass: 3.0 kg | Shaft Mass: 6.8 kg/m | Options: Felt seal option available | ||
| LBG50 | THK LBG50, D=75mm gear m=3.0 z=35, CT=1290.0N·m | THK | Model: LBG50 | Type: LBG Rotary Ball Spline, Gear-Integrated Unit | Nut OD D: 75 mm | Length L: 112 mm | Gear OD D4: 100 mm | Gear Width L1: 32 mm | H: 20 mm | E: 46 mm | Gear Tip Circle D5: 111 mm | Gear PCD: 105 mm | Module m: 3.0 | Teeth z: 35 | 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 | Static Moment MA: 941.0 N·m | Unit Mass: 4.1 kg | Shaft Mass: 10.6 kg/m | Options: Felt seal option available | ||
| LBG60 | THK LBG60, D=90mm gear m=3.5 z=36, CT=1870.0N·m | THK | Model: LBG60 | Type: LBG Rotary Ball Spline, Gear-Integrated Unit | Nut OD D: 90 mm | Length L: 127 mm | Gear OD D4: 120 mm | Gear Width L1: 38 mm | H: 22 mm | E: 52.5 mm | Gear Tip Circle D5: 133 mm | Gear PCD: 126 mm | Module m: 3.5 | Teeth z: 36 | 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 | Static Moment MA: 1300.0 N·m | Unit Mass: 6.3 kg | Shaft Mass: 15.6 kg/m | Options: Standard only | ||
| LBG85 | THK LBG85, D=120mm gear m=4.0 z=40, CT=4740.0N·m | THK | Model: LBG85 | Type: LBG Rotary Ball Spline, Gear-Integrated Unit | Nut OD D: 120 mm | Length L: 155 mm | Gear OD D4: 150 mm | Gear Width L1: 40 mm | H: 26 mm | E: 64.5 mm | Gear Tip Circle D5: 168 mm | Gear PCD: 160 mm | Module m: 4.0 | Teeth z: 40 | 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 | Static Moment MA: 3180.0 N·m | Unit Mass: 11.8 kg | Shaft Mass: 32.0 kg/m | Options: Felt seal option available |
