Ball Splines and Bearings
Create a compact linear and rotary motion system for applications requiring complex, fast movements, such as robotics. The grooves on the ball splines transmit rotary power as ball bearings move smoothly and precisely along their length, even at high speeds.
Ball splines are alloy steel for high strength and wear resistance. They're hardened on the outside for additional wear resistance while the center is soft enough to absorb stress from shifting loads. Those with a step-down end have a shoulder near the end to stop gears, sprockets, and bearings.
Bearings have a retaining ring groove, so they can be positioned in your system with a retaining ring (not included). Bearings with a keyway include a machine key for attaching your load. Flanged bearings have a surface with mounting holes for attaching your load. Stainless steel bearings are more corrosion resistant than steel bearings.
Spline | Step | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dia., mm | Dia. Tolerance, mm | Lg., mm | Lg. Tolerance, mm | Lg., mm | No. of | Root Dia., mm | Dia., mm | Dia. Tolerance, mm | Lg., mm | Surface Smoothness, microinch | Edge Type | Hardness Rating | Hardness | Heat Treatment | Each | |
Metric—52100 Alloy Steel | ||||||||||||||||
Splined on Both Ends | ||||||||||||||||
| 6 | -0.012 to 0 | 150 | -0.7874 to 0.7874 | 150 | 4 | 5.3 | __ | __ | __ | 16 | Chamfered | Very Hard | Rockwell C60 | Case Hardened | 00000000 | 0000000 |
| 6 | -0.01 to 0 | 200 | -0.05 to 0.05 | 200 | 4 | 5.3 | __ | __ | __ | 16 | Chamfered | Very Hard | Rockwell C60 | Case Hardened | 000000000 | 000000 |
| 6 | -0.01 to 0 | 300 | -0.05 to 0.05 | 300 | 4 | 5.3 | __ | __ | __ | 16 | Chamfered | Very Hard | Rockwell C60 | Case Hardened | 000000000 | 000000 |
| 8 | -0.015 to 0 | 150 | -0.7874 to 0.7874 | 150 | 4 | 7.2 | __ | __ | __ | 16 | Chamfered | Very Hard | Rockwell C60 | Case Hardened | 00000000 | 000000 |
| 8 | -0.01 to 0 | 200 | -0.05 to 0.05 | 200 | 4 | 7.2 | __ | __ | __ | 16 | Chamfered | Very Hard | Rockwell C60 | Case Hardened | 000000000 | 000000 |
| 10 | -0.015 to 0 | 200 | -0.7874 to 0.7874 | 200 | 4 | 9 | __ | __ | __ | 16 | Chamfered | Very Hard | Rockwell C60 | Case Hardened | 00000000 | 000000 |
| 10 | -0.02 to 0 | 300 | -0.05 to 0.05 | 300 | 4 | 9 | __ | __ | __ | 16 | Chamfered | Very Hard | Rockwell C60 | Case Hardened | 000000000 | 000000 |
| 10 | -0.02 to 0 | 600 | -0.08 to 0.08 | 600 | 4 | 9 | __ | __ | __ | 16 | Chamfered | Very Hard | Rockwell C60 | Case Hardened | 000000000 | 000000 |
| 13 | -0.02 to 0 | 200 | -0.05 to 0.05 | 200 | 4 | 11.7 | __ | __ | __ | 16 | Chamfered | Very Hard | Rockwell C60 | Case Hardened | 000000000 | 00000 |
| 13 | -0.02 to 0 | 500 | -0.08 to 0.08 | 500 | 4 | 11.7 | __ | __ | __ | 16 | Chamfered | Very Hard | Rockwell C60 | Case Hardened | 000000000 | 000000 |
| 13 | -0.02 to 0 | 700 | -0.08 to 0.08 | 700 | 4 | 11.7 | __ | __ | __ | 16 | Chamfered | Very Hard | Rockwell C60 | Case Hardened | 000000000 | 000000 |
| 16 | -0.02 to 0 | 200 | -0.05 to 0.05 | 200 | 4 | 14.2 | __ | __ | __ | 16 | Chamfered | Very Hard | Rockwell C60 | Case Hardened | 000000000 | 000000 |
| 16 | -0.02 to 0 | 700 | -0.08 to 0.08 | 700 | 4 | 14.2 | __ | __ | __ | 16 | Chamfered | Very Hard | Rockwell C60 | Case Hardened | 000000000 | 000000 |
| 20 | -0.02 to 0 | 200 | -0.05 to 0.05 | 200 | 4 | 17.9 | __ | __ | __ | 16 | Chamfered | Very Hard | Rockwell C60 | Case Hardened | 000000000 | 000000 |
| 20 | -0.02 to 0 | 2,000 | -0.08 to 0.08 | 2,000 | 4 | 17.9 | __ | __ | __ | 16 | Chamfered | Very Hard | Rockwell C60 | Case Hardened | 000000000 | 000000 |
| 25 | -0.02 to 0 | 200 | -0.05 to 0.05 | 200 | 4 | 22.4 | __ | __ | __ | 16 | Chamfered | Very Hard | Rockwell C60 | Case Hardened | 000000000 | 000000 |
| 25 | -0.02 to 0 | 500 | -0.08 to 0.08 | 500 | 4 | 22.4 | __ | __ | __ | 16 | Chamfered | Very Hard | Rockwell C60 | Case Hardened | 000000000 | 000000 |
| 30 | -0.02 to 0 | 300 | -0.05 to 0.05 | 300 | 4 | 26.8 | __ | __ | __ | 16 | Chamfered | Very Hard | Rockwell C60 | Case Hardened | 000000000 | 000000 |
| 30 | -0.02 to 0 | 1,000 | -0.08 to 0.08 | 1,000 | 4 | 26.8 | __ | __ | __ | 16 | Chamfered | Very Hard | Rockwell C60 | Case Hardened | 000000000 | 000000 |
| 30 | -0.02 to 0 | 2,000 | -0.08 to 0.08 | 2,000 | 4 | 26.8 | __ | __ | __ | 16 | Chamfered | Very Hard | Rockwell C60 | Case Hardened | 000000000 | 00000000 |
| 40 | -0.02 to 0 | 400 | -0.05 to 0.05 | 400 | 4 | 35.5 | __ | __ | __ | 16 | Chamfered | Very Hard | Rockwell C60 | Case Hardened | 000000000 | 000000 |
| 40 | -0.02 to 0 | 700 | -0.08 to 0.08 | 700 | 4 | 35.5 | __ | __ | __ | 16 | Chamfered | Very Hard | Rockwell C60 | Case Hardened | 000000000 | 000000 |
Splined End × Step-Down End | ||||||||||||||||
| 18.2 | -0.021 to 0 | 350 | -0.7874 to 0.7874 | 200 | 4 | 16.4 | 15 | -0.018 to 0 | 150 | 16 | Chamfered | Very Hard | Rockwell C60 | Case Hardened | 00000000 | 000000 |
| 23 | -0.021 to 0 | 350 | -0.7874 to 0.7874 | 200 | 4 | 20.6 | 20 | -0.021 to 0 | 150 | 16 | Chamfered | Very Hard | Rockwell C60 | Case Hardened | 00000000 | 000000 |
| 28 | -0.021 to 0 | 450 | -0.7874 to 0.7874 | 300 | 4 | 24.8 | 25 | -0.021 to 0 | 150 | 16 | Chamfered | Very Hard | Rockwell C60 | Case Hardened | 00000000 | 000000 |
| 37.4 | -0.025 to 0 | 550 | -0.7874 to 0.7874 | 400 | 4 | 33.1 | 30 | -0.021 to 0 | 150 | 16 | Chamfered | Very Hard | Rockwell C60 | Case Hardened | 00000000 | 000000 |
Material | Keyway | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Spline Dia., mm | For No. of Splines | Overall Lg., mm | OD, mm | Bearing | Ball | Dynamic Load Cap., lbs. | Max. Dynamic Torque, in.-lbs. | With Retaining Ring Grooves | Includes | Dp., mm | Lg., mm | Wd., mm | Each | |
| 6 | 4 | 25 | 14 | Steel | Steel | 270 | 13 | Yes | Machine Key | 1.2 | 10.5 | 2.5 | 00000000 | 000000 |
| 6 | 4 | 25 | 14 | Stainless Steel | Stainless Steel | 270 | 13 | Yes | Machine Key | 1.2 | 10.5 | 2.5 | 00000000 | 000000 |
| 8 | 4 | 25 | 16 | Steel | Steel | 325 | 18 | Yes | Machine Key | 1.2 | 10.5 | 2.5 | 00000000 | 00000 |
| 10 | 4 | 33 | 21 | Steel | Steel | 610 | 38 | Yes | Machine Key | 1.5 | 13 | 3 | 00000000 | 00000 |
| 13 | 4 | 36 | 24 | Steel | Steel | 600 | 185 | Yes | Machine Key | 1.5 | 15 | 3 | 00000000 | 00000 |
| 13 | 4 | 36 | 24 | Stainless Steel | Stainless Steel | 600 | 185 | Yes | Machine Key | 1.5 | 15 | 3 | 00000000 | 000000 |
| 16 | 4 | 50 | 31 | Steel | Steel | 1,350 | 531 | Yes | Machine Key | 2 | 17.5 | 3.5 | 00000000 | 00000 |
| 18.2 | 4 | 60 | 32 | Steel | Steel | 1,750 | 734 | Yes | Machine Key | 2.5 | 26 | 4 | 00000000 | 000000 |
| 25 | 4 | 71 | 42 | Steel | Steel | 2,850 | 1,672 | Yes | Machine Key | 2.5 | 36 | 4 | 00000000 | 000000 |
| 28 | 4 | 80 | 45 | Steel | Steel | 4,150 | 2,557 | Yes | Machine Key | 4 | 41 | 7 | 00000000 | 000000 |
| 30 | 4 | 80 | 47 | Steel | Steel | 4,150 | 2,716 | Yes | Machine Key | 2.5 | 42 | 4 | 00000000 | 000000 |
| 40 | 4 | 100 | 64 | Steel | Steel | 6,900 | 5,964 | Yes | Machine Key | 3.5 | 52 | 6 | 00000000 | 000000 |
Material | Mounting Hole | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Spline Dia., mm | For No. of Splines | Overall Lg., mm | Flange OD, mm | OD, mm | Bearing | Ball | Dynamic Load Cap., lbs. | Max. Dynamic Torque, in.-lbs. | With Retaining Ring Grooves | No. of | Thread Size | Each | |
| 6 | 4 | 25 | 30 | 14 | Steel | Steel | 270 | 13 | Yes | 4 | M3 × 0.5 mm | 00000000 | 000000 |
| 8 | 4 | 25 | 32 | 16 | Steel | Steel | 325 | 18 | Yes | 4 | M3 × 0.5 mm | 00000000 | 00000 |
| 10 | 4 | 33 | 42 | 21 | Steel | Steel | 610 | 38 | Yes | 4 | M4 × 0.7 mm | 00000000 | 000000 |
| 13 | 4 | 36 | 43 | 24 | Steel | Steel | 600 | 185 | Yes | 4 | M4 × 0.7 mm | 000000000 | 00000 |
| 16 | 4 | 50 | 50 | 31 | Steel | Steel | 1,350 | 531 | Yes | 4 | M4 × 0.7 mm | 000000000 | 000000 |
| 18.2 | 4 | 60 | 51 | 32 | Steel | Steel | 1,750 | 734 | Yes | 4 | M4 × 0.7 mm | 00000000 | 000000 |
| 20 | 4 | 63 | 58 | 35 | Steel | Steel | 2,000 | 929 | Yes | 4 | M5 × 0.8 mm | 000000000 | 000000 |
| 23 | 4 | 70 | 60 | 37 | Steel | Steel | 2,750 | 1,433 | Yes | 4 | M5 × 0.8 mm | 00000000 | 000000 |
| 25 | 4 | 71 | 65 | 42 | Steel | Steel | 2,850 | 1,672 | Yes | 4 | M5 × 0.8 mm | 000000000 | 000000 |
| 28 | 4 | 80 | 70 | 45 | Steel | Steel | 4,150 | 2,557 | Yes | 4 | M6 × 1 mm | 00000000 | 000000 |
| 30 | 4 | 80 | 75 | 47 | Steel | Steel | 4,150 | 2,716 | Yes | 4 | M6 × 1 mm | 000000000 | 000000 |
| 37.4 | 4 | 100 | 90 | 60 | Steel | Steel | 6,900 | 5,637 | Yes | 4 | M8 × 1.25 mm | 00000000 | 000000 |
| 40 | 4 | 100 | 100 | 64 | Steel | Steel | 6,900 | 5,964 | Yes | 4 | M8 × 1.25 mm | 000000000 | 000000 |
Sleeve Splines and Bearings
Often used in wet and dirty environments, these sleeve splines and bearings create a compact linear and rotary motion system. The grooves on the splines transmit rotary power as the sleeve bearing moves freely along their length. Sleeve bearings don't have moving parts that can be damaged from dirt and debris. And they don't need to be lubricated, making them overall lower maintenance than ball bearings.
Splines are PTFE coated to reduce friction, so bearings slide smoothly and last longer. They’re stainless steel, so they won’t rust.
Bearings are plastic with a bronze shell, so they won't rust. Threaded bearings allow you to mount your load directly to the bearing. Anti-backlash bearings minimize the space (play) between the bearing and spline for more accurate, repeatable positioning.
Flanges work with threaded bearings to give you a surface with mounting holes to attach your load.
For technical drawings and 3-D models, click on a part number.
Spline | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | No. of | Lg. | Lg. Tolerance | Root Dia. | Material | Edge Type | Hardness Rating | Hardness | Each | |
1/4" Dia. (Tolerance: -0.002" to 0.002") | ||||||||||
| 12" | 14 | 12" | 0" to 0.25" | 0.202" | PTFE-Coated 304 Stainless Steel | Straight | Medium | Rockwell B70 | 0000000 | 000000 |
| 24" | 14 | 24" | 0" to 0.25" | 0.202" | PTFE-Coated 304 Stainless Steel | Straight | Medium | Rockwell B70 | 0000000 | 000000 |
| 36" | 14 | 36" | 0" to 0.25" | 0.202" | PTFE-Coated 304 Stainless Steel | Straight | Medium | Rockwell B70 | 0000000 | 000000 |
3/8" Dia. (Tolerance: -0.002" to 0.002") | ||||||||||
| 12" | 16 | 12" | 0" to 0.25" | 0.306" | PTFE-Coated 304 Stainless Steel | Straight | Medium | Rockwell B70 | 0000000 | 00000 |
| 24" | 16 | 24" | 0" to 0.25" | 0.306" | PTFE-Coated 304 Stainless Steel | Straight | Medium | Rockwell B70 | 0000000 | 000000 |
| 36" | 16 | 36" | 0" to 0.25" | 0.306" | PTFE-Coated 304 Stainless Steel | Straight | Medium | Rockwell B70 | 0000000 | 000000 |
1/2" Dia. (Tolerance: -0.002" to 0.002") | ||||||||||
| 12" | 18 | 12" | 0" to 0.25" | 0.419" | PTFE-Coated 304 Stainless Steel | Straight | Medium | Rockwell B70 | 0000000 | 00000 |
| 24" | 18 | 24" | 0" to 0.25" | 0.419" | PTFE-Coated 304 Stainless Steel | Straight | Medium | Rockwell B70 | 0000000 | 000000 |
| 36" | 18 | 36" | 0" to 0.25" | 0.419" | PTFE-Coated 304 Stainless Steel | Straight | Medium | Rockwell B70 | 0000000 | 000000 |
| For Spline Diameter | Number of Splines | OD | Overall Length | Dynamic Load Capacity, lbs. | Static Load Capacity, lbs. | Max. Dynamic Torque | Max. Static Torque | Bearing Material | Shell Material | Each | |
| 1/4" | 14 | 1/2" | 3/4" | 5 | 5 | Not Rated | Not Rated | Plastic | Bronze | 0000000 | 000000 |
| 3/8" | 16 | 5/8" | 1" | 10 | 10 | Not Rated | Not Rated | Plastic | Bronze | 0000000 | 00000 |
| 1/2" | 18 | 13/16" | 1 1/2" | 15 | 15 | Not Rated | Not Rated | Plastic | Bronze | 0000000 | 00000 |
| For Spline Diameter | Number of Splines | OD | Overall Length | Thread Size | Dynamic Load Capacity, lbs. | Static Load Capacity, lbs. | Max. Dynamic Torque | Max. Static Torque | Bearing Material | Shell Material | Each | |
| 1/4" | 14 | 1/2" | 3/4" | 7/16"-20 | 5 | 5 | Not Rated | Not Rated | Plastic | Bronze | 0000000 | 000000 |
| 3/8" | 16 | 5/8" | 1" | 9/16"-20 | 10 | 10 | Not Rated | Not Rated | Plastic | Bronze | 0000000 | 00000 |
| 1/2" | 18 | 13/16" | 1 1/2" | 3/4"-20 | 15 | 15 | Not Rated | Not Rated | Plastic | Bronze | 0000000 | 00000 |
| For Spline Diameter | Number of Splines | OD | Overall Length | Thread Size | Dynamic Load Capacity, lbs. | Static Load Capacity, lbs. | Max. Dynamic Torque | Max. Static Torque | Bearing Material | Shell Material | Each | |
| 1/4" | 14 | 1/2" | 3/4" | 7/16"-20 | 5 | 5 | Not Rated | Not Rated | Plastic | Bronze | 0000000 | 000000 |
| 3/8" | 16 | 5/8" | 1" | 9/16"-20 | 10 | 10 | Not Rated | Not Rated | Plastic | Bronze | 0000000 | 00000 |
| 1/2" | 18 | 13/16" | 1 1/2" | 3/4"-20 | 15 | 15 | Not Rated | Not Rated | Plastic | Bronze | 0000000 | 00000 |
