Ball Spline Assembly
The PowerTorq™ Ball Spline assembly uses rolling elements to carry a load similar to an anti-friction (ball) bearing. These elements do not wear when properly lubricated during normal use. The closed path that the bearing balls follow through the outer race is referred to as a circuit. The number of potential circuits varies with the diameter of the spline shaft. When a circuit is loaded with bearing balls, it is referred to as an "active circuit".
PowerTorq™ inner races are made of high quality 4150 alloy steel, induction hardened to Rc 56-60. PowerTorq™ outer races are made of hardened steel with ball tracks heat treated to Rc 56-60. PowerTorq™ ball spline inner and outer races are protected with a black oxide finish.
PowerTorq™ Ball Splines are straight within .010 in/ft when shipped from the factory, and do not exceed .030 inch in any 6 foot section. Twist is limited to .015 in/ft at the ball circle diameter.
| Inner Race | Outer Race | |||||||
|---|---|---|---|---|---|---|---|---|
| Product Info | Details | Product Info | Details | Performance Specifications | ||||
| Product | Nominal Diameter [in] | Active Circuits | Root Diameter [in] | Part Number | Ball Return | Dynamic Torque [in-lb] | Static Torque [in-lb] | |
| PowerTorq 0375-3-0156 HPR6900 | 0.375 | 3 | 0.20 | HPR6900 | Cast | 200 | 626 | Specs Configure/Quote |
| PowerTorq 0625-6-0187 HPR8943 | 0.625 | 6 | 4.25 | HPR8943 | Cast | 1770 | 3540 | Specs Configure/Quote |
| PowerTorq 1000-6-0187 HPR8944 | 1.000 | 6 | 0.80 | HPR8944 | Cast | 2600 | 7800 | Specs Configure/Quote |
| PowerTorq 1500-6-0250 SOR8945 | 1.500 | 6 | 1.25 | SOR8945 | Stamped | 8400 | 23170 | Specs Configure/Quote |
| PowerTorq 1500-6-0250 HPR8945 | 1.500 | 6 | 1.25 | HPR8945 | Cast | 8400 | 23170 | Specs Configure/Quote |
| PowerTorq 2000-6-0312 HPR8946 | 2.000 | 6 | 1.67 | HPR8946 | Cast | 16000 | 40270 | Specs Configure/Quote |
| PowerTorq 2500-6-0375 HPR8947 | 2.500 | 6 | 2.10 | HPR8947 | Cast | 27000 | 62250 | Specs Configure/Quote |