Shaft Key and Keyway Calculator
Find the parallel key and keyway for a shaft to DIN 6885-1, with the keyway depths, the width tolerances for the fit you want, and the sizes to measure. Add a torque to estimate how long the key needs to be.
Results
Key:
- Keyway depth in the shaft, t1
- Keyway depth in the hub, t2
- Measure over the shaft keyway, d − t1
- Measure across the hub keyway, d + t2
- Shaft keyway width
- Hub keyway width
- Key width tolerance (h9)
- Key length for the torque
Key length is estimated from the pressure on the hub side of the key, p = 2T / (d (h − t1) l), with a round-ended form A key, whose ends do not carry load. Standard key lengths are used. Check shock loads, fatigue and the hub strength separately.
DIN 6885-1 parallel keys
| Shaft diameter, mm | Key b × h | Shaft depth t1 | Hub depth t2 | Depth tolerance |
|---|