Western Machine Works reverse engineered and manufactured a new shaft for a motor armature. The old shaft was severely damaged and repairing it was not a viable option. Western Machine Works’ engineering group took on the challenge of generating the manufacturing drawings and verifying all critical fits. The armature bore was precision machined to 100% concentricity and the new shaft was installed with the required interference fit.
- Part: 3000 HP Motor Armature
- Existing shaft was damaged beyond repair.
- No detailed manufacturing drawings exist.
- Dimensionally inspect existing shaft to generate manufacturing drawings.
- Work with the customer to correctly dimension all critical fits.
- Cut off the existing shaft on both sides of the armature.
- Set up armature in VBM to bore out the remaining shaft.
- Machine armature bore to 100% concentricity.
- Manufacture new shaft out of 4140 alloy steel.
- Freeze new shaft in liquid nitrogen and install to the armature with interference fit.
- Set up armature and shaft in the lathe, and machine slip rings to 100% concentricity.
- Balance to ISO G1.0 specification.
- QC to inspect and approve prior to shipping.
With precision machining and reverse engineering, the new shaft fit in the armature perfectly.