Mainshaft Inspection

Mainshaft Inspection





1. Inspect the gear surface and bearing surface for wear and damage, then measure the mainshaft at points A, B, C, D, and E. If any part of the mainshaft is less than the service limit (except E), replace it with a new one.
Standard:
A (Ball bearing surface): 25.987 - 26.000 mm (1.0231 - 1.0236 inch)
B (Distance collar surface): 28.992 - 29.005 mm (1.1414 - 1.1419 inch)
C (Needle bearing surface): 34.984 - 35.000 mm (1.3773 - 1.3780 inch)
D (Ball bearing surface): 25.977 - 25.990 mm (1.0227 - 1.0232 inch)
E (Pilot bearing surface): 14.870 - 14.890 mm (0.5854 - 0.5862 inch)
Service Limit:
A: 25.93 mm (1.021 inch)
B: 28.93 mm (1.139 inch)
C: 34,93 mm (1.375 inch)
D: 25.92 mm (1.021 inch)





2. Inspect the runout by supporting both ends of the mainshaft. Rotate the mainshaft two complete revolutions when measuring the runout. If the runout is more than the service limit, replace the mainshaft with a new one.
Standard: 0.02 mm (0.001 inch) max.
Service Limit: 0.05 mm (0.002 inch)