ACRA Mill Head Repair

kmitchl · Jul 2, 2019

I have an ACRA Model 18VH vertical mill variable speed head disassembled to repair the drive components. I had expected to find some plastic bushings in the drive pulleys as is common in BP's and several other brands. However, as best I can tell there are no bushings. The movable pulleys are machined to run directly on the shaft. The sliding spindle drive pulley seems to be in good shape. The motor sliding drive pulley has about 0.017" clearance over the motor drive sleeve. Also the movable motor drive pulley has a bearing surface only at the top near the belt track. has anyone run into this before? Any creative repairs?

Thanks,

Keith

awake · Jul 2, 2019

Any pictures available?

kmitchl · Jul 2, 2019

awake said:
Any pictures available?

Lower motor pulley and motor shaft sleeve. Keyway on sleeve is trashed but not a big deal.

Top of motor drive pulley showing bearing surface

Bottom of lower drive pulley showing no bearing surface

kmitchl · Jul 2, 2019

awake said:
Any pictures available?

Lower motor pulley non-bearing end diameter

Lower motor pulley bearing diameter

Motor sleeve diameter

kmitchl · Jul 11, 2019

Well the good news is I have been able to obtain repair parts from ACRA. The parts are a better design than the original. The bushing in the original lower motor pulley was about an inch long. The new pulley has a bushing that is about 3 inches long. Failing finding the repair parts I was prepared to bore out the original part and make an insert to press in.

Search

Largest Manufacturing Technology Community on the Web

Search

ACRA Mill Head Repair

kmitchl

Plastic

awake

Titanium

kmitchl

Plastic

kmitchl

Plastic

kmitchl

Plastic

Similar threads