Removing the stock pulley from the 3" CIM

[CMICK]

I'm trying to remove the pulley that comes on the big CIM motor. It looks like it is made for a belt. I know this has been talked about before on this board but I couldn't find the previous post.

I took the set screw out and put a small gear puller on the pulley but it won't budge.

Anybody have a hint for me?

Thanks for any help.

[Kevin Sevcik]

I've heard that it's glued on. Judicious application of heat loosens the adhesive and then your gear puller should work.

[Arefin Bari]

Originally Posted by CMICK

I'm trying to remove the pulley that comes on the big CIM motor. It looks like it is made for a belt. I know this has been talked about before on this board but I couldn't find the previous post.

I took the set screw out and put a small gear puller on the pulley but it won't budge.

Anybody have a hint for me?

Thanks for any help.

This gear puller does wonders. After you take the set screw out from the pulley, you have to heat it up, then use this gear puller to pull the pulley out slowly. Good luck.

[lukevanoort]

Heat up the gear. It is held on by a strong epoxy that weakens a large deal when heated. Last year we successfully used a Bunsen burner to heat it up.

[CMICK]

Thanks for the quick replies. I wasn't sure about putting heat to a shaft connected to a motor. I'll give it a try.

[Kirk]

Assuming you don't want to use the pulley these work great. Just tighten up the bolt and the pulley will crack in half. Doesn't risk damaging the motor with heat or any pulling.

You can get them at most hardware stores like sears. Home Depot might even have them. Look under nut splitters. Best of all they are CHEAP.

http://www.harborfreight.com/cpi/cta...emnumber=40929

[CMICK]

I got it off this morning.

I applied my gear puller pretty tight, then applied the smallest amount of heat from a propane torch and the gear began to slide. Applied a little more heat and pulled the gear off the rest of the way by hand, wearing gloves of course.

[Gabe]

BE VERY CAREFUL WITH HEAT!!! Just tried this method and both motors are now permanently damaged (The two motors arrived yesterday). The heat apparently loosened the adhesive that locks the armature to the shaft, and the shafts moved inward about 3/16". A Mapp gas torch was used to heat the pinion, and then a pin punch was used to hammer the shaft from the pinion. It didn't work. I then became frustrated and hammered the pinion on an anvil, which did work. The pinion to brittle enough to crack it with a hammer. I highly reccomend breaking the pinion to remove it rather than the application of heat, which may prove disastrous.

[Kirk]

Originally Posted by Gabe

BE VERY CAREFUL WITH HEAT!!! Just tried this method and both motors are now permanently damaged (The two motors arrived yesterday). The heat apparently loosened the adhesive that locks the armature to the shaft, and the shafts moved inward about 3/16". A Mapp gas torch was used to heat the pinion, and then a pin punch was used to hammer the shaft from the pinion. It didn't work. I then became frustrated and hammered the pinion on an anvil, which did work. The pinion to brittle enough to crack it with a hammer. I highly reccomend breaking the pinion to remove it rather than the application of heat, which may prove disastrous.

That is exactly why we use the nut splitter. Takes 30 sec and there is little to no risk of damage to the motor/shaft. Its well worth the $5-10 for the tool.

[Gabe]

Originally Posted by Kirk

That is exactly why we use the nut splitter. Takes 30 sec and there is little to no risk of damage to the motor/shaft. Its well worth the $5-10 for the tool.

I like using the nut splitter, and have used it before. Just that this time I did not have it around and I really needed it then and there, so I tried using heat.