blackout5783
starting to spend too much on rocks
Member since November 2011
Posts: 248
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Post by blackout5783 on Dec 3, 2013 21:16:49 GMT -5
So after an unintended break from the restoration of my 24" Frantom, I'm back at it. I was able to remove the large pulley that is driven by the motor from the outer shaft of the arbor, but the smaller pulley that drives the power feed is being a thorn in my side.
The set screw is completely frozen and stripped. I mean 100% jammed in there. No amount of PB Blaster, Liquid Wrench, WD-40, acetone/ATF, etc has been able to loosen it. Looks like I'm stuck drilling it out.
My other issue is the actual removal of the pulley. The shaft is too long for the jaws of my gear puller to reach. I'm hesitant to use a pry bar on it because I don't want it to twist on the shaft and get further locked on there. All ideas are welcome!
I have to replace the arbor anyway (bearings are toasted), so if I have to destroy it to remove the pulley I'm OK with that. I just don't want to make more work later by screwing something up now.
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Post by DirtCleaner on Dec 3, 2013 21:59:03 GMT -5
Heat can help (but be very careful as pulleys are often aluminum) or with a wrench in it whack it with a hammer. After that drilling is an option. How about a photo so we can better give unprofessional advice.
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Dec 3, 2013 22:15:27 GMT -5
#1 - I suggest you tack weld an allen wrench into the set screw, it'll probably break free if heated by the welding and the allen wrench cannot slip/strip...
As for pulley puller's lack of reach, can you fabric a three leaf clover from some small cable, put it behind the pulley, then pull on the cable by putting the puller hooks in the end of the clover leaves?
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,560
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Post by jamesp on Dec 3, 2013 22:18:58 GMT -5
And they have aerosol liquid nitrogen to freeze the shaft.
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Post by catmandewe on Dec 3, 2013 22:35:52 GMT -5
Use a torch and heat up the set screw and then pour ATF on it while it is still hot (if you only have a hand torch then mapp gas heats faster which usually means less damage), might have to do it a few times but it usually works.
Tony
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Post by phil on Dec 3, 2013 22:56:13 GMT -5
Tried wintergreen oil on the set screw?
For the pulley length issue, sometimes it works if you use emery cloth and clean the shaft in the inside, and grease it, then tap the pulley onto the cleaned area. then clean what you exposed, lube and gently tap it out and off.
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Post by catmandewe on Dec 3, 2013 23:00:30 GMT -5
Tried wintergreen oil on the set screw? For the pulley length issue, sometimes it works if you use emery cloth and clean the shaft in the inside, and grease it, then tap the pulley onto the cleaned area. then clean what you exposed, lube and gently tap it out and off. When Woody posted that I bought some but I haven't had a chance to try it yet. Let us know if it works! Tony
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QuailRiver
fully equipped rock polisher
Member since May 2008
Posts: 1,640
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Post by QuailRiver on Dec 3, 2013 23:13:41 GMT -5
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The Dad_Ohs
fully equipped rock polisher
Take me to your Labradorite!!
Member since September 2012
Posts: 1,860
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Post by The Dad_Ohs on Dec 3, 2013 23:33:23 GMT -5
My suggestions would be as follows:
1) drill out set screw. You can always re-tap the hole to a next size larger or even a bolt.
2) remove the shaft completely and place a wrench behind the pulley that is as close to the size of the shaft as possible.
3) Heat the pulley carefully, evenly heating the pulley along the end closest to the end of the shaft.
4) One it gets red, place the wrench behind the shaft and begin tapping the wrench near the shaft with a heavy ball peen hammer.
You may have to heat it a few times, but try not to over heat it as you will cause the arbor to expand and make it harder to move the pulley off the shaft. this is a tried & true method I have used many time in the automotive field and it will work.... if you WD-40 it first be prepared for flames because it will burn and this might be a helpful thing as rust, if any, or corrosion will sometimes burn away creating a air gap.
Good Luck with it and let us know what you try and how it works.
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