Someone stripped the nut on the motor side pulley. I’m looking to get in there to change the bearings. Anyone know why those nuts have that atypical shape to them with the slots, and where I could find a replacement?
Thanks!
I think it’s used because of the vibration a Skil 100 creates.
See if you have a specialty nut and bolt store near you. They should be able to help you out. If not, contact McMaster-Carr. They should be able to help you.
I just redid mine, and I cannot remember if this was a reverse thread screw
Chris
I believe you are right. I am going to deletes the McMaster-Carr link to avoid confusion
Never had one off, but it makes perfect sense that it would be counter clockwise ie reverse thread.
Like said below be sure you’re not turning it the wrong direction. It may be reverse thread. If it is, that’s probably the reason it’s stripped. You better be sure the nut is stripped and not the shaft. I am sure you can find a parts diagram on line.
And it is a 1/4”-28 left hand flex-top lock nut
Nice tear down pic. You have the sought after mushroom knob too.
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Yeah there is a parts diagram online. It’s the same nut for both the motor and cutter head shafts. And that answers the OP’s question as to why Skil used that nut. Reverse thread and a lock nut. And you can imagine how easy it would be to strip the nut or the thread on the shaft. Some guy with a ratchet and an extension standing on it in the wrong direction. I am sure the shaft is hardened steel and the nut is just regular steel for that very reason.
Thanks for the info. Very helpful.
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Did you get it off?
Google or go on ebay and search for “Impact Bolt Extractor Set Nut Remover Set Stripped Extraction Socket Tool 13PCS”.
These types of extractors might do the job if your vice grips don’t.
Yes, the nut came off with a drop of blaster and vise grips on the stripped nut. Threads on the shaft look good. Next step is getting the motor out.
That’s great to hear you got the nut off without any damage to the shaft threads.
Looking forward to seeing the progress on your planer refurb.
I see a three claw puller in the background. Did you have to modify the fingers to slide under the gears by thinning out the fingers?
We’re you able to pull the bearings with said puller too?
Yes. I think I got it at AutoZone. I ended up using an angle grinder to flatten and thin out the feet on the gear puller. This allowed it to get under the housing cover and pull the motor and assembly out all in one piece. I also used it for the bearings.
If yours is anything like mine and hadn’t been touched since the 1960s, I just kept slowly prying up the motor housing with a flat screwdriver, going around the housing in a circle until I could get the claws of the gear puller under it. I did have to grind the gear puller claws down pretty flat, unless you can find a smaller one. That and some penetrating oil (the best is a 50-50 mix of acetone and automatic transmission fluid) and sometimes lightly tapping with a small ball peen hammer will get the bearings off.
Thanks for the advice. I ended up buying a bearing splitter, but I am also going to buy a puller and grind the feet down.
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Very good. I am going to try your acetone/ transmission fluid mix. So many of these “as seen on TV rust busters are highly overrated.