Re: Atlas milling machine with a stuck arbor
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ATF & acetone, Liquid Wrench, PB B'laster, WD-40 all work to some extent, but in my experience they all fall short of the real king of the hill - Kroil.? You can get it in aerosol cans as Aero Kroil, and there is a version with silicone called Sili Kroil.? It can be hard to find and expensive - I paid just about $100 for a gallon can at my local NAPA the other day - but it seems to work when the others won't.? Apply it and let it soak in over a period of time, tapping or twisting or pulling each time you add more, and you may just find the arbor on the floor the next time you pass.? Patience is a virtue.
I've got to take the bed off my 17 year old Ranger to replace a frame crossmember, and will start the Kroil treatment on the bed bolts tomorrow.? Perhaps by sometime next week they'll all be loose, but I don't expect it to take that long.
You've heard the old Army saying?'If?it moves, salute it. If it doesn't move, pick it up. If you can't pick it up, paint it.'? My version would be "If you want it loose, Kroil.? If you think you (or some other poor bastard) will need it loose again, Never Seez".
That's my story, and I'm sticking to it.
I believe I'd try a few other things before I started beating on the spindle...
WD-40 will work to loosen lightly rusted parts. Spray it several times a day, and give it a thump with a rubber mallet, deadbolt hammer, brass/bronze or lead hammer, and spray it again. Repeat several times a day. This has worked for me a bunch of times.
?Lotsa folks swear by ATF & acetone 50/50 as a penetrating oil. ATF is automatic transmission fluid, and brand or specification doesn't seem to matter.?
Relatively recently I've developed a fondness for PB Blaster. Seems to work better & faster when I have it. Use it the same way as described for WD-40, and the ATF & acetone likewise.?
If all else fails, or you're in a hurry, Jon's method will work, or you can switch methods. Persist, and something will break it loose eventually. Just be careful not to lose your temper. Don't ask.? :)
William R. Meyers, MSgt, USAF(Ret.)
Aphorisms to live by: Good judgement comes from experience. Experience comes from bad judgement.? SEMPER GUMBY!
Expect in one hand, expectorate in the other. See which one gets full first.
On Tuesday, June 25, 2024 at 04:05:55 PM CDT, Jon Elson <elson@...> wrote:
On 6/25/24 15:31, eddembowski wrote: Has anyone had this problem? The machine is really in good
shape but I can't take the arbor off.
Yes, I had a Bridgeport mill with the M head and Brown and Sharpe #7 taper with an end mill holder rusted in place.? Using the mill as is, I built a set of U-shaped wedges to pry against the spindle nose and the holder.? Then, I applied gentle torch heat to the spindle, and finally ice to the holder.? Then, I started pounding on the drawbar.? Finally, there was a thud, and the holder broke free. Jon
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