On Tuesday, June 25, 2024, 5:18 PM, Bill in OKC too via groups.io <wmrmeyers@...> wrote:

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!

Improvise, Adapt, and Overcome.
Physics doesn't care about your schedule.
The only reason I know anything is because I've done it wrong enough times to START to know better.

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