Thank you for B`port help

===================== A caution -- if the high/low dog clutch is not fully engaged one way or the other and you power up, it will make the most god-awful racket until is seats/engages. If you are at high speed there is the potential to do damage, and even at low speed will engage with a tremendous "clunk" that can't be good for things. You may have to hold the spindle and turn the drive pulley by hand until you get the "clunk" indicating full engagement.

Also be very aware that shifting high/low reverses the rotation of the spindle/motor. A lot of tooling has "gone south" when even experienced machinists had a "brain fart" about this.

Be very careful about "climb" milling as there can be considerable slop/backlash in the slides of the older bridgeports.

Good luck, and having tried it, a bigger hammer is *NOT* the correct answer when something wont go.

FWIW -- I have had better results from end-mill holders than the R8 collets. If you use only one size shank[typically 3/8 or 1/2] you can get the effect of a quick change tool holder. You can also get a 1 inch or larger end-mill holder and make you own "quick change" set-up by machining adapters [bushings] for the actual tools.

Unka' George (George McDuffee) .............................. Only in Britain could it be thought a defect to be "too clever by half." The probability is that too many people are too stupid by three-quarters.

John Major (b. 1943), British Conservative politician, prime minister. Quoted in: Observer (London, 7 July 1991).