Seems like somewhere I remember a tool for removing broken taps that has steel fingers to insert in the flutes of a tap to remove a broken tap, anyone seen one?

Remember when drilling and tapping, drill the correct size hole and run the tap in with your Bridgeport before moving the table. Use back gear for the tap, of course. If the tap gets tight, it will spin in the chuck before breaking.

I routinely do this and never had a problem, however, on pure Al, unknown at the time, the tap started galling and I shut it down, got some Al alloy instead.

Ed

'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.