Quote:
Originally Posted by Oblarg
Do you find that putting one of these on a standard drill press holds tight enough tolerances for tube/gusset plate constructions? We've been doing those purely by match-drilling, but being able to drill them independently would be very nice.
Also, if you do have your drill press set up with one of these, do you just use an edge finder in the drill press the same way you would on a mill?
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I find that each hole needs to be center-punched, even with an X-Y table, because the bit tends to wander otherwise. Considering that, I don't use an edge finder but line it up by eye.
I suppose one could use a center drill; in this case, I'd still edge it up by eye. Don't expect to hold 0.001" tolerances, and I can judge 0.005 by eye if I'm careful.
Quote:
Originally Posted by asid61
Drill presses are not designed AT ALL for milling.
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Quote:
Originally Posted by Travis Schuh
but I would highly recommend against doing milling.
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I thought that was clear in my post, but perhaps not.
Think of cutting a slot 2" long in 1/8" aluminum tubing: Drill holes at the endpoints, cut out the slot, then finish it with a mill in a drill press. Or other light milling. Hogging out metal from a chunk is unlikely to work well, simply because the drill press table will move (I don't care how tight you clamp it).
Spindle bearings are angular roller bearings. Their failure mode is quite predictable and safe: They get noisy. That's why they are used for car wheel axles: Even in a very bad case, the wheel stays on. Wobbles maybe, but stays on (at least until the spindle breaks off).