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Author Topic: Bridgeport quilmaster QRA replacement  (Read 7472 times)

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Bridgeport quilmaster QRA replacement
« on: August 07, 2025, 09:06:16 pm »
Hey guys, tossing this out there as an idea for any of you who are missing the QRA to your quillmaster: DeWalt 90deg drill heads are an *almost drop in replacement. I am in the process of restoring a broken quillmaster that I got from a retired toolmaker, needed a fair bit of brazing, but you probably wouldn't know it now without opening it up! But I only have 1 collet for this tool, and no QRA, so the uses are pretty limited. Replacements for the QRA are absurd, 250 on eBay now gets you one that looks like it has gone through a garbage disposal. Anyways, if one were inspired to do so, adapting the DeWalt tool to the quillmaster would be easy, and as the bearings and gearing are decent, I suspect adapting a cutter to it would be pretty manageable.
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Re: Bridgeport quilmaster QRA replacement
« Reply #1 on: August 08, 2025, 07:38:14 am »
Gearing is more solid than on the quillmaster itself, as this 90 is "impact ready" shown is with a WW collet wink wink. If the front bearing were tightened up and lengthened, I do not have any doubts this could cut decently. Thrust bearing is tough though, as this doesn't really have any retainment preload.
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Re: Bridgeport quilmaster QRA replacement
« Reply #2 on: August 08, 2025, 08:22:11 am »
Interesting adaptation!

Looks almost as if it were "made for that"!?!?!    ;c)
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Re: Bridgeport quilmaster QRA replacement
« Reply #3 on: August 08, 2025, 03:57:01 pm »
Lol it is indeed going to be with significant effort! Attached are what an adapter would look like, as well as shitily drawn-ings lol
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Re: Bridgeport quilmaster QRA replacement
« Reply #4 on: August 09, 2025, 10:36:05 am »
Nice re-purpose!

I often scour the shelves and bins in a hardware store with an eye towards making something useful to me with parts for or from something else.
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