Antique Carpenters brace

Hi,
Twin engine, and the lower one needs the wings off to remove it.
Not easy to service.
Cheers

Quote:

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Originally Posted by 4bee

Mmmmmmm, not necessarily, Colin. Remember the Morse Taper drill bits? They were held in purely by friction of the taper & I suppose the upwards pressure from the work piece & they were, in my experience, driven faster than you ever could with a brace & the largest I ever used was for drilling Compressor parts, & would have been about 3/4" diam.

I'm not sure now whether was a square-ish top end to the drill though. Too any years have passed me by for that detail.



Ah, Google tells me there was. Bugger![bigsad]

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Morse taper shank drills and reamers are standard engineering tools. Drills are available up to 4" diameter. A 4" MT drill is a big and expensive lump of metal. Usually High Speed Steel or Cobalt High Speed Steel. MT drills are used in lathes, drill presses, milling machines, radial arm drills and many other machine tools. If the shank and socket are in good order and the drill is given a bit of a tap upwards with a soft hammer when mounting there is no slip. I have drills up to 1" in my shop.

Quote:

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Originally Posted by Bigbjorn

Morse taper shank drills and reamers are standard engineering tools. Drills are available up to 4" diameter. A 4" MT drill is a big and expensive lump of metal. Usually High Speed Steel or Cobalt High Speed Steel. MT drills are used in lathes, drill presses, milling machines, radial arm drills and many other machine tools. If the shank and socket are in good order and the drill is given a bit of a tap upwards with a soft hammer when mounting there is no slip. I have drills up to 1" in my shop.

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For those of you who are not engineering tradesmen, here is a link to a short course in machine tapers.

Machine taper - Wikipedia

Here is the catalogue of Morse taper drills, HSS standard length & shank, from Machine Shop Discount of New Jersey. They are an independent joint venture of the Bacharach family and Michigan Drill. Ignore the prices unless you plan to buy from them. US suppliers are typically half or less what the Australian rip-off brigades try to charge.

FYI a 4" MT drill is 27 1/2" long and heavy.

Sorry, forgot to add the link. Here it is.

https://www.msdiscounttool.com/catal....php?cPath=150