Drill bit to big for chuck, such thing as converter

Sep 01, 2017 9 Replies

I have a drill bit (Draper tools part number is 41798) and i wanted to use it in conjunction with a footprint hand drill, however the drill bit will n ot fit in the drill's chuck (drill bit is a bit big), can anyone tell me if there is a way to get round this with some kind of converter or adaptor



All1


This is usually the easiest way

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Available singly in all sizes, eBay etc.

snipped-for-privacy@gmail.com has brought this to us :

Drill shanks are usually quite soft steel, if you could borrow the use of a lathe and turn the shank down - providing it is not much smaller..

Didn't realise until checking that this is a wood drill. Is your hand drill a ratchet brace? These normally take a slightly odd tapered square shank.

If it has a normal three jaw chuck it would be easy enough to grind down the shank in an approximate hex geometry using an angle grinder.

Do you have no other drill? Unless you are doing serious restoration in oak, the easy way to drill 12 mm holes in wood is with a spade bit and a cordless drill. Or a forstner or auger, if you want a bit more accuracy.

if a (turned down?) 12mm shank won't fit, surely 1/2" won't either

I have seen these with 10mm shanks. Many cordless drills won't take more than 10mm.

Personally I would consider using a flat bit which will usually have a 6 sided 1/4" shank.

Thanks you Dennis this is a perfect answer for me, many thanks to everyone else for replying as well, thanks folks

All1

3/8, which is a bit less.

Bill

That may be on some, my Bosch can certainly take 10mm, though with little room to spare.

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