I recently bought a bunch of masonry drill bits at a boot sale. Most either fit in a chuck or are SDS. However, a few have triangular shanks which I've not come across before. The bits are not huge, I guess between 12 - 20mm. The triangular part is about 1/2" across the flats and about 1" long.
I've tried various search terms with no luck. Does anyone know what type they are and what drill takes them?
John
Hand brace, from memory, or standard three jaw chuck.
A normal chuck has three jaws and should grip them without a problem. I have a couple of bits with hex shanks that are for use in a three jaw chuck.
A carpenters hand brace took tapered square shank bits. There may be other types of hand brace.
Yes, hand brace. I have a set of screwdriver bits like that. Not sure I'd ever need a masonry bit in a brace though
Certainly not a hand brace. They tend to have square shanks. It looks too chunky for a normal drill chuck though I've not tried it in one. Certainly the marks on it look like it fits in a purpose designed triangular fitting.
John
ISTR that Hilti had their own "standard" in the days before SDS.
try google
try google
sorry for double post chair keyboard interface error
Dunno. This one looks quite good:
It agrees with what I said so it must be good.
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