Roto Hammer Question – 7/8″, 1″, 1 1/8″
I am shopping for a rotohammer (SDS as I still have a stable of bits from a previuosly owned but now dead Bosch) and am wondering what is being referred to when they say 7/8″, 1″, 1 1/8″ as it appears they all accept what I believe is a 3/8″ shank bit. Any helpful insight would be appreciated. Also any opinions on recommended makes/ models welcome – for infrequent 1/2″-3/4″ masonry drilling.
Those numbers are the recommended maximum size of the hole that the tool will drill occasionally, and not wear out prematurely. Per the manufacturer.
Generally, half that value is the hole size for frequent use. Again, for the tool to have a normal service life.
So if you're drilling 3/4" holes infrequently, a 3/4" rated tool would be fine. If you were planning to drill 3/4" holes all day long, a 1.5" tool is what you'd want.
Thanks, Cliff, seems to answer it pretty clearly and completely.