SDS Hammer / Chisel Drills FAQ

[Andrew Gabriel]

When pointing someone at this FAQ at

, I noticed an error in it...

"Hammer only, no rotation Not all models have this (sometimes the ones that do are called SDS+ drills). "

I believe this is incorrect. SDS+ (or SDS Plus) refers to one of the types of SDS chuck, of which there are (or rather, were) three formats:

SDS Original, became obsolete and vanished before SDS drills became widespread.

SDS+ (or SDS Plus) The most common format with two splines and two dimples on the bits, often now simply called SDS as the original SDS format has vanished.

SDS Max Larger chuck found on more powerful SDS drills, with (IIRC from memory)

3 splines on a slightly conical rear end of the bits.

[John Rumm]

Yup, I think this is probably out of date now... there was a brief period where they seemed to be using the + to denote ones with roto stop (even though in reality they all are SDS+ anyway) bu there seems to be no consistent use anymore.

[Doctor Drivel]

There is also SDS MAX fro the big stuff.

[Phil Addison]

The OP already told us that, and more....

Phil The uk.d-i-y FAQ is at

Google uk.d-i-y archive is at NOSPAM from address to email me