"Harry Bloomfield" wrote in message
Kevin pretended :
No it would be a physical impossibility.
A percussion mechanism where there are annular steps and a corresponding
opposing face as in many cheap hammer drills would be possible as long as
the drive is capable of being made to right angles... Just AFAIK no one has
actually bothered to make one or an adapter unit with hammer action.
Whereas the hammer action of an SDS is a more mechanised version with
pistons and sleeves in conjunction with an anvil device etc which would be
near impossible to achieve at a right angle
- show quoted text -
IMHO sds are not hammer drills. My understanding is that a hammer drill 'bangs' in line with the drill bit whereas the sds drill 'bangs' in the rotational element, no ? /q
if its how you imagine, how can you chisel with an SDS on 'rotary stop'?
On Fri, 29 Aug 2014 22:54:13 +0100, Harry Bloomfield
I have used the Hilti one. It works.
It's harder to press the drill bit into the hole, because the bit is in the
"wrong" direction wrt to the handle, but otherwise, it just works.
A straight forward hammer drill hammers using a pair of cogs facing
each other, rather like the cogs in a ratchet. Pressure on the drill
bit, forces the chuck to rise over each cog, then it is suddenly
released at the peak.
I'm not sure of the SDS principle of operation, but I understand a
piston is involved, which thumps up and down in line with the chuck. A
much slower hammer, but much stronger and more effective.
I don't see how either effect can be turned 90 deg. My best guess is
that the hammering is reproduced inside the Bosch gadget, from the
drills rotation, much like inside a hammer drill.
Yes: Hilti TE-AC, order number 70591.
This is a 90° drill head for a Hilti hammer drill. The instructions show that it
can be used with (and without) the hammer setting.
You may wish to find another way to solve the problem, as this solution has a
list price of 390.89 Euros.
No. SDS bangs in line with the drill bit, effectively with a small hammer
hammering on the back end of the drill bit, and a chuck clamping mechanism
which allows the bit to slide in and out in and out the chuck whilst being
firmly clamped rotationally (so the chuck isn't involved in transmitting
the hammer action to the bit, unlike a conventional hammer drill).
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