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SDS-max
SDS-max is an 18 mm tool holder system developed by BOSCH for rotary-hammer and percussive application tools for drilling, chiselling and caulking with large hammers over 5 kg. The purpose of the introduction of this new tool fitting system was to standardise the tool-free switching of application tools for 80% of heavy-duty rotary hammers and hammer drills. Three ridges with a combined surface of 180 mm2 ensure loss-free torque transfer. The standardisation provided by the SDS-max tool fitting system has reduced the number of available types and has led to a reduction in stock keeping.
A shank
B tool holder
1 shank diameter 18 mm
2 closed grooves for
automatic locking
3 high concentricity through
approx. 90 mm tool guidance
4 3 open grooves with approx.
389 mm2 contact surface for
loss-free transfer of power
5 3 driving wedges in tool holder
with approx. 389 mm2 contact
surface
6 locking segments for safe
tool retention
7 shank of drill bit/chisel
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