SONTHEIM. Ready for the worst‑case scenario. The latest generation of cordless screwdrivers and cordless hammer drills can, in rare cases, cause the drill chuck to open during a sudden, hard spindle stop. What admittedly happens only infrequently in practice is made virtually impossible by RÖHM’s patented SAS (Shock Absorbing System).
As a specialist in gripping and clamping technology, RÖHM has enhanced the integrated radial locking mechanism of its drill chucks with a shock absorber that additionally dampens the impact occurring during a spindle stop.
The technology – briefly explained: Cordless power tools now dominate even professional applications. One challenge is that, due to their design, they can come to an especially abrupt spindle stop when switched off. The unbraked clamping sleeve then follows the principle of inertia and continues to rotate in the opening direction of the drill chuck. If this release torque is too high, the chuck may open and lose the tool.
For this reason, RÖHM drill chucks of the Extra series have featured an integrated radial locking system for more than 20 years, capable of withstanding torques from 1.5 Nm to 2.5 Nm, or up to 3.5 Nm in the Top Lock version.
With the new SAS (Shock Absorber System), RÖHM now provides additional damping for particularly hard impacts that can occur when some of the latest cordless power tools come to an abrupt stop. To achieve this, a specially developed damper is integrated circumferentially into the chuck’s operating sleeve. It counteracts high breakaway torques, ensuring that the radial locking system reliably prevents the chuck from opening.
The new SAS, in combination with the Top Lock radial locking system, is currently available in the RÖHM Extra 50 drill chuck – the world’s shortest professional drill chuck at just 51 mm in length – as well as in the Extra 80 drill chuck.