10368550Kutlu Deutschland GmbHPutting, fast replaceable SDS Plus drills for pneumatic rotary hammers have a 10 mm diameter of a shank and have 4 oval-shaped grooves, from which on one side there are 2 closed and 2 open grooves. In order to calculate from the total length of a drill its pararell length, one has to substract 60 mm from the total length. This is the length at which the drill is putted on the hammer.
The naming of brands for the aftermarket business is based on § 23 MarkenG (Trademark law) and not call the manufacturer of the goods offered.
Drills which have a hexagonal grip are putted on a normal clamping head or on a collet drill chuck. Hexagonal form allows to keep the drill in the chuck in proper alignment, so there is a better energy transfer.