291-HK-HKR
BERG HSK Grippers HK and HKR
The BERG Spanntechnik HK and HKR series grippers have significant technical advantages, including integrated force intensification, easy-to-machine spindle contour, and a tribolic coating that does not need lubrication. The HKR gripper adds the unique capability of holding a tool with low force before the tool is clamped. This means that the spindle can pull away from the tool changer before tool clamping takes places (a key feature when fast tool change time is needed).
Application
Clamping sets of the type HKR are designed for clamping hollow shank tools according to DIN 69893.
Design Features
HKR clamping sets have six collets held by an annular spring which allows a rocking movement for inserting and removing the hollow shank tools. During clamping the taper of the centrally positioned draw-bolt increases the actuation force, thereby generating a much higher clamping force at the collets. The special tribolic coating guarantees the highest possible constant clamping force. The clamping set is maintenance free.
A locking bolt permits infinitely variable position and fixation of the clamping set in the Z axis. No special tools are required for assembly and disassembly.
The spindle has an easy to produce interior contour. The HKR gripper has a built-in snap-hold feature allowing a tool to be held securely in the spindle even in an unclamped position.
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