EH 23310.
After aligning, the clamp positioning ring is fitted on the spindle with the effect, that repeated clamping is always exactly on the same point. The positioning ring is adjustable 360° on the down-thrust clamp. After mounting, the clamping claw can swing 110° to the left or right (only for the swiveling versions).
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Before mounting the positioning ring, pull-off the clamping claw of down-thrust clamp.