Importance

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Abstract

A depth stop for a drilling tool comprises a rod 12 mounted on the tool body for sliding movement in directions parallel to the drilling movement, and a locking lever 15 pivotally mounted about a pivot boss 16 which projects at a substantially right angle to but is offset from the rod. The rod, extends through an aperture in the upper part 18 of the lever which aperture provides a radical clearance for the rod, and a spring 19 biases the lever so as to bring a peripheral edge or opposite peripheral edges of an aperture through the lever into frictional engagement with the rod and the biasing direction is the same as the direction in which the rod tends to move when it comes into abutment with a workpiece. The rod can be released by manually swivelling the lever against the spring force. The rod 12 may have a knurled surface 14 so as to provide substantially a mechanical lock with the co-operating peripheral edge of the lever aperture.

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First Claim