Collar for any tap. Drawing, description

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Collar for any tap. home workshop

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Even for a small set of taps - tools for manual threading in holes - it is necessary to have several knobs (or one common one - with a number of square holes). As practice has shown, a universal one is more convenient - a sliding collar.

Here is a rather simple design developed at school No. 27 in Gorky. The collar consists of only two parts. The case is machined from a steel bar Ø 15 mm and 105 mm long. On the one hand, it is machined at a length of 65 mm up to Ø 8 mm, on the other hand, a threaded hole M6 is made. The central part of the body is milled or filed along two parallel planes to a thickness of 9 mm. A hole Ø 6 mm is drilled in the middle of this platform perpendicular to the axis. With a file, it is given the shape of a pentagon (see Fig.) with an angle of 90 ° at the top lying on the longitudinal axis. Then a handle is made from a piece of silver with a diameter of 8 mm and a length of 89 mm. Its shank is ground to a length of 24 mm to Ø 6 mm - under the M6 thread, and knurling is done in the middle part on a 20 mm girdle.

Collapsible crank (click to enlarge): 1 - body, 2 - handle

By turning the handle in the body, any tap can be securely fixed in the central hole of the wrench: from M2 to M8.

Author: I.Shuin

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