Hole saw and mandrel assembly

B - Operations – Transporting – 27 – B

Patent

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Details

B27B 33/18 (2006.01) B23B 51/04 (2006.01)

Patent

CA 2041435

A one piece hole saw assembly with mandrel permanently affixed to the hole saw cup. The mandrel contains a hollow shaft, a locking flange and reinforcing flange which are integrally formed as by machining. The locking flange of the mandrel mates with a locking hole or slot in the top surface of the hole saw cup. The reinforcing flange on the mandrel is welded during manufacture to the top surface of the hole saw cup. A pilot drill bit is inserted into the shaft core and welded to the shaft. The resulting product is a one piece hole saw assembly intended for use by simple insertion of the mandrel or shaft end of the pilot drill into the chuck of a conventional electric drill.

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