How To Make A Fly Cutter Holder, A Fly Cutter, And A Depth-of-Cut Attachment, To Make Small Gears by Robert Porter

This 8 1/2" x 11", 12 page booklet will show you how to make a fly cutter holder; how to make and use a constant profile fly cutter to produce gear teeth with perfect profile symmetry. You are also shown how to make a simple depth-of-cut attachment for your milling attachment to make it easier to precisely control the depth of cut of the fly cutter. How to make sure the fly cutter is perfectly square to the holder is also illustrated.

Useful information about setting your lathe compound to produce the 40 degree included angle on the holder, as well as cutting the .275"/40 thread, to fit the milling attachment for your WW style watchmakers' lathe. The making of a 96 tooth gear with the holder and fly cutter is illustrated as well. The holder can be scaled up to fit other milling attachments. Eighteen pictures, with supporting text and a line drawing will show you what you need to know to make small gears.