On Wed, 9 Jul 2008 21:26:47 -0500, "Terry Coombs"
wrote:
snip
I expect to cut a few gears (some for the lathe , couple are missing
teeth)
snp
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To avoid rediscovering fire and reinventing the wheel, buy the
book "Gears and Gear Cutting" by Ivan Law. Specifically written
for the home/hobby machinist and covers making your own cutters,
single tooth and b&s style.
several sources in the us but one example is
http://www.amazon.com/Gears-Gear-Cut...78963&sr= 1-1


Also on generating a 127 tooth gear. For best accuracy from the
typical rotary table / dividing head, the best best seems to be
to use the table to make as big a plate as will fit your head
with 127 holes using the degree markings and vernier and use this
to generate the gear. The 127 hole plate is not generally
available and the other methods are (a) a pain, and (b) not
generally possible with the less expensive dividing heads
available for home/hobby shop use.