Cutting Tetrix gears

[techhelpbb]

Originally Posted by Forhire

It sounds like an interesting read.

I've cut a few gears using a hand ground fly cutter also.

Article by Jim Hansen, June/July 2009, Volume 22, Number 3, page 4 also made cover. "Machinist Workshop" magazine uses custom manual indexer plate on Sherline headstock with stock Sherline 5400 turning slitting saw.

Marsh Collins did a long article on building a metal shaper which for me is on page 110 of "Projects 8, The Home Shop Machinist" hardcover. A bigger shaper than the hobby size one from the link provided earlier to Martin Model. It is attractive to me to use just a shaper to make gears because it is very predictable in operation and I make so few. Hobber costs add up.

There are plenty of tips in "Tabletop Machining":
https://www.amazon.com/Tabletop-Mach.../dp/0966543300
Page 226 for example they cut a helical gear.

The Sherline 8700 stepper driver rotary table manual has a section on gear cutting.

Now that I scrounged the stuff in grabbing radius .

Here is a HSS bar in a fly cutter body using a 4th axis on a desktop mill to make a replacment gear:
http://www.homemodelenginemachinist....ead.php?t=7246
Keep in mind if you do that you better be darn sure the fly cutter body is mounted firmly. The link above is a manual indexer but that technique works on a CNC 4th axis as well.

Will update when I get to my library later...