On Mar 12, 9:07*pm, "Don Young" wrote:

You may consider finding someone with a shaper or slotter, which could make
quick work of it.

Don Young

Or lacking one you can use a lathe, with the work in the stationary
chuck and the shaping tool on the carriage. If the lathe has a
threaded spindle you can make an index wheel that fits behind the
chuck. This is MUCH slower than a real dedicated machine and you still
need a very sharp form tool.