Leon Fisk wrote:
On Mon, 23 Jan 2017 13:12:23 -0500
Bob Engelhardt wrote:

On 1/23/2017 8:29 AM, rangerssuck wrote:
Just a few suggestions:

1) Make a friend at a precision machine shop that has an optical
comparator. You'l be able to look at the gear in excruciating
detail and make all the measurements you need.

1a) Take a good, sharp close-up photo, making sure that the camera
is square with the gear. Blow it up to several times actual size
and take your measurements off the print. You can help this along
by including a ruler in the photo for scale (or scribing some lines
on the gear).

2) send the busted gear to Boston Gear and ask them to match it.
Make sure to talk to someone first and to provide a return shipping
label.


Thanks - I'll keep those in mind.

I hadn't seen it mentioned yet, but the book "Workshop Practice Series
No 17 - Gears and Gear Cutting by Ivan Law" may help. If your lucky
you might find it at the library. Otherwise its around $23:

https://www.amazon.com/Gears-Gear-Cu...dp/0852429118/

It used to get mentioned here when your kind of question came up...

I think I got my copy on Amazon for 17 bucks . Definitely a must-have for
a beginner gear-cutter . BTW Bob , what dp is your gear ? I have a full set
of 16 dp and a few 20 dp's . Ping me offline , my reply-to is good .
--
Snag