Keyway Broaching

[Ben Piecuch]

Sounds like you have the tools, you're just looking for some advice.

I always tell my students to take the first few notches slowly, and always back off the arbor press after 1 or 2 notches. If the broach is slightly offline, it will snap fairly easily. By backing off the arbor, it allows the broach to realign itself vertically, and you can press again. Be sure that your arbor press is aligned properly.

Lubrication is your friend.

And, we've found that we need to do a third pass with the broach, but from the back side of the part. For some reason the 2nd pass hasn't been cutting deep enough for us, so we've had to flip the part and finish the keyway from the backside. Odd, but it's a new broach set for us this year...

Best of luck,

Bengineer

[Gdeaver]

I assume your cuting the keyways for the Andy mark trans. You may have to do a little filing to get the key in the output shaft keyway.