How to do machining of rectangular internal keyway on VMC ?

[maluv888]

Hi guys,

Please see attached photo. Please guide me " How to do machining of rectangular internal keyway on VMC ? " by using Fusion 360 strategies ?

[LibertyMachine]

Broach?

Otherwise, a right angle head: https://eltool.com/

[maluv888]

Hi Seth,

You have given an excellent solution in the form of :- right angle head: https://eltool.com/

But that right angle head is powered by high pressure coolant supply , which my HMC does not have.

So please think of an alternative.

[LibertyMachine]

I don't have to think of anything, the job isn't in my shop 😄

Rotary Broaching, or good 'ol arbor press and keyway broaching

[Anonymous]

I have had good luck with cncbroachtools.com. We use their tools for 3/16 and 1/4 through keyways in 316 s/s impeller hubs.

[randyT9V9C · Accepted solution]

@LibertyMachine +1.

You can also do blind broaching provided you relieve the cut.

If this is one off job you could simply use HSS in a boring bar. Just like you'd broach on the lathe. 😉

If you have a lot of these, look into a Keyseat miller.

http://www.keyseaters.com/index.html

https://www.youtube.com/watch?v=XrFEN9veUfU