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Rotary Broaching

Posted: Sat Feb 22, 2025 7:28 am
by suntravel
Easy way to make internal profiles on a mill or lathe.

Animation how it works:



And some pics from my lathe hex 5mm in AW7075 and stainless steel.

Uwe

Re: Rotary Broaching

Posted: Wed Apr 23, 2025 6:58 am
by richardb15
I have a rotary broach tool I use for EN36 gears, putting 1/2" square in the centre. it works well but I find I have to use huge tailstock force to drive it in hard enough to create the peeling effect. Maybe the hex takes out less material, its a tool I think I should use more but the cost of the tools is quite high from the place in the UK I got the head from, so to be honest I still fall back to conventional broaching quite often for through holes.

Re: Rotary Broaching

Posted: Wed Apr 23, 2025 8:13 am
by suntravel
It is working with TORX also.

You can also use the broaching tool on the mill.

For square hole I use broaching with C-Axis and small steps, repeat four times 90 deg.

Uwe

Re: Rotary Broaching

Posted: Thu Apr 24, 2025 4:20 am
by richardb15
Where do you buy your tooling from for the rotary broach? My head unit is a Tangi-flow:
https://www.tangi-flow.com/

So I've always bough from them, but as mentioned never been overwhelmed with performance from it despite the high cost :cry:

Re: Rotary Broaching

Posted: Thu Apr 24, 2025 7:04 am
by tblough
My goto is Polygon Solutions: https://www.polygonsolutions.com/

Re: Rotary Broaching

Posted: Thu Apr 24, 2025 10:48 am
by suntravel
I get them, if cheap is ok from Ali, if I want quality, or custom sizes from Wittmann:

https://www.wittmann-werkzeuge.com/en

Uwe

Re: Rotary Broaching

Posted: Fri Apr 25, 2025 3:50 am
by richardb15
Thanks all, maybe I should revisit that toolholder with some different tip tooling, good excuse to make use of it again 8-)