MadModder

The Shop => Tools => Topic started by: Trebor on August 02, 2013, 01:19:25 PM

Title: Rotary Broacher
Post by: Trebor on August 02, 2013, 01:19:25 PM

Can anyone tell me if its possible to buy a rotary broacher in the UK ?

Title: Re: Rotary Broacher
Post by: NeoTech on August 02, 2013, 01:28:14 PM

Make one? Its a good little project. :)

Title: Re: Rotary Broacher
Post by: Trebor on August 02, 2013, 01:45:14 PM

If only I knew how !! Just found this but It looks expensive

     

Title: Re: Rotary Broacher
Post by: tekfab on August 02, 2013, 02:06:07 PM

Did our very own Rob Wilson not make one ? i think it would be somewhere in the Project logs if you look.

Mike

Title: Re: Rotary Broacher
Post by: NeoTech on August 02, 2013, 02:09:25 PM

(http://cdn.homemodelenginemachinist.com/attachments/f12/47508d1342624431-rotary-broach-tool-design-wobbly.jpg)

http://www.homemodelenginemachinist.com/f12/rotary-broach-tool-design-14076/ (http://www.homemodelenginemachinist.com/f12/rotary-broach-tool-design-14076/)

Theres a cad file i n the HME topic regarding wobble / rotary broaches..

Basicly a two part tool back end is 90 degree flat with the chuck, the front part is set 1 degree off, the tool rotates on a throwout bearing and radial bearing.

Title: Re: Rotary Broacher
Post by: NeoTech on August 02, 2013, 02:11:09 PM

http://www.homemadetools.net/rotary-broaching-tool (http://www.homemadetools.net/rotary-broaching-tool)

Here you have another design on the same issue. =)

Title: Re: Rotary Broacher
Post by: John Swift on August 02, 2013, 02:22:50 PM

Hi Trebor

yes , you can buy them in the UK
first web search result ---  http://www.repco-tech.co.uk/broaching-attachments/

how many thousands of parts are you making ?

Title: Re: Rotary Broacher
Post by: Trebor on August 02, 2013, 02:43:29 PM

Theres no indication on prices !! I would love having a go at making one but at the moment ai only have a lathe and a few tools  :bang:

Title: Re: Rotary Broacher
Post by: NeoTech on August 02, 2013, 02:45:10 PM

All you need is actually the lathe.. Before i got my mill i did all kinds of exploratory operations on my lathe, with setting up the work on faceplate holding endmills in the ordinary tool holder, drill chucks and whatever..   To be honest.. The lathe is a mill lying down basicly..

Title: Re: Rotary Broacher
Post by: John Swift on August 02, 2013, 03:39:10 PM

Hi Trebor

I suspect a second hand one will be a few hundred pounds and a new one if you have to ask whats the price you can't afford it for hobby use

years ago I watched an EMI-MEC sprint ,  broach 3/8" square holes in the parts it was making
the job run for days
 ( automated capstan lathe  with a 3 HP spindle motor if I remember correctly)

for a diy broach look here -
http://madmodder.net/index.php/topic,6165.msg70542.html#msg70542

    John