Author Topic: Rotary Broaching  (Read 24101 times)

Offline Bernd

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Rotary Broaching
« on: October 24, 2011, 12:15:17 PM »
Got this off a news group I belong to. Intersting approach to broaching.

 http://www.slatertools.com/sales-support-service/videos/rotary-broach-and-tool-holder-demostration

Perhaps one of our talented members can build one and do a build log?  :poke:  :clap:

Bernd
Route of the Black Diamonds

Rob.Wilson

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Re: Rotary Broaching
« Reply #1 on: October 24, 2011, 12:31:37 PM »
Hi Bernd

had ago at making  one last year , after seeing that very video  :dremel:







still needs a bit of refinement  :proj:


Rob
« Last Edit: October 29, 2011, 12:58:08 PM by Rob.Wilson »

Offline dsquire

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Re: Rotary Broaching
« Reply #2 on: October 24, 2011, 12:51:54 PM »
Got this off a news group I belong to. Intersting approach to broaching.

 http://www.slatertools.com/sales-support-service/videos/rotary-broach-and-tool-holder-demostration

Perhaps one of our talented members can build one and do a build log?  :poke:  :clap:

Bernd

Bernd

I watched the video then came back to the post and was going to reply. Then I saw Robs reply. Man that guy is not only good but he is extremely fast. Bet you never figured on anyone doing it quite that quick.
 :D :D


Rob

That was quick or was it good timing.  :lol: It will be interesting to see when you are finished with the refinements.
 :) :)

Cheers  :beer:

Don

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Never let it rest,
'til your good is better,
and your better best

Rob.Wilson

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Re: Rotary Broaching
« Reply #3 on: October 24, 2011, 01:10:06 PM »
Hi Don  :lol: :lol: :lol:

Just good timing  :med: ,,,,,, made it last Christmas (i think ) ,,looked and interesting project  ,so  thought i would have an attempt at making one  :dremel:

works ok ,,,,,,, but i screwed up the bearing fit  :doh: so i need to re machine one part .


it still  work in progress

Rob
« Last Edit: October 24, 2011, 02:20:28 PM by Rob.Wilson »

Offline Bernd

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Re: Rotary Broaching
« Reply #4 on: October 25, 2011, 06:58:16 AM »
Jeeeeees Rob, I can't post anything new.  :(    :lol:  :lol:  :lol:  :lol:

Nice job. And like Don said, "your fast".

Bernd
Route of the Black Diamonds

Offline dsquire

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Re: Rotary Broaching
« Reply #5 on: October 25, 2011, 10:47:20 AM »
Bernd

Don't you just hate that when you see something that you think is new and great. So you rush out to tell the rest of the world only to find out that everyone else already knew about it. It has happened to me a few times too.  :lol: :lol:

Cheers  :beer:

Don

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Never let it rest,
'til your good is better,
and your better best

Rob.Wilson

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Re: Rotary Broaching
« Reply #6 on: October 25, 2011, 11:52:53 AM »
SORRY Bernd  :lol: :lol: :lol:

Its still needs some refinements ,,,,,, was planning on doing a build when it was all sorted ,,,,,, just  :proj: keeps getting in the way  :doh:


Rob  :dremel:

Offline Bernd

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Re: Rotary Broaching
« Reply #7 on: October 25, 2011, 05:21:41 PM »
Ok Rob your forgiven.  :thumbup:

 I know all about that  :proj:. I've got a couple of those going right now.

Bernd
Route of the Black Diamonds

Offline DaveH

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Re: Rotary Broaching
« Reply #8 on: October 26, 2011, 03:23:00 PM »
Rob,

That's a nice bit of machining you did. :clap: :clap: :clap:
 :beer:
DaveH
(Ex Leicester, Thurmaston, Ashby De La Zouch.)

Rob.Wilson

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Re: Rotary Broaching
« Reply #9 on: October 27, 2011, 11:42:44 AM »
Thanks Dave  :beer:

Rob  :D

Offline plunger

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Re: Rotary Broaching
« Reply #10 on: October 29, 2011, 03:58:01 AM »
Rob I would really like to make one of these. I hope I can ask a couple of questions without showing how ignorant I am? How do you get the tapered shape on the two main parts. Are you sawing off the shape as close as possible and then filing or grinding to get it to look good or is this done on a rotary table.Are you using two cheap bearings Would a thrust bearing also not maybe work better here as well.How much strain does it put in  a lathe to do a broach. Could this also be used on a milling machine to broach as well.
Have you made any broaches for yourself or are you buying broaches. This would be useful for making the odd tap handle that is obsolete in plumbing so it will only be used for brass.
 would like to try and make my own broaches but I think it may be beyond a home shop ability. Square I can probably handle but I tried to make a 8 mm spline broach with 20 splines and was not successful. Would you have a suggestion as to how a spline broach could be made. Regards Eugene

Rob.Wilson

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Re: Rotary Broaching
« Reply #11 on: October 29, 2011, 04:48:58 AM »
Hi there Eugene

No problem , ask away  :med:

How do you get the tapered shape on the two main parts. Are you sawing off the shape as close as possible and then filing or grinding to get it to look good or is this done on a rotary table.
I used a R/T for the job ,,,, it can be done by hand just the same  :dremel:




.Are you using two cheap bearings Would a thrust bearing also not maybe work better here as well.

Yes i just used a couple of cheap bearing that i had at hand ,,,,, thrusts would be a much better job , now i no it works i will make a better job of it  :dremel:


How much strain does it put in  a lathe to do a broach.

Not allot in brass and ally ,,,,,,,,,,,,,,,, the larger the broach the more grunt required  ,, i dig out info on that .



Could this also be used on a milling machine to broach as well.


Possibly never thought about it  :med:

Have you made any broaches for yourself or are you buying broaches.


Yes i made the broach myself ,,, i used Silver steel / drill rod  , water hardening   ,, worked fine on brass  ,, broke on stainless  :lol:

This would be useful for making the odd tap handle that is obsolete in plumbing so it will only be used for brass.
 

Just the job  :headbang:


 would like to try and make my own broaches but I think it may be beyond a home shop ability. Square I can probably handle but I tried to make a 8 mm spline broach with 20 splines and was not successful. Would you have a suggestion as to how a spline broach could be made.

Still thinking on that one  :scratch:

Rob


Rob.Wilson

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Re: Rotary Broaching
« Reply #12 on: October 29, 2011, 05:08:34 AM »
The doodle i used to make mine


Rob

Offline Joules

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Re: Rotary Broaching
« Reply #13 on: October 29, 2011, 07:44:02 AM »
Very Nice.  Can you elaborate on its function and use, how come you adjust the clamp bolts in 2 axis not one ?


                  Joules
Honour your mentors, and pay it forward.

Offline DaveH

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Re: Rotary Broaching
« Reply #14 on: October 29, 2011, 09:37:42 AM »
Rob,

Show off  :lol: :lol: :lol: :lol: :lol:

Nah - nicely done.

Any chance you can fix your avatar before it induces an epilepsy fit. :D :D :D
 :beer:
DaveH
(Ex Leicester, Thurmaston, Ashby De La Zouch.)

Rob.Wilson

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Re: Rotary Broaching
« Reply #15 on: October 29, 2011, 12:53:31 PM »
Hi Joules

Very Nice.  Can you elaborate on its function and use,

                  Joules

Did you not watch Bends video  :poke:  ,,,,,,,,,, its for poking odd shaped holes in things  :lol: :lol: :lol:

how come you adjust the clamp bolts in 2 axis not one ?

Ease of manufacture ,,,, other wise you would have to devise some other way of keeping perfect alignment on one axis

Cheers Dave  :beer:

Any chance you can fix your avatar before it induces an epilepsy fit. :D :D :D
 :beer:
DaveH



New coil pack on order  :lol: :lol: :lol:

Rob


Edit  ,,,,,,, fixed now Dave  :med:

Offline Bluechip

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Re: Rotary Broaching
« Reply #16 on: October 29, 2011, 01:39:15 PM »
Hi Rob

Do us all a favour...  :thumbup:

You wouldn't like to consign that lurid hyperactive custard thing to the crap bin would you ??

Find something with a bit of culture eh ???

I presume it is custard???

Aaarghhh .... not pureed canary ??? Oh Nooooooo   ............. blaaaargh

BC

Good job we can turn off avatars   :med:  :med:
I have a few modest talents. Knowing what I'm doing isn't one of them.

Offline dsquire

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Re: Rotary Broaching
« Reply #17 on: October 29, 2011, 01:59:10 PM »

An old saying comes to mind. Be careful what you ask for as you might not get what you expected.  :lol: :lol: :lol:

Cheers  :beer:

Don

Good, better, best.
Never let it rest,
'til your good is better,
and your better best

Offline DaveH

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Re: Rotary Broaching
« Reply #18 on: October 29, 2011, 02:15:03 PM »
Thanks Rob, :)

Just trying to think who your new avatar reminds me of? :lol:
 :beer:
DaveH

PS I don't suffer with epilepsy - I just said that to make you feel sorry for me. :D :D :D
« Last Edit: October 29, 2011, 03:29:05 PM by DaveH »
(Ex Leicester, Thurmaston, Ashby De La Zouch.)

Rob.Wilson

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Re: Rotary Broaching
« Reply #19 on: October 30, 2011, 06:18:16 AM »
 :lol: :lol: :lol: :lol: so you not impressed with my new avatar Dave BC   :(

I thought it was just the job  :lol: :lol:


Rob 

Offline John Stevenson

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Re: Rotary Broaching
« Reply #20 on: October 30, 2011, 06:42:50 AM »
Personally I think it's a good likeness of Rob.

John S.
John Stevenson

Offline Bluechip

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Re: Rotary Broaching
« Reply #21 on: October 30, 2011, 09:56:09 AM »
Personally I think it's a good likeness of Rob.

John S.

Since you have pointed that out, I have to agree.

Yet another objectional feature  ... :lol:  :lol:  :lol:   :lol:

BC
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Offline AussieJimG

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Re: Rotary Broaching
« Reply #22 on: January 12, 2012, 11:56:21 PM »
It is amazing how synchronicity creeps in. The latest Model Engineering Workshop - No 185 has an article on construction of a rotary broach and the tools to use in it. Michael Cox has included all the drawings. If you are interested in rotary broaching, it might be worth a look. :wave:

Jim

Offline andyf

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Re: Rotary Broaching
« Reply #23 on: January 13, 2012, 03:11:41 AM »
It is amazing how synchronicity creeps in. The latest Model Engineering Workshop - No 185 has an article on construction of a rotary broach and the tools to use in it. Michael Cox has included all the drawings. If you are interested in rotary broaching, it might be worth a look. :wave:

Jim, it's all on his website, too: http://mikesworkshop.weebly.com/rotary-broaching.html

Andy
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I've cut the end off it twice, but it's still too short

Offline AussieJimG

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Re: Rotary Broaching
« Reply #24 on: January 13, 2012, 05:43:49 AM »
Thanks Andy, that site has some really great stuff on it. Mike's mods to his 6x4 bandsaw in particular fixed a whole bunch of things that I should have fixed instead of moaning about them. :doh:
And now Mike has paved the way.

Thanks for pointing me to the site.

Jim

Offline DaveH

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Re: Rotary Broaching
« Reply #25 on: August 10, 2013, 07:01:02 AM »
Hi Rob,
I know this is an old topic (just like me  :lol: ) How is the rotary broach you made - now in retrospect would you change any thing?
I'm thinking of making one. Maximum 6mm squ/hex.
 :beer:
DaveH
(Ex Leicester, Thurmaston, Ashby De La Zouch.)

Rob.Wilson

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Re: Rotary Broaching
« Reply #26 on: August 29, 2013, 03:25:58 PM »
Hi Dave


A bit late with the reply  :Doh: , truth is I have only used it a few times so I cant really pass judgement . I would probably make it a bit smaller .



Rob 

Offline DaveH

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Re: Rotary Broaching
« Reply #27 on: August 31, 2013, 04:41:08 PM »
Thanks Rob  :thumbup:
 :beer:
DaveH
(Ex Leicester, Thurmaston, Ashby De La Zouch.)