Free 173 Best Homemade Tools eBook:  
Page 2 of 2 FirstFirst 1 2
Results 11 to 18 of 18

Thread: Shop Made Rotary Broach with plans

  1. #11
    Content Editor DIYer's Avatar
    Join Date
    Aug 2013
    Posts
    3,091
    Thanks
    433
    Thanked 931 Times in 857 Posts


    Thanks jjr2001! We've added your Rotary Broach to our Machining category,
    as well as to your builder page: jjr2001's Homemade Tools. Your receipt:




  2. The Following User Says Thank You to DIYer For This Useful Post:

    jjr2001 (02-08-2019)

  3. #12
    old_toolmaker's Avatar
    Join Date
    Dec 2017
    Location
    Minnesota
    Posts
    317
    Thanks
    202
    Thanked 297 Times in 105 Posts

    old_toolmaker's Tools
    jjr2001,

    Nice job, jjr2001!!!
    That is a great tool to own and I just have to make one for my own.
    Dick


    Links to some of my plans:

    http://www.homemadetools.net/forum/f...6068#post65876 OFF-SET TAILSTOCK CENTER PLANS
    http://www.homemadetools.net/forum/s...995#post112113 SMALL TURRET TOOL POST PLANS
    http://www.homemadetools.net/forum/l...994#post112111 LARGE TURRET TOOL POST PLANS
    http://www.homemadetools.net/forum/m...383#post110340 MINI-LATHE CARRIAGE LOCK PLANS
    http://www.homemadetools.net/forum/s...191#post106483 SMALL QC TOOL POST PLANS
    http://www.homemadetools.net/forum/q...849#post119345 QUICK CHANGE LATHE TURRET
    http://www.homemadetools.net/forum/m...949#post119893 MINI LATHE COMPOUND PIVOT MODIFICATION

  4. The Following User Says Thank You to old_toolmaker For This Useful Post:

    jjr2001 (02-08-2019)

  5. #13
    jjr2001's Avatar
    Join Date
    Jun 2016
    Posts
    815
    Thanks
    1,090
    Thanked 1,540 Times in 493 Posts

    jjr2001's Tools
    Thanks Dick, I think you will like the results.
    Cheers, JR

  6. #14
    Toolmaker51's Avatar
    Join Date
    Feb 2016
    Location
    Midwest USA
    Posts
    1,977
    Thanks
    3,526
    Thanked 1,617 Times in 983 Posts

    Toolmaker51's Tools
    Quote Originally Posted by jjr2001 View Post
    Hi guys, thanks for all the comments. In response to Don's question about using the tool for a Hex socket. Yes it will work for that.
    I have not made one yet but I have seen broaches specifically for that purpose. Just need to grind the tool bit with 6 sides instead of 4.
    I am still experimenting with mine and will try a hex socket as that is one of my needs also.


    Cheers, JR
    IIRC [as not up to googling this frigid afternoon] commercial rotary broaches have one less face than intended recess; ie square uses 3 faces, hex are 5. Size remains as jjr illustrates, the missing side is chip clearance and probably widens speed range. I suspect higher RPM created lower .001's per revolution [feed rate]. Rotary broaches were used most in turret lathes, instead of relegating parts to another machine for second operations.
    Sincerely,
    Toolmaker51
    ...we'll learn more by wandering than searching...

  7. The Following 2 Users Say Thank You to Toolmaker51 For This Useful Post:

    jjr2001 (02-10-2019), PJs (02-10-2019)

  8. #15
    jjr2001's Avatar
    Join Date
    Jun 2016
    Posts
    815
    Thanks
    1,090
    Thanked 1,540 Times in 493 Posts

    jjr2001's Tools
    Thanks TM, I am not sure how the 3 sided square broach would work.
    Does it require a second pass after rotating it 90 deg to cut the 4th side?

    Cheers, JR

  9. #16
    Toolmaker51's Avatar
    Join Date
    Feb 2016
    Location
    Midwest USA
    Posts
    1,977
    Thanks
    3,526
    Thanked 1,617 Times in 983 Posts

    Toolmaker51's Tools
    Quote Originally Posted by jjr2001 View Post
    Thanks TM, I am not sure how the 3 sided square broach would work.
    Does it require a second pass after rotating it 90 deg to cut the 4th side?

    Cheers, JR
    You've got me...Slater's the go-to for rotary broaching. They spec .0005 or less tolerance capability on tooling. I've not needed to production broach, the few polygons were arduously milled for finishing in a shaper, sinker or wire EDM Closest I've been is milling sinker graphite electrodes or setup and run shaper
    A mentor from Long Beach, CA, absolute wizard of horizontal turret lathes, had them. I expect the tool was indexed from a rougher to finisher or changed front retainer? These were very large, he probably made them in the 30's or 40's. As an employee, 'his' largest turrets were big bore oil country machines.
    Sincerely,
    Toolmaker51
    ...we'll learn more by wandering than searching...

  10. The Following 2 Users Say Thank You to Toolmaker51 For This Useful Post:

    jjr2001 (02-10-2019), PJs (02-10-2019)

  11. #17
    jjr2001's Avatar
    Join Date
    Jun 2016
    Posts
    815
    Thanks
    1,090
    Thanked 1,540 Times in 493 Posts

    jjr2001's Tools
    Thanks for the info TM.
    Cheers, JR

  12. The Following 2 Users Say Thank You to jjr2001 For This Useful Post:

    PJs (02-11-2019), Toolmaker51 (02-10-2019)

  13. #18
    jjr2001's Avatar
    Join Date
    Jun 2016
    Posts
    815
    Thanks
    1,090
    Thanked 1,540 Times in 493 Posts

    jjr2001's Tools
    Hi PJs, Thanks for your comments, much appreciated. I am using a moly chassis grease, just standard stuff for old school auto ball joints etc.
    I do use it on my "bigger lathe" which is only a "mini lathe" or 7x16 like the one LMS sells. The lathe seems to handle it ok with the new 1hp motor.

    I will try to get a video of it on a test piece.

    Cheers, JR


    Post your reply!
    Join 33,912 of us and get our 173 Must Read Homemade Tools eBook free.



    173 Must Read Homemade Tools
    Back to the shop.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •