Free 186 More Best Homemade Tools eBook:  
Get 2,000+ tool plans, full site access, and more.

User Tag List

Page 1 of 3 1 2 3 LastLast
Results 1 to 10 of 23

Thread: Another shear tool

  1. #1
    Supporting Member olderdan's Avatar
    Join Date
    Jun 2016
    Posts
    781
    Thanks
    1,456
    Thanked 1,531 Times in 463 Posts

    olderdan's Tools

    Another shear tool

    Inspired by Tony Foales carbide shear tool version I had to make mine in a different way without the use of a milling machine. I had a ½ square braised carbide tool which I turned the shank down to a 3/8 dia to fit a square tool block from my cutter grinder which fits my tool holder, this does have the facility to vary the shear angle to suit different materials. Apart from the excellent finishes it produces it is very useful for work hardening steels which do not allow a small final cut to size, this tool will shave off a tiny finishing cut. These tools do have a limitation when working to a shoulder but raising the tool close to the bottom edge will do for most items.

    Another shear tool-1.jpg
    Another shear tool-2.jpg
    Another shear tool-3.jpg
    Semi hard cast steel

    186 More Best Homemade Tools eBook

  2. The Following 15 Users Say Thank You to olderdan For This Useful Post:

    Crusty (Feb 2, 2021), Dimsa (Jan 28, 2021), DIYSwede (Jan 28, 2021), flyfr8rs (Jan 28, 2021), Home-PC (Jun 19, 2022), jackhoying (Jan 28, 2021), jimfols (Jan 28, 2021), johncg (Jan 29, 2021), Jon (Jan 28, 2021), mwmkravchenko (Jan 30, 2021), Okapi (Feb 1, 2021), Ralphxyz (Jan 28, 2021), Sleykin (Jan 28, 2021), thevillageinn (Jan 29, 2021), tonyfoale (Jan 29, 2021)

  3. #2
    Supporting Member DIYSwede's Avatar
    Join Date
    May 2019
    Location
    Stockholm, Sweden...
    Posts
    634
    Thanks
    415
    Thanked 799 Times in 319 Posts

    DIYSwede's Tools
    Thanks Olderdan for yet another (seemingly) simple, versatile tip!
    "-Dang, why didn't I think of THAT!"

    Changing the shear angle this easily will probably improve finish even more,
    also being able to cut up to a right shoulder, should that need arise...
    Sometimes feeding from the chuck can improve the finish even further.

    I'm already off to the tool scrap bin, where a few oversize shank brazed carbide tools sits.
    I'll just have to turn them down to fit!
    Up until now I've been using a 4x4 mm HSS sitting in a DIY-ed lo profile V-block in the tool holder for a shear tool...

    Cheers
    Johan

    2000 Tool Plans
    Last edited by DIYSwede; Jan 28, 2021 at 09:25 AM.

  4. The Following 2 Users Say Thank You to DIYSwede For This Useful Post:

    mwmkravchenko (Aug 23, 2022), olderdan (Jan 29, 2021)

  5. #3
    Supporting Member Ralphxyz's Avatar
    Join Date
    Dec 2016
    Posts
    1,564
    Thanks
    2,378
    Thanked 279 Times in 228 Posts

    Ralphxyz's Tools
    Olderdan, do you have a link for the ½ square braised carbide tool ?

    Ralph

  6. #4
    Supporting Member metric_taper's Avatar
    Join Date
    Mar 2017
    Location
    Marion, Iowa
    Posts
    584
    Thanks
    226
    Thanked 256 Times in 153 Posts

    metric_taper's Tools
    Ralph, that looks like a C-8 type brazed carbide bit.

    https://www.ebay.com/sch/i.html?_fro...l+C-8&_sacat=0

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

    mwmkravchenko (Aug 23, 2022), olderdan (Jan 29, 2021)

  8. #5
    Supporting Member flyfr8rs's Avatar
    Join Date
    Mar 2016
    Location
    Alaska
    Posts
    22
    Thanks
    96
    Thanked 18 Times in 6 Posts
    Olderdan, thanks for the great post. I've found shear tools great for certain jobs, but to date mine are all HSS. I'm not familiar with the type of clamp that you chucked up to hold the carbide bit in the lathe...it looks like it would be very handy for certain tasks (obviously like this one). Could you perhaps tell me what that is called, and even better where I can find them. THANKS!

    John

  9. The Following User Says Thank You to flyfr8rs For This Useful Post:

    olderdan (Jan 29, 2021)

  10. #6
    Supporting Member tonyfoale's Avatar
    Join Date
    Nov 2016
    Location
    Spain
    Posts
    1,549
    Thanks
    679
    Thanked 2,627 Times in 705 Posts

    tonyfoale's Tools
    Alan,

    I am glad to know that my post inspired at least one person. I love your ability to change the angle, but do you do that?

  11. The Following User Says Thank You to tonyfoale For This Useful Post:

    olderdan (Jan 29, 2021)

  12. #7
    Supporting Member olderdan's Avatar
    Join Date
    Jun 2016
    Posts
    781
    Thanks
    1,456
    Thanked 1,531 Times in 463 Posts

    olderdan's Tools
    John, it is a clamp type driving dog for between centres work, I had centred the blank in the 4 jaw both ends. It was given to me by a retiring turner it has no makers mark and have not seen another like it, it has left and right hand threads so stays central and balanced.

  13. The Following User Says Thank You to olderdan For This Useful Post:

    flyfr8rs (Jan 29, 2021)

  14. #8
    Supporting Member olderdan's Avatar
    Join Date
    Jun 2016
    Posts
    781
    Thanks
    1,456
    Thanked 1,531 Times in 463 Posts

    olderdan's Tools
    Tony, I have not used it much as I have only just made it, The ability to change angle is just a byproduct of the way I had to make it.

  15. #9
    Supporting Member olderdan's Avatar
    Join Date
    Jun 2016
    Posts
    781
    Thanks
    1,456
    Thanked 1,531 Times in 463 Posts

    olderdan's Tools
    Quote Originally Posted by metric_taper View Post
    Ralph, that looks like a C-8 type brazed carbide bit.

    https://www.ebay.com/sch/i.html?_fro...l+C-8&_sacat=0
    Thats the one, I should have mentioned in my post that using a braised tool bit does require the ability to be able to sharpen it.

  16. The Following User Says Thank You to olderdan For This Useful Post:

    mwmkravchenko (Aug 23, 2022)

  17. #10
    Supporting Member DIYSwede's Avatar
    Join Date
    May 2019
    Location
    Stockholm, Sweden...
    Posts
    634
    Thanks
    415
    Thanked 799 Times in 319 Posts

    DIYSwede's Tools
    Just sharing a few experiences from my uses:

    Shear tools can just take one or two thou - use something else for roughing.
    Let the piece cool after roughing if you aim for really tight tolerances.
    (Use the compound at 3-ish degrees for controlled DOC into the tenths range)
    Cutting edge has to be really sharp and can dull pretty fast, though geometry isn't critical.
    (Some people reported meagre results when using inserts, where the cutting edge hasn't been ground & honed)
    Really fine feed, cutting oil and only a few hundred rpms for super finish.
    As the tool doesn't exert any high tool pressure, it cuts cool and deflection is minimal even for long stickouts.
    (I use it for instance for checking if my lathe cuts tapers).
    Excellent for finishing difficult materials: "Mystery metals", rebar, cold rolled, copper and even lead.

    YMMV

    Johan
    Last edited by DIYSwede; Jan 29, 2021 at 11:09 AM.

  18. The Following 5 Users Say Thank You to DIYSwede For This Useful Post:

    metric_taper (Jan 31, 2021), mwmkravchenko (Aug 23, 2022), Okapi (Feb 1, 2021), olderdan (Jan 29, 2021), Sleykin (Jun 18, 2022)

Thread Information

Users Browsing this Thread

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

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
  •