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Rember the threading tool gringing fixture

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  • Rember the threading tool gringing fixture

    Anyone rebember the threading tool grinding fixture that was posted awhile back? Seems like it was posted by John Stevenson, and was used on a surface grinder. I tried to search the archives, but the old boy has posted so much, I can't seem to be able to sort it out.

    Thanks in advance,
    TC

  • #2
    Not me.

    Could have been Kap Pullen on page 2 of this thread.

    http://bbs.homeshopmachinist.net/sho...+tool+grinding

    Or Spin Doctor in this thread.

    http://bbs.homeshopmachinist.net/sho...+tool+grinding

    Or Spin again in this thread.

    http://bbs.homeshopmachinist.net/sho...+tool+grinding

    .
    .

    Sir John , Earl of Bligeport & Sudspumpwater. MBE [ Motor Bike Engineer ] Nottingham England.



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    • #3
      Thanks, John

      I owe ya a cold one. Er, as some of you guys on the other side of the pond prefer, a warm one.

      Regards,
      TC

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      • #4
        I finally gave up and posted my first photo on this site as seen below. I have not tried to do it here but what the heck, a photo is the best way to describe something.
        Last edited by Carld; 01-14-2007, 12:51 PM.
        It's only ink and paper

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        • #5
          I've been grinding threading tools free-hand all my working life except when I've needed matched tools for repetative tooling reasons.

          Why suddenly do we need a grinding fixture again?

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          • #6
            Forrest,

            Maybe Tim hasn't been hand grinding threading tools all his life?

            I have been grinding them for 35 years too, but the eyes are going bad.

            I believe it will help the hobbiest to make some of those chores just a bit easier.

            Kap

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            • #7
              Here is one I made a few months ago.
              Hope this works, first time to post a picture here.

              If i'm lucky.
              ...lew...
              nope not lucky. more research necessary.:-)
              I guess it did work just took a little longer.

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              • #8


                Here is my grinding fixture. It starts as a 2 1/2" cube of cold roll. The base is machined to a 5 deg angle. The slots are machined at 30deg on each side and set screws are added to hold the tool. You can make it any size you need for as big a tool you will grind but I found 1/2" tools is big unough.

                I can grind by hand but with the fixture it is perfect and very sharp. Gives me a reason to use the surface grinder too.
                Last edited by Carld; 01-14-2007, 12:49 PM.
                It's only ink and paper

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                • #9
                  Thanks to all who replied, and Forrest:

                  Well, I have one that works. One of the things I've been going to do for awhile.

                  Forrest: you are absolutely right, hand ground threading tools are easy for those who have worked in the trade, in times past. No doubt, you served an apprenticeship under a tough taskmaster who taught you the finer points of grinding all manner of cutting tools. I respect your skills. I admire them. Those of us that are home shop types sometimes struggle with the details of doing nice work. Trying to take my work to the next higher level, I have noticed that georgeous threads, shiny and fitting nicely seem to elude me. I want to see if the cutting tool is where the problem lies.

                  Lacking a local mentor who has skills such as yours leads me to get by the best I can. This in no way should be construed as an apology. I'm pretty damn proud of how far I've progressed. I guess I'm trying to explain how it is for those of us that have never worked in the trade.

                  Best Regards
                  Tim

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                  • #10
                    Originally posted by Forrest Addy
                    I've been grinding threading tools free-hand all my working life except when I've needed matched tools for repetative tooling reasons.

                    Why suddenly do we need a grinding fixture again?
                    I can think of one reason why. I prefer to use a quick change type tool post or even just a square block type set square to the Z Axis of the lathe. That way I know the angles on the lead and trailing side of the tool bit are dead nuts. I've ground more tools off-hand than I care to think about and will grind a lot more before I'm done. But I was always taught to work smarter not harder.
                    Forty plus years and I still have ten toes, ten fingers and both eyes. I must be doing something right.

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                    • #11
                      QC aloris bit

                      I too learned in trade shool to grind tools I still use hss tools for most of my work at the home shop. I have ground threading bits for internal and external threads. I have however surcumb to modern tecnology by investing in an Aloris bit for the threading tool holder. I figure it will last a lifetime in the home shop. The beauty of this is the angle is built in just dress the top as needed. Also you can reverse the spindle and use the bottom of the tool and thread left handed.


                      http://www.use-enco.com/CGI/INSRIT?P...PMPXNO=4839934

                      Used it the other day for a 10-32 thread works great.
                      Tin Falcon
                      Ad maiorem dei gloriam - Ad vitam paramus

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