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  • Several Regions have held meetups already, but others are being planned or are evaluating the interest. The Calgary Area Meetup is set for Saturday July 12th at 10am. The signup thread is here! Arbutus has also explored interest in a Fraser Valley meetup but it seems members either missed his thread or had other plans. Let him know if you are interested in a meetup later in the year by posting here! Slowpoke is trying to pull together an Ottawa area meetup later this summer. No date has been selected yet, so let him know if you are interested here! We are not aware of any other meetups being planned this year. If you are interested in doing something in your area, let everyone know and make it happen! Meetups are a great way to make new machining friends and get hands on help in your area. Don’t be shy, sign up and come, or plan your own meetup!

Search results

  1. RobinHood

    Half-Nut Engagement

    Thanks @thestelster for your explanation. Since we are talking multi-start threads, I decided to check the manual for my Colchester Master 2500. My documents are off the internet as my lathe did not come with a manual. I have two versions of the manual, one newer than the other. The one manual...
  2. RobinHood

    Half-Nut Engagement

    I believe that you have interpreted that correctly. I wonder…. If you were to switch pairs (intentionally, or by mistake), would you cut a 2-start thread? Here is why I believe that could be possible… Look at, for eg, 4.5TPI. You can use 1 and 5 OR 3 and 7. Let’s look at 9TPI. You may use 1...
  3. RobinHood

    Metal lathe options

    Not in the reference I made. @VicHobbyGuy has provided a link in his post #155 to what I was referring to. I am surprised that you could not make it work, @VicHobbyGuy. I “cobbled one together” with just clamps and other scraps I had lying around and it did seem to work well. But it was not on...
  4. RobinHood

    Metal lathe options

    Perhaps look into tangential tools. Holders can be shop made and the cutting tool can be carbide blanks cut easily with a diamond wheel and then honed on a lap. The geometry is also easy as it gives all clearance angles by design. Cutting forces are also reduced because of its geometry.
  5. RobinHood

    Finally, a Makita battery fix.

    Well done John. Reminds of working with hydraulic lines or plumbing…. Go from one system via adapters / couplers / intermediaries to another and then back again…
  6. RobinHood

    Half-Nut Engagement

    That would make sense if there is single point dog clutch to reverse the lead screw. Once the half-nuts are engaged, they stay engaged and just the fwd/rev control of the lead screw is used for threading. This system does not lose synchronization with the spindle. Steve’s Hendey in the video has...
  7. RobinHood

    Half-Nut Engagement

    I think you are correct: using another mark on the dial will not necessarily give you a multi start thread - at least not predictably. What should give you a multi start thread though is if you advance (or retard) the drive gear on your spindle wrt the driven gear in your gear train by 1/2 turn...
  8. RobinHood

    Ball Bearing Collet Nuts

    Agree with David. I have one for the NMTB40-ER40 system. It is easier to torque compared to my non-bearing R8-ER40 system.
  9. RobinHood

    Fixerup patch up

    Very nice work with the machinable MT2 arbours. Beats trying to turn the taper yourself.
  10. RobinHood

    Half-Nut Engagement

    I don’t think you wasted anyone’s time! Certainly not mine. Had to think about your question and look / figure out how this actually worked. On all three of my lathes, the actual dial face (green arrow) is rotationally adjustable on the dial stem (red arrow) to make the dial face lines line up...
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