• Scam Alert. Members are reminded to NOT send money to buy anything. Don't buy things remote and have it shipped - go get it yourself, pay in person, and take your equipment with you. Scammers have burned people on this forum. Urgency, secrecy, excuses, selling for friend, newish members, FUD, are RED FLAGS. A video conference call is not adequate assurance. Face to face interactions are required. Please report suspicions to the forum admins. Stay Safe - anyone can get scammed.
  • 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. Johnwa

    For my horizontal drive I use a serpentine belt from an auto parts outlet. The spindle has to...

    For my horizontal drive I use a serpentine belt from an auto parts outlet. The spindle has to be removed to install it.
    • Johnwa
    • Profile post comment
  2. Johnwa

    measure over pin method for gears

    A bit OT but a Mod 1 metric gear will mesh with an 8 tpi leadscrew close enough for a thread dial
  3. Johnwa

    Tips/Techniques Collets on a Unimat

    Check your downloads. It downloaded a pdf file for me. I was on the third download when I saw what it was doing.
  4. Johnwa

    foam for custom cases

    My son uses this as dividers in his equipment cases. https://www.amazon.ca/dp/B0C234L7DZ?ref_=cm_sw_r_apin_dp_0GMBMQP7MAQZA6ERNBX5&language=en-CA&th=1 it comes in 0.4” and 3.125” thicknesses
  5. Johnwa

    foam for custom cases

    Like this stuff from uline? https://www.uline.ca/BL_873/Pick-and-Pack-Foam
  6. Johnwa

    Tips/Techniques Unique uses for ball bearings

    I am picturing the balls traveling in a loop like in a ball nut. That would only allow for 1 axis of rotation though. It’s the only way I can picture it that doesn’t have the small balls piling up against the stem of the T. I only have experience with the ones used for supporting the outfeed...
  7. Johnwa

    Tips/Techniques Unique uses for ball bearings

    The small balls support the larger one. As the large one rotates against the work the smaller ones roll so there isn’t any sliding motion. I think the T shaped piece will have a hole through the center for the balls to travel through. That way they can continuously roll along their path
  8. Johnwa

    Half-Nut Engagement

    It is pretty simple but also easy to forget. The threads you mention all have a complete number of threads every ⅛”. Therefore you can close on any threads on the leadscrew. Even numbers of tpi have complete threads every 1/2”. Corresponding to 4 threads on the leadscrew. My thread dial has a...
  9. Johnwa

    Half-Nut Engagement

    That interface just indicates when you close the halfnuts. The halfnut/leadscrew is what determines the actual threading.
  10. Johnwa

    Half-Nut Engagement

    I don’t think it would make any difference. The gear would have to be worn to the extent that you could close on the next set of threads. For an 8 tpi that would require an error of ⅛”. In any case with an 8 tpi lead screw if you’re cutting an 8, 16, 24 tpi etc you can close at any point...
Back
Top