584,808 active members*
5,158 visitors online*
Register for free
Login
IndustryArena Forum > MetalWorking Machines > Tormach Personal CNC Mill > Tormach PCNC 770 Series 3 belt replacement?
Results 1 to 5 of 5
  1. #1
    Join Date
    Dec 2021
    Posts
    1

    Question Tormach PCNC 770 Series 3 belt replacement?

    After some milling, I opened the spindle cabinet and see a busted belt drive. Any brands or specific products that are compatible with the PCNC 770 Series 3? Anywhere to get a replacement belt? (Not from Tormach their shipping prices are insane and they will be closed the rest of this week.) Also what size belts should I be looking for?

  2. #2
    Join Date
    Feb 2009
    Posts
    281

    Re: Tormach PCNC 770 Series 3 belt replacement?

    Belts usually have their size marked on the outer- non wearing side. If it is a V belt and broken, just stretch it out and measure the length- that will be your size. IE if it is 35 inches long then it will be a 350 belt- then the width will usually be 3/8 (3L) or 1/2 (4L) so a 3/8 wide belt 35 inches long will be a 3L350

  3. #3
    Join Date
    Jan 2018
    Posts
    1516

    Re: Tormach PCNC 770 Series 3 belt replacement?

    Quote Originally Posted by akelrous View Post
    After some milling, I opened the spindle cabinet and see a busted belt drive. Any brands or specific products that are compatible with the PCNC 770 Series 3? Anywhere to get a replacement belt? (Not from Tormach their shipping prices are insane and they will be closed the rest of this week.) Also what size belts should I be looking for?
    From images I've seen it looks like a 'poly V ribbed belt'.
    Measure rib count, distance apart of ribs (center to center) and length of yours. They come in many variations.
    Page 28 will give you idea on how to figue what you need.
    https://dunbelt.com/catalogos/1.%20D...GO%20GERAL.pdf

    For example from the catalogue: A belt wwith 4 ribs - 2.34mm rib spacing - 500mm length (closest to it)... You would look around for: 495J4

  4. #4
    Join Date
    Dec 2021
    Posts
    2

    Re: Tormach PCNC 770 Series 3 belt replacement?

    Such a great And amazing informative post. Keep it up great work

  5. #5
    Join Date
    Nov 2013
    Posts
    402

    Re: Tormach PCNC 770 Series 3 belt replacement?

    I tried finding one at my big city belt and pulley supply store, but.
    NO LUCK.
    They sold a "close" size, but when I tried to install it, it was about 1/2" too small.
    I couldn't get it on no matter how hard I tried.
    So, I returned the belt and had to order the correct one from TORMACH.
    Sorry for the bad news.

Similar Threads

  1. Tormach PCNC 770 - Mach 3 - Windows 10
    By zipfactor in forum Tormach Personal CNC Mill
    Replies: 16
    Last Post: 07-22-2019, 07:09 PM
  2. Which one? Minitech GX 5 Axis or Tormach PCNC 770
    By Speed_Diesel in forum Drilling- and Milling Machines
    Replies: 7
    Last Post: 07-25-2015, 05:15 AM
  3. Tormach pcnc 770 advice
    By Hyrum in forum Tormach Personal CNC Mill
    Replies: 6
    Last Post: 07-28-2013, 02:46 AM
  4. PCNC 770 Tormach
    By inventor1227 in forum Tormach Personal CNC Mill
    Replies: 15
    Last Post: 03-13-2012, 07:51 PM

Tags for this Thread

Posting Permissions

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