PM 45 Z axis Linear bearings

Results 1 to 6 of 6

Thread: PM 45 Z axis Linear bearings

  1. #1
    Member
    Join Date
    Mar 2013
    Location
    usa
    Posts
    6
    Downloads
    0
    Uploads
    0

    Default PM 45 Z axis Linear bearings

    Hey guys, I wanted to share my linear bearing install/ upgrade on my grizzly PM 45 clone. I decided to do the linear bearings when I figured out the ways on the z where worn pretty badly. I had been trying to figure out why this mill always had a hard time with chatter. It turned out that the used mill wasn't taken care of too well and there was .020 ware toward the bottom of the ways. The linear bearings are HIWIN HGH25. I bought them from ebay new at a great price, around $200 bucks. So far I machined the z axis saddle and the ball nut mount. I then cut the dove tails just behind the top. I had to remove them to clear the new bearings and still be able to use the scrapped surface to mount the slides to. So far they are nice and smooth. I hope to pick up the z rapids to 100 ipm or more. Before I was only able to get it to 75 ipm.
    PM 45 Z axis Linear bearings-img_0803-jpgPM 45 Z axis Linear bearings-img_0805-jpgPM 45 Z axis Linear bearings-img_0818-jpgPM 45 Z axis Linear bearings-img_0822-jpgPM 45 Z axis Linear bearings-img_0822-jpgPM 45 Z axis Linear bearings-img_0823-jpgPM 45 Z axis Linear bearings-img_0830-jpg

    Similar Threads:
    Attached Thumbnails Attached Thumbnails PM 45 Z axis Linear bearings-img_0796-jpg  


  2. #2
    Member pastaman's Avatar
    Join Date
    Jun 2018
    Posts
    10
    Downloads
    5
    Uploads
    0

    Default Re: PM 45 Z axis Linear bearings

    I'm liking what I see. Nice job! Please post more pictures and information on your mod as you progress.



  3. #3
    Member
    Join Date
    Feb 2012
    Location
    United States
    Posts
    37
    Downloads
    0
    Uploads
    0

    Default Re: PM 45 Z axis Linear bearings

    Look like things are going well. Nice work so far keep us updated.

    Sent from my SM-N960U using Tapatalk



  4. #4
    Member
    Join Date
    Mar 2013
    Location
    usa
    Posts
    6
    Downloads
    0
    Uploads
    0

    Default Re: PM 45 Z axis Linear bearings

    Here is an update video



  5. #5
    Member CS900's Avatar
    Join Date
    Aug 2006
    Location
    USA
    Posts
    563
    Downloads
    0
    Uploads
    0

    Default Re: PM 45 Z axis Linear bearings

    looks great! Throw a counterweight or some air shocks on the head and you'll be able to bump up your rapids a bit more.

    I'd be interested to see a part machined before and after the upgrade. I know my surface finish improved a bit when I did mine, but I did all 3 axis at once so it's hard to say what was just from the Z axis.

    Also...what motor are you running on it? it looks to be fairly substantial and direct drive.



  6. #6
    Member
    Join Date
    Mar 2013
    Location
    usa
    Posts
    6
    Downloads
    0
    Uploads
    0

    Default Re: PM 45 Z axis Linear bearings

    I had gas shocks on it before the upgrade. They didn't do much so I left them off. I am running a 4025 oz/in stepper on the z. The driver for it is a bit bigger then the 3hp vfd running the spindle.
    The surface finishes had improved quite a bit. I haven't really run the machine a whole lot yet. Just to make parts for the ATC I am building for it. I will be making some parts for a vw tdi swap I am starting. machining the fly wheel and adapter plate should be fun.



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
  •  


About CNCzone.com

    We are the largest and most active discussion forum for manufacturing industry. The site is 100% free to join and use, so join today!

Follow us on


Our Brands

PM 45 Z axis Linear bearings

PM 45 Z axis Linear bearings