Lathe Turret

Results 1 to 5 of 5

Thread: Lathe Turret

  1. #1
    Member
    Join Date
    Jul 2014
    Posts
    8
    Downloads
    0
    Uploads
    0

    Default Lathe Turret

    I am looking to design and build a lathe tool turret for my Graziano SAG12 lathe that I am converting to CNC. I have been looking for a small diameter tool turret for an economical price but have not found one that will suit my needs as most are too big for my swing on the lathe. I have been doing a bunch of research and have found various methods for accomplishing the indexing (Curvic Couplings, ratcheting, etc.) I am wondering if a SPRAG clutch or one-way bearing would work for this purpose. Of course it would only be able to rotate one direction but the ratcheting ones I seen seem to operate the same way. To me this seems like a clean, no-backlash, way to accomplish the indexing operations that are required for a turret. I suppose I missing something since someone hasnt tried it yet? I was looking at a 62mm outer race and an inner race that would accomodate a 30mm shaft. I would do one on the forward end and one on the aft end. Some of the specs are as follows..

    CSK30 bearing
    Torque capacity: 180Nm

    Max overrunning speed: 4,200rpm
    Bearing load dynamic: 11.7kN
    Bearing load static: 6.45kN

    thanks for your help in advance...

    Similar Threads:


  2. #2
    Member
    Join Date
    Feb 2018
    Location
    United States
    Posts
    2
    Downloads
    0
    Uploads
    0

    Default

    Quote Originally Posted by hods1222 View Post
    I am looking to design and build a lathe tool turret for my Graziano SAG12 lathe that I am converting to CNC. I have been looking for a small diameter tool turret for an economical price but have not found one that will suit my needs as most are too big for my swing on the lathe. I have been doing a bunch of research and have found various methods for accomplishing the indexing (Curvic Couplings, ratcheting, etc.) I am wondering if a SPRAG clutch or one-way bearing would work for this purpose. Of course it would only be able to rotate one direction but the ratcheting ones I seen seem to operate the same way. To me this seems like a clean, no-backlash, way to accomplish the indexing operations that are required for a turret. I suppose I missing something since someone hasnt tried it yet? I was looking at a 62mm outer race and an inner race that would accomodate a 30mm shaft. I would do one on the forward end and one on the aft end. Some of the specs are as follows..

    CSK30 bearing
    Torque capacity: 180Nm

    Max overrunning speed: 4,200rpm
    Bearing load dynamic: 11.7kN
    Bearing load static: 6.45kN

    thanks for your help in advance...
    Hello. Just curious, did you ever end up making this? I have actually considered a similar design using a slightly smaller sprag clutch but still the same idea. I’d love to hear how it worked out if you did finish it!

    Last edited by GTOhlms; 07-10-2019 at 08:32 PM.


  3. #3
    Member
    Join Date
    Jul 2014
    Posts
    8
    Downloads
    0
    Uploads
    0

    Default Re: Lathe Turret

    Quote Originally Posted by GTOhlms View Post
    Hello. Just curious, did you ever end up making this? I have actually considered a similar design using a slightly smaller sprag clutch but still the same idea. I’d love to hear how it worked out if you did finish it!
    I didn't end up going that way. I found a 8 position lio shang turret that was already to the point where I could integrate it. I am working on getting the hydraulic piece of it done for the locking and then probably drive the movements with a stepper or with the original hydraulic motor. It was intriguing to me to see if the sprag would work though and I would've done it but this turret came through for a good price.

    Sent from my SM-G960U using Tapatalk



  4. #4
    Member
    Join Date
    Feb 2018
    Location
    United States
    Posts
    2
    Downloads
    0
    Uploads
    0

    Default

    Quote Originally Posted by hods1222 View Post
    I didn't end up going that way. I found a 8 position lio shang turret that was already to the point where I could integrate it. I am working on getting the hydraulic piece of it done for the locking and then probably drive the movements with a stepper or with the original hydraulic motor. It was intriguing to me to see if the sprag would work though and I would've done it but this turret came through for a good price.
    Sent from my SM-G960U using Tapatalk
    Gotcha sounds cool. I’m doing mine for a much smaller lathe (Emco Compact 5) that I completely redid and upgraded. I have all of the material and hardware and plan to start putting together in the coming weeks. I too plan to use a stepper motor to drive but I am still up in the air about how I want to keep track of it’s position. I considered a closed loop stepper or cam roller limit switches but will probably settle for an encoder on one end. If it works out I’ll share some pics. If it doesn’t, Ive made the design in such a way I could substitute a ratchet and pawl system but I really liked the idea of the sprag. I guess I’ll control it all with an Arduino or Adafruit or something.

    Anyway, hope yours works out!



  5. #5
    Member
    Join Date
    Jul 2014
    Posts
    8
    Downloads
    0
    Uploads
    0

    Default Re: Lathe Turret

    Quote Originally Posted by GTOhlms View Post
    Gotcha sounds cool. I’m doing mine for a much smaller lathe (Emco Compact 5) that I completely redid and upgraded. I have all of the material and hardware and plan to start putting together in the coming weeks. I too plan to use a stepper motor to drive but I am still up in the air about how I want to keep track of it’s position. I considered a closed loop stepper or cam roller limit switches but will probably settle for an encoder on one end. If it works out I’ll share some pics. If it doesn’t, Ive made the design in such a way I could substitute a ratchet and pawl system but I really liked the idea of the sprag. I guess I’ll control it all with an Arduino or Adafruit or something.

    Anyway, hope yours works out!
    That sounds awesome. I would love to see some pics of it. I will take some pics of mine too.

    Sent from my SM-G960U using Tapatalk



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

Lathe Turret

Lathe Turret