1. #1
    I want a spindle lock so I can prevent any shift on the milling spindle when I do finishing cuts.

    Pneumatic seemed the best bet for CNC control so I just bought a ram (32mm piston, 5mm stroke) and a solenoid valve off fleabay.

    Started designing complicated lever mechanisms to tighten the spindle lock bolt, then it occured to me it could be totally simple.

    If I drill a clearance hole through one end of an iron bar.

    Put it under the spindle lock bolt head, as you would a washer.

    Put the ram so it tries to lift the other end and tilt the iron bar "washer".

    Surely that would lock the spindle with lots of leverage, be totally adjustable and I can still lock the spindle manually if I feel like it.

    So why won't it work? Nothing can be that simple :D

  2. #2
    Quote Originally Posted by Kip View Post
    3 questions and no answer ;) :D

    1: Yes
    2: Yes
    3: Yes

    Got the dinky rams today, two for 8.50 including postage :D
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	slock.jpg 
Views:	208 
Size:	77.4 KB 
ID:	55  

  3. #3
    Quote Originally Posted by Robin Hewitt View Post
    two for 8.50 including postage :D
    Nice one mate, cant complain at that price !

    Just done a bit of work on the site logo and the white area around it, what do you think?

  4. #4
    Not enough power.

    My machine doesn't have a cotter it uses a pair of wedge thingies that need pinching together.

    The cylinder will give me around 100 lbf with shop air, reckon I need more like 500 lbf.

    The idea is to use a crowbar action between the spindle lock bolt and the non-threaded wedge thingy :D

  5. #5
    Quote Originally Posted by Kip View Post
    More details needed...or your account has been hijacked :D
    I would hate to get black-balled, have a pic :D
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	slock2.jpg 
Views:	194 
Size:	28.4 KB 
ID:	56  

  6. #6
    Quote Originally Posted by Kip View Post
    Should work Robin :)
    Whether it works or not rather depends on the quality of the bolt. That's the weak link, if the shank bends I will need to think again. May have problems finding a suitable bolt.

    I've got the valve, now waiting on the postman for the pneumatic hose and fittings.

    Wonder if the solenoid coil is rated continuos, may need to add a fat cap and resistor to reduce the holding current. I bought two coils so I can afford to have a whoopsie :D

Similar Threads

  1. Auto zero Z axis problems
    By Jumbo in forum Probing, Digitizing & Scaning
    Replies: 26
    Last Post: 23-10-2016, 02:00 PM
  2. What Spindle / Auto Tool Changer?
    By Chaz in forum Tool & Tooling Technology
    Replies: 11
    Last Post: 01-08-2013, 09:35 PM
  3. Spindle lock mechanism for 2.2kW china spindle
    By Jonathan in forum Generic Chinese Spindles
    Replies: 8
    Last Post: 13-08-2012, 07:39 PM
  4. z-axis lock
    By JasonM in forum Gantry/Router Machines & Building
    Replies: 3
    Last Post: 27-10-2009, 07:26 PM
  5. any one know about auto lube systems?
    By graffian in forum Milling Machines, Builds & Conversions
    Replies: 0
    Last Post: 02-03-2009, 04:52 AM


Posting Permissions

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