Power drawbar for mill

[Janderso]

Hello, I built this over the last several weekends, it utilizes 1/2 guide rods and an 1.5 bore x 1" travel air cylinder with internal return spring and 3 air solenoids on a common manifold. It is controlled by a maintained push button for the down motion and a SPDT momentary spring return for the forward reverse rotary motion. The only real problem I ran into was that the down motion is so rapid it would dislodge the socket at the end of the travel limit. The simple solution was to open the existing socket keeper hole to a #7 drill and tap to a 1/4 20 for a set screw.

No more problems with a dislodged socket.
View attachment 401365

I want one.
How did you do it?
Do you have a plan from some source or is this your invention?
Super sweet!!!

 

[fillister]

I want one.
How did you do it?
Do you have a plan from some source or is this your invention?
Super sweet!!!

Hello Jeff,

It's a very simple gizmo,
2 - pieces of 1/2 T6 plate for the round circular parts.
2 - pieces of 1/2 oil hardened drill rod.
1 - piece of 3/4 x 1 T6 bar or the top cross bar and heim joint connector.
1- piece of 2 x 1 T6 for the manifold, these can be purchased premade but their 4 port.
A horror freight palm impact, I had an old one hanging on the rack in the garage.
2 - 1/2 x 1/2 flange bushings
3- 120 volt air solenoids as I already had 120 V in the control panel.
2 - carling switches, carling switches are nice and smooth as opposed to switches at the box stores which suck.
1 - 1.5 bore 1" stroke air cylinder with internal spring

There are many designs on the net and and long thread on this site. I just tried to simplify and make a clean design.

Yes I created a complete set of drawings, but I'm hesitant about posting anything on the net, I'm not accusing anyone here but I've seen way to many instances where a designers work is renamed and sold on ebay and facebook by some unethical creep.

This is a great site and full of very talented people, I'm humbled by the comments.