Part Ejectors - Sub Spindle lathe

[Greg Williams]

Hi All,

 

I need to get a small, about Dia 20 x 80 long part ejector for to fit into a Kitagawa N06 chuck. Does anybody know where I can get such a thing?

 

Thanks

[Mick]

Okuma Australia? Just a suggestion

 

Maybe Romheld?

[Greg Williams]

Mick, Tried those, No luck

[Mick]

Ah, fair enough.

 

I'd be doing what you've probably already done (Google).

 

Is it something you could make yourself?

[Sticky]

Maybe these pictures can give you some inspiration. I made a few of these for a Kitagawa B205. Kitagawa makes an ejector, but they wanted me to submit a bunch of drawings of parts so they could engineer the spring rates among other things, and they were $1200 and 8 weeks away.

 

I had a bunch of parts under 5/8" diameter that I couldn't pick with my robot so I whipped up about 5 or 6 of these assemblies. The unit replaces the chip guard in the center of the chuck, just remove 3 button heads and swap it out. The long set screw on the plunger is so I can thread on different ejector ends to suit different part geometries and standoffs from the face of the chuck. I bought three different springs of the same size, with different rates, so I could experiment with the needed force to eject the different parts. This is also the reason I made more then one assembly, once I have the correct spring and foot on the assembly, it can just stay assembled, and gets re&re'd as a complete assembly only. The main housing also has an oil impregnated bearing to help prevent the plunger and housing from galling and making the action stick.

[Machineguy]

Sticky,

That's a nice way of doing it.

 

Machineguy

[Greg Williams]

Sticky, Yep that is pretty much what i need, Thanks for the pics

[crazy^millman]

I ran into this same problem last week and that will do the trick. Thanks for that.

[Sticky]

Glad I could help.

[shawn22]

Would you happen to have a model of this part ejector that you made? It looks great and I can't seem to find one for our kitagawa B-205 chuck. 

If you could share that it would be greatly appreciated.  Or even just a drawing and I can create a model and send that to you. 

Thanks,

Shawn