About to buy a Clausing Colchester 1336 Engine Lathe (Master Mark I)

[bradpj53]

This machine came with a Burnerd 8" 3 jaw, a Cushman 10" 4 jaw, a 12" faceplate, a steady and follow rest and this mystery chuck; I call it a chuck because it seems the right size to mount on this l) spindle. Whatsit?

PO kept his QCTP so I'll be shopping for one.

 

[wayback machine]

Ooooh - You got the follow rest, too .......

 

[wayback machine]

PO kept his QCTP so I'll be shopping for one.

A while ago, I got a can't refuse offer on an Aloris CXA, and that's what I use on mine - Some will tell you that's too large.
My lathe came with an import BXA, but I LOVE the bigger Aloris - I use 5/8" insert tooling mostly, the adjustment range works ferfectly with that size, and the extra mass helps, I think.
Also, that size looks "right" on this lathe, to my eye, anyway.

 

[bradpj53]

Any ideas on the odd chuck-like thing (pictured with a tape measure)?

 

[Weldingrod1]

Probably slots to take the tail of a drive dog. Plus, four slots can give you 4 start thread indexing.

BTW, my Hardinge has a 2 speed motor also. I added roller switches to the high/off/low drum that kick in the vfd after the main contacts close. Works great!

Sent from my SM-G715A using Tapatalk

 

[Beckerkumm]

When you go from low to high, how long do you wait before re energizing the vfd? Dave

 

[wayback machine]

Any ideas on the odd chuck-like thing (pictured with a tape measure)?

I was curious about this also, and asked over on PM, and that was the consensus there also - Dog driver.

 

[Firstram]

When you go from low to high, how long do you wait before re energizing the vfd? Dave

I don’t think you can switch back and forth, you’d need to reprogram the VFD.

 

[bukwirm]

I don’t think you can switch back and forth, you’d need to reprogram the VFD.

Many VFDs allow you to have two motor profiles that you can switch between.

 

[Beckerkumm]

I may be wrong but I don't believe the issue is whether the vfd can be programmed for multiple motor parameters but whether it needs the power switched off to change motor speeds. A Dahlander motor with 8 poles that allow 4 to drop out needs to be wired internally such that the drum switch swaps leads to the motor. that in effect means that the motor is being disconnected and reconnected. If the vfd can be powered up but not running the motor while the drum switch is swapping leads, all is well. If the vfd needs to have the power off to do so, there needs to be time between powering down and restarting . In effect the drum switch is between the vfd and the motor. Dave