#Drummond lathe restoration install#

I know this info is available on the web, but my search skills aren't up to finding it. If you want to be sure you will need to find the torque capacity of all of the components. I'm confident about the above plan but being relatively new to this I don't want to bugger it up so thought I'd ask for advice first. Only trouble is the belt snapping would require spindle removal in order to replace, but I just thought I'd use a really wide belt to make it strong.

My other reasoning is that the belt drive will be smoother and quieter than the gears anyway.

#Drummond lathe restoration install#

I would install a mechanism (an arm with a pulley on a bearing) to set the belt tension.Дoes anybody see a problem with doing this? I don't think I'll need the backgear any more, the motor has a stepped pulley anyway and I can get it down to 600rpm at full motor speed on the lowest ratio, then I can slow that down further with the VFD, which should provide good power still since the motor is so big. The spindle is too close to the top of the headstock to take the main drive pulley, so I can't ditch the layshaft. I'm replacing the motor with a 3hp 3 phase unit and a VFD, so at the moment I'm planning on ditching the backgears completely and replacing the mechanism with a pair of taperlock timing pulleys connecting the layshaft to the spindle at a 1:1 ratio. Unfortunately all of the gears (4 in total) in this backgear mechanism have one or more missing teeth. The motor is underneath in the stand and connects to this layshaft via a linkbelt.

The headstock contains a layshaft which connects, via a backgear mechanism, to the spindle. I have an old Denford Viceroy lathe which I bought for cheap and have been restoring and ultimately plan to convert to CNC.