Mrcrankyface
Plastic
- Joined
- Aug 13, 2018
Hello everyone!
I've been recently considering swapping to a VFD on my -47 K&T 2HL.
Doing this I've been considering ramping the frequency up a bit to get more speed out of top gear, maybe up to 2000rpm if that's feasible, would be roughly 70hz instead of 50.
The entire vertical head has conical roller bearings so I'm sure that could handle more than current max of 1410rpm if I use less preload.
The knee itself is completely disconnected mechanically due to my CNC conversion so nothing can get damaged there from the speed increase.
What remains is the main spindle gearbox and whatever else might be connected inside the back/pillar.
As far as I can tell from the spare parts manual, everything in the back seem to be on bearings which I just assume should be able to do a bit higher speeds?
Any input on this would be greatly appreciated, don't want to do something stupid here.
Here's my thread about the machine itself.
https://www.practicalmachinist.com/vb/cincinnati-milacron-kearney-trecker-vn-usa-heavy-iron/k-t-2hl-universal-353668/
I've been recently considering swapping to a VFD on my -47 K&T 2HL.
Doing this I've been considering ramping the frequency up a bit to get more speed out of top gear, maybe up to 2000rpm if that's feasible, would be roughly 70hz instead of 50.
The entire vertical head has conical roller bearings so I'm sure that could handle more than current max of 1410rpm if I use less preload.
The knee itself is completely disconnected mechanically due to my CNC conversion so nothing can get damaged there from the speed increase.
What remains is the main spindle gearbox and whatever else might be connected inside the back/pillar.
As far as I can tell from the spare parts manual, everything in the back seem to be on bearings which I just assume should be able to do a bit higher speeds?
Any input on this would be greatly appreciated, don't want to do something stupid here.
Here's my thread about the machine itself.
https://www.practicalmachinist.com/vb/cincinnati-milacron-kearney-trecker-vn-usa-heavy-iron/k-t-2hl-universal-353668/