Water cooled chinese spindle collets, Advice from owners please

[JAZZCNC]

Hey Jazz, How did you kill that 2.2?

My own silly fault, I'd had the spindle off a few times to check fit for some mounts I'd made for someone and didn't fasten the cable guide correctly, So over time the connector was bending and snapped wire inside main connector at the spindle causing dead short and great big blue flash.!!!!!. . . . . Killed both spindle and ABB350 VFD stone dead. .

[Ali Kat]

Whoa - expensive smoke!!!! Let me know if you want to part with the dead bits as it may be useful to have a couple of bearing housings on the spares shelf for my own 2.2.

Ali Kat

[JAZZCNC]

Whoa - expensive smoke!!!! Let me know if you want to part with the dead bits as it may be useful to have a couple of bearing housings on the spares shelf for my own 2.2.

Ali Kat

Nope sorry. It's going to be modified to belt drive then used either has a secondery slow running spindle for steel work or be used for the spindle of a mini lathe.?

Just don't ask when.!!

[Ali Kat]

Very good idea Jazz. The spindles seem to be fairly well built and certainly they are mechanically robust. Should make a good spindle with, perhaps, a multi step pulley to give speed variances etc. Put up some pics when it's done as I'm sure that you won't be the only owner to "kill" one of these spindles!

Ali Kat

[Jonathan]

Very good idea Jazz. The spindles seem to be fairly well built and certainly they are mechanically robust.

I wouldn't be so sure. They're well built for high rpm use...

I don't think it would make that good a spindle for a lathe, unless the lathe is very small, since it uses angular contact bearings. Most lathes use tapered roller bearings since their load ratings are much much higher. Angular contact bearings are the only bearings suitable for high speed and axial loads, but you don't need that high a speed on a lathe (unless it's something special) so why compromise the rigidity so much by using the wrong bearing type. Same is probably true for a spindle for cutting steel since again that's low rpm and you need higher rigidity for cutting steel.

[JAZZCNC]

I wouldn't be so sure. They're well built for high rpm use...

I don't think it would make that good a spindle for a lathe, unless the lathe is very small, since it uses angular contact bearings. Most lathes use tapered roller bearings since their load ratings are much much higher. Angular contact bearings are the only bearings suitable for high speed and axial loads, but you don't need that high a speed on a lathe (unless it's something special) so why compromise the rigidity so much by using the wrong bearing type. Same is probably true for a spindle for cutting steel since again that's low rpm and you need higher rigidity for cutting steel.

Yep but better than sat on a shelf or in the scrap bin.!!
Plus it's no big deal or expense to change the bearings know is it.! . . Remember Jonathan I'm the original