[mactec54]

No it all seems to be back to normal now. I think it needed some time to warm up that day. Otherwise I emailed Wafer (a while ago now!) about what grease to use if I was to strip, clean and regrease the spindle at some point.

The best type of Grease to use for Spindle Bearings Kluber IsoFlex NBU15, when Greasing a High-Speed Bearings like this, it needs to be a measured amount per Bearing.

I doubt that you would be striping the spindle down to clean the Bearings and regrease, by the time you need to do this the Bearings will be done and need replacing, you can calculate the Bearings life, using specs from any major Bearing Manufacture, plus find the measured Grease quantity required.

The Bearing used in your Spindle are most likely Sealed as most of these Spindles from Chinese manufacturers are, so are factory Grease filled by the Bearing Manufacture, not Greased by the Spindle Manufacture, so if they are sealed Bearings then Jianken would have no clue as to what Grease is used for the Spindle Bearings.

[crjohnson]

Thanks Mactec, they have the following listing but don't tell you what size is inside each spindle. I may order a spare set just in case they're ever needed.

https://www.alibaba.com/product-deta...41a63b975AWh1I

[Waynekofuco]

Thanks Mactec, they have the following listing but don't tell you what size is inside each spindle. I may order a spare set just in case they're ever needed.

https://www.alibaba.com/product-deta...41a63b975AWh1I

Keep us posted if you do source replacement bearings. If I order another Jainken Ill ask for a ceramic set as well. Though I don't know if I would have the skills/tools to replace them by myself...

Im thinking the JGL100/2.5-BT30 is the way to go, but still not sure about the 2/4pole setup.

[Waynekofuco]

I settled on the JGL100/2.5-BT30 4 pole, Thanks for all the input.

[Waynekofuco]

I rec'd the new spindle, pretty crazy the size difference of the spindle and the tooling. I won't be able the test the new spindle until I get the head stock sorted.
JGL-80 2.2kw 400hz ISO20 vs
JGL-100 2.5kw 800hz ISO30

[crjohnson]

Looks good! The more machining I do lately the more I wish I had ATC. Even just setting up the probe to locate features is slow with the ER20. The probe always needs adjusting..

[joeavaerage]

Hi,
second that.

I do a lot of very small parts and even more circuit boards using isolation routing. I'd dearly love an ATC spindle. It does not need to be powerful, my 24000rpm 800W spindle is fine as is, but
life would be so much better with a twenty tool carousel.

Of course ideally I go faster than 24000rpm and that would sort of indicate an HSK tool interface....all of which is possible just increasingly expensive.

Craig

[joeavaerage]

Hi,
that new spindle does not look that much bigger....but surprise, surprise very nearly double the weight. Sort of makes you think you've got the 'real deal' now.

Craig

[joeavaerage]

Hi,
which one depends really on the sort of work you want to do with it.

My choice would be for a spindle that has more torque at lower speeds, so that it could be used for steel, but retain as much high speed as possible for aluminum and engraving.
The Mechatron does that nicely, it as 1.6Nm of torque up to its 'rated speed' of 12000rpm and has constant power (ie reducing torque) from 12000rpm to 24000rpm. You might
say the best of both worlds.

The 12000pm GPenny has good torque (as good as the Mechatron), but is not characterized for speeds above 12000rpm. Its probably not recommended but I be prepared to bet that if you had a VFD
that could produce higher frequencies then you could push this spindle to 24000rpm.

Just because the Mechatron and the GPenny 12000rpm have better torque at lower speeds still does not really make them 'steel spindles'. Sure, they have more capability
to do steel but they are a long way from perfect for steel either.

The 24000rpm GPenny is rated for 24000rpm but naturally has lower torque (0.8Nm).

All three spindles are useful. The 24000rpm GPenny would be best for continuous high-speed work whereas the 12000rpm GPenny would be better for slower speeds, but could when pushed
do 24000rpm. The Mechatron can do both.

I like Mechatron....but they are so much more expensive. Are they truly worth that much extra? Depending on who you talk to some say yes and some say no. I personally have had an 800W Mechatron and
have used, and abused it for over ten years. Simply brilliant. Actually I have not really abused it, it has had it fair share of crashes but to be honest I treat it as well as I can. It is entirely possible that under the same
circumstances a Chinese spindle would do as well.

If I had the money I would buy a Mechatron. Otherwise, I would buy a GPenny 12000rpm, but use an 800Hz VFD so I could push it out to 24000rpm. The manufacturer does not claim that it can do that sort of service
but I feel sure it could without wrecking itself.

Craig