Thread: Spindle Grease
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19-11-2019 #1
I working with a china vertical mill/drill, ZX50 clone.
The gearbox is a 4 speed unit.
The spindle needs lubricated with grease via a nipple on the front.
When i use the mill on it's fastest speed, which i need for steel.
Grease starts to egress via the lower bearing and drops on to the work.
The spindle is not getting hot - i read about 40C after it's been running for 30mins.
(i can imagine that the inner temps of the bearing will be higher)
Can anyone suggest -
a) a better grease that won't drop out
b) some other type of cure.
thanks
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19-11-2019 #2
Grease will always drop out to an extent, but if it's doing it excessively, then it's a sign you're putting too much grease in.
For a spindle, I'd only be looking to inject maybe a single grease gun stroke every 50 hours of spindle run time, and I'd be injecting it slowly with the spindle running to ensure it's evenly distributed.
Bearings don't need a lot of grease (typical bearing load is only 25-30% of available free volume), and too much grease will do damage (it can cause the balls/rollers to slide, rather than rotate).Avoiding the rubbish customer service from AluminiumWarehouse since July '13.
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19-11-2019 #3
Many thanks for the info.
Clearly then i have probably over lub'd it.
What type of grease (that's available in the UK) would you suggest ?
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20-11-2019 #4
If you've not got anything that specifies a grease, I'd just go for a good quality lithium grease.
Avoiding the rubbish customer service from AluminiumWarehouse since July '13.
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24-11-2019 #5
Thanks.
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