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Thread: Spindle Grease

  1. #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

  2. #2
    m_c's Avatar
    Lives in East Lothian, United Kingdom. Last Activity: 17 Hours Ago Forum Superstar, has done so much to help others, they deserve a medal. Has been a member for 9-10 years. Has a total post count of 2,343. Received thanks 263 times, giving thanks to others 6 times.
    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.

  3. #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 ?

  4. #4
    m_c's Avatar
    Lives in East Lothian, United Kingdom. Last Activity: 17 Hours Ago Forum Superstar, has done so much to help others, they deserve a medal. Has been a member for 9-10 years. Has a total post count of 2,343. Received thanks 263 times, giving thanks to others 6 times.
    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.

  5. #5
    Thanks.

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