Taper Roller -pumpin action
Taper Roller -pumpin action
(OP)
Do taper roller bearings pump from the small end of the roller to the larger. This is now doing my head in.
Thanks in advance.
Thanks in advance.
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Taper Roller -pumpin action
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Taper Roller -pumpin actionTaper Roller -pumpin action(OP)
Do taper roller bearings pump from the small end of the roller to the larger. This is now doing my head in.
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RE: Taper Roller -pumpin action
RE: Taper Roller -pumpin action
Thanks.
RE: Taper Roller -pumpin action
Most critical applications now use grease for life method - with Kluber - this has to be run in & is very expensive - but it does work - rotations in excess of 4000/min.
RE: Taper Roller -pumpin action
RE: Taper Roller -pumpin action
Answering any of the sitautions & challenges (not problems !) in this forum has to be seen in context that we (especially "I" don't know the specifics & most of the answers are generalising.
To answer what you have stated depends on a few factors.
My experience on using Timkens (& SKF's, GAMET precison etc) is for machine tools spindles (v.Large radial drills & boring machines).
In the company I served my apprenticeship all these were oil lubed (in some cases hydraulic oil was the lubricant - which surprises some people - hydraulic oil is very good at high speeds).
The company I worked for had elaborate systems for controlling the volume of oil delivered - too much causes overheating) & the system is dependant on the oil pump.
Since then I have worked on grease lubed Timkens - operating at over 4000/min - for precision machining of automotive parts using diamond tooling. Most of these had a very long life before change out.
In all cases I have used (or tried to use) the Kluber "sealed" system where you pre fill the bearing after first very carefuly degreasing it (this has to be done with synthetic greases)the amount of grease is critical, the spindle has to be run in & you then block up the greasing points. All of these were pre-loaded.
I originally did this for one breed of machines - saw it worked & used the method (very successfully) on other things) with adjustments to type of grease(speed, application etc) & pre load.
Pre loading bearings s a subject in itself - again each application is specific to itself. (Size, speed, load etc)
This is why bearing makers are loathe to advise unless they know all the factors, notably Barden can offer a variey of lubes for any bearing they supply. Machine tool builders have formats for the amount of pre-load that suit their product applications, which re generally pretty wide.
If you have had bearing failure attributable to lube type, lube failure, excess of lube, etc dont blame Kluber.
Kluber is not just one product or general purpose grease - they have many types & grades within each type, that can be tuned to one application.
They have great expertise in getting to the right one, especially high speed - high temp. You also have to follow the directions as regards amount of grease & de greasing before applying Kluber.
I dont work for Kluber or represnt them in any way, but their products have solved many issues that I have come accross