Greg,

I used to work for a company that did a lot of work with Falk out of Milwaukee, WI.  The Falk standard for the two most common configurations of their gearboxes is as follows:

unfiltered splash lubricated: ISO 23/20/18
filtered with 40 micron wire filters: ISO 20/18/16

You can get a lot of information from the Pall corporation.  They make industrial oil filters and are experts in oil contamination.  Very helpful people and I'm sure they have a website.

Bill

Greg,

ISO 4406 provides guidance in charcaterizing the cleanliness of lube oils.  It is based upon counting the number of particles in given size ranges (>4 um, >6 um, >14 um) in a one ml sample.  This methodology has been adapted for use by some equipment manufacturers.

NAS 1648(National Aerospace Standard)provides similar guidance but uses a single characterization number to describe the particle size count and distribution in a 100 ml sample.

Regards,

Gunnar

Are you still looking for information?? I wrote a paper on this subject for a large Mining Group and will e-mail you a copy of this if you like.

ICW,

Yes please. Send it to greg.perry@hansen.co.za

Thank you.

ICW,

I would be interested in reading your paper.  Thank you.

Bill

w.geissele@pandrolusa.com

icw
can you send me the paper please?
You can mail it to mcravi@rediffmail.com

Hi icw please would you send it to me.
Best Robert
ferreiro@mweb.co.za

'geissele'
Read with interest your comments on FALK giving ISO codes on splash and filtered systems.
Why would one run a splash lubricated box four times dirtier than a filtered box?
I've seen 1500 HP FALK  boxes (bearings) fail in two years which is the result of running a box at ISO 23/20/18 and once the oil reaches this level of contamination, no bearing will last....... ask any bearing manufacturer.
I think gearbox manufacturers forget their boxes run on bearings - have no doubt they only consider the gears.
Agree with your comments about PALL Corporation - a good source of information on contamination control.

Hi icw,
please would you send to me the report you did.I had a major computer failure and the people who did the repair thought i had backed up so when they cleanded and installed a new hard drive i lost all.
many thanks
robert
ferreiro@mweb.co.za

icw, If possible I would also like to recieve your paper on oil contamination
Thanks Bob  bosha@pa.net