17 Apr
2016
17 Apr
'16
6:43 p.m.
From: drlegendre
If they use sleeve bearings, take a close look at the
material.. does
it have the sintered look of oil-impregnated bronze (Oilite)?
It looks like copper, actually; it's quite reddish. (The central pin seems to
be steel of some sort.) But I'm not familiar with Oilite, so I can't say for
sure.
Are there channels in the bearing to allow the
distribution or
retention of grease?
There's a section of reduced diameter in the center of the pin; the ends are
full diameter, with no grooves of any kind. The sleeve is a plain cylinder.
Those fans tend to run at pretty low RPM
Not these. They are doing very high RPM indeed.
Noel