I need suggestions and advice on a permanently lubricated bearing selection for a lightly loaded, low speed, but continuous remote application that I can make as reliable as possible through higher quality hardware or clever design.
I am shooting for a zero maintenance design with higher end, but still off the shelf technology without going to some impossibly expensive exotic hardware if possible. In other words, the situation can justify 3-5 times higher bearing investment over typical decent quality bearings to extend the system's serviceable life.
The design requires a 12" x 3/4" shaft with only thirty lbs of stable, radial load shared equally between two bearings about 2.5" from the ends. Axial load <5 lbs.
Operation: Continuous 24x7x365. Shaft: Torque runs a stable, 50 ft-lbs at 600 rpm.
The environment: Closed room air quality, air temp 70-95 degrees F, humidity 50-70% non-condensing, no chips, flying dirt/dust/etc. I expect shaft temp to stay below 100-110 degrees.
I would like to hit a design life of 20 years. That might be doable or not (or maybe it could go longer), but this is outside my experience level and my digging around the Internet doesn't turn up anything like this. Maybe I am Alice dreaming here for that kind of life performance, but I can't help but wonder that someone out there in this community has seen a case like this that actually worked ... like back before when business 'managers' required stuff to be designed only so that would last until the end of the short warrantee period.
Any suggestions for bearing types, vendors, comments, other ideas, etc. are greatly appreciated!
Thanks!
B
I am shooting for a zero maintenance design with higher end, but still off the shelf technology without going to some impossibly expensive exotic hardware if possible. In other words, the situation can justify 3-5 times higher bearing investment over typical decent quality bearings to extend the system's serviceable life.
The design requires a 12" x 3/4" shaft with only thirty lbs of stable, radial load shared equally between two bearings about 2.5" from the ends. Axial load <5 lbs.
Operation: Continuous 24x7x365. Shaft: Torque runs a stable, 50 ft-lbs at 600 rpm.
The environment: Closed room air quality, air temp 70-95 degrees F, humidity 50-70% non-condensing, no chips, flying dirt/dust/etc. I expect shaft temp to stay below 100-110 degrees.
I would like to hit a design life of 20 years. That might be doable or not (or maybe it could go longer), but this is outside my experience level and my digging around the Internet doesn't turn up anything like this. Maybe I am Alice dreaming here for that kind of life performance, but I can't help but wonder that someone out there in this community has seen a case like this that actually worked ... like back before when business 'managers' required stuff to be designed only so that would last until the end of the short warrantee period.
Any suggestions for bearing types, vendors, comments, other ideas, etc. are greatly appreciated!
Thanks!
B