Re: Slider Bed Coefficient Of Friction
Dear Mr. Jon,
From your description, it seems that you have some kind of equipment with belt sliding on steel surface.
ISO 5048 mentions sliding friction coefficient between belt and steel rollers as 0.3 to 0.4 (as a consequence skew position of side rollers of steel). DIN 22101 (the copy which I have) mentioned somewhat higher value. Based on the aforesaid data, 0.4 may be a reasonable value for sliding coefficient. This is based on consideration that steel surface is bright, like machine polished, and without rust.
Better option would be to fit smooth and buffed stainless steel liners or UHMW polymer liners on MS support trough. This would tend to reduce the frictional drag (coefficient).
If need be you can consider this coefficient as 0.5 for sizing motor and to derive maximum belt tension. The actual expected coefficient is likely to be 0.35 and consumption of power accordingly.
Regards,
Ishwar G Mulani.
Author of Book : Engineering Science and Application Design for Belt Conveyors.
Email : parimul@pn2.vsnl.net.in
Tel.: 0091 (0)20 25882916 ■
Re: Slider Bed Coefficient Of Friction
Dear Jon,
A common practice with slider bed conveyors is to use a fabric backed belt (i.e. rubber top cover with fabric bottom). This helps to greatly reduce the friction drawback. Rubber bottom covers will require additional motive force and will make belt training more difficult.
My main concern for belt tracking is that you have indicated this is to be a reversible belt. These are always more difficult to train and are more sensitive to dirt build-up. Hopefully, your drive will be centrally located on the bottom of the conveyor -- not at one of the ends.
Regards, ■
Slider Bed Coefficient Of Friction
Please check out our website at ■
Slider bed coefficient of friction
I am working on a steel slider bed application and plan to utilize a style 150 MOR 2 ply slider bottom rubber/polyester belt. In performing the calculations to determine the required drive HP. what coeficient of friction would you recommend?
The center to center distance between the head and tail pulleys is ¡Ö 57 feet. The belt will only cycle half a revolution 57 feet forward, and then ¡Ö 57 feet in reverse. I am planning to use a "B" series V guide and 6" diameter pulleys. The pulleys will only be idlers, the belt will be terminated at a "movine wall" which will powere the belt back and forth. The plan was not to crown the head or tail pulleys.
Does anyone have any tracking concerns? ■