Taggart, William Scott · London : George Routledge & Sons, Ltd. · leaf 66
for extra power is required to overcome friction, overand above the useful work that has to be done by a machine.This extra work also involves the wearing away of material. A variety of means are adopted to reduce friction—by theuse of lubricants, rc^llcr and ball bearings (^sce Fig. 66),… … R466 Example.—A wooden skip 30 lb. weight is filled with 200 lb. of yarn,the whole being pulled along the floor of a room. If the co-efficient of friction is 18, what is the force exerted to draw theskip along ? Total load producing friction = 30 +200= 230 lb. Resistance of friction = coefficient x…
Textile machinery
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