In workshops and factories, motive force (produced by a waterwheel or steam engine, for example) was transmitted to machines via a drive shaft, on which were usually fixed wheels driving machines with belts. The end of a drive shaft was held in the ‘bearing seat’, often cast iron and solidly fixed to the floor, inside which bearings enabled the shaft to turn freely without play. The cap maintains the bearings at the right pressure against the shaft. The ‘chair’ is the beam with which the bearing seat is fixed to a wall or ceiling. This hanger bracket was made by the Piat company, founded in Paris in 1831 and renowned for the quality of the transmission machinery in which it specialised. The particularity of this bracket is that it can be fixed in any direction.
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