The engineer's sketch-book of mechanical movements, devices, appliances, contrivances and details employed in the design and construction of machinery for every purpose

by Thomas Walter Barber

Section 70.—RELIEVING PRESSURE ON BEARINGS. ANTI-FRICTION BEARINGS.

[1230]. The pivots of two rollers or shafts bear against the inside of a stiff ring producing rolling contact, but the rollers or shafts must run in the same direction. Used for roller mills, &c.

[1231]. The same device, but for three rollers or shafts.

[1232]. The shaft is guided vertically and its weight is borne by a large roller with small pivots.

[1233]. The shaft runs in the V between two rollers as last described.

[1234]. Roller or ball bearing. The friction is least when the rollers have end pivots to run in loose rings so that the rollers are kept apart and do not rub each other in revolving.

[1235]. Hydraulic bearing, the shaft being sustained by water (or preferably oil) pressure.

[1236]. Vertical shaft, with cone rollers.

[1237]. Vertical shaft, with ball bearing.

[1238]. Vertical shaft, flanged and coned for cone rollers.

[1239]. Ordinary swivelling castor.

[1240]. Ball castor.

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