Summary. Description Selection characteristics Advantages/Disadvantages Applications. Sleeve Bearings. Plain Bearings Journal Bearings Bushings. Sleeve Bearing. Description:. Bearing used to constrain, guide, or reduce friction in rotary applications.
Type of Lubrication
PV ratingSelection Characteristics
Relative softness (to absorb foreign particles), reasonable strength, machinability (to maintain tolerances), lubricity, temperature and corrosion resistance, and in some cases, porosity (to absorb lubricant).
A bearing element should be less than one-third as hard as the material running against it in order to provide embedability of abrasive particles.
Whitemetal - usually used as a lining bonded to bronze, steel or cast iron.
Copper Based alloys - most common alloys are copper tin, copper lead, phosphor bronze: harder and stronger than whitemetal: can be used un-backed as a solid bearing.
Aluminium based alloys - running properties not as good as copper based alloys but cheaper.Materials
3/4" shaft @ 341 RPM, 90 lb. total load, bearing length 1".
V = .262 x RPM x shaft diameter, or .262 x 341 x .750 = 67 sfpm.
P = total load ÷ projected area (area = .750 x 1.0 = .75 in.), or 90 lbs. ÷ .75 = 120 psi.
PV = 120 psi x 67 sfpm = 8040 PV
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