The Bearing Glossary by Alpine Bearing

Bearing Glossary:

  • Angular contact bearings: have inner and outer ring races and can bear combined (radial and axial) loads simultaneously.
  • Ball bearings: are components with two round, channelled races containing steel balls. The balls roll in the groove to distribute loads and reduce friction between two surfaces.
  • Ball separators: remove bearings, gears and pulleys for replacement, lubrication, or repair.
  • Bearing cages: keep the balls in the races symmetrical and correctly spaced, holding the bearings together. We can also call them ball bearing retainers or ball separators.
  • Bearing housings: are modular assemblies which make it easy to install bearings and shafts, while protecting bearings, extending their operating life, and simplifying maintenance.
  • Brinelling: is a permanent indentation caused by excessive loads, repeated impacts, and excessive force.
  • Bore: is the diameter of the inner race of a bearing.
  • Burring: occurs during machining when sharp edges or burrs appear. Use a deburring tool to smooth edges
  • Bushings: are thin tubes or sleeves that reduce friction and facilitate motion by sliding between two surfaces, not rolling, like a bearing.
  • Chamfer: is a cut, similar to a bevel, where two surfaces meet at a sharp angle. Chamfering eases assembly and reduces the possibility of injuries to machinists.
  • Deburring: is the process of removing burrs (raised edges or small pieces of material) that remain attached to an item after machining. Use a deburring tool to remove them and smooth the area.
  • Dynamic load rating: is the measurement of the load that determines the travel distance or number of revolutions without fatigue.
  • Fatigue: is the failure, separation of materials, or cracks in the balls or races caused by wear.
  • Friction: is the resistance that one surface or object encounters when moving over another.
  • Galling: is a form of wear caused by a combination of friction and adhesion between sliding surfaces
  • Lubrication: is essential for the performance and life of roller bearings. The lubricant separates moving parts to minimize friction and prevent wear. Some lubricants provide load-bearing protective film and prevent overheating of the bearing while providing protection from corrosion, moisture, and contaminants.
  • Machining: involves milling or turning an object to finish or hone it.
  • Milling: is a process in which an object stays still and the tools, which cut or shape metal, rotate.
  • Races: are the grooved rings where the balls rest. Bearings generally have inner and outer races.
  • Radial ball bearings: support radial and axial loads.
  • Spalling: is the process when bearings spall or shed flakes of material as a result of impact, corrosion, or rolling pressure.
  • Spindle bearings: are single-row angular contact ball bearings that can withstand both radial and (in one direction) axial loads.
  • Static load rating: is the ratio between the basic static load rating and the maximum combined static load applied to the bearing, dependent on the types of applications and the operating conditions.
  • Swarf: are metal chips or filings that fall or fly off during machining.
  • Tribology: is the study of friction, wear, lubrication, and bearing design.
  • Turning: is a process in which an object rotates and the tools acting on it are stationary. We associate turning with woodworking and lathes.
  • Vernier caliper: is a tool to measure bearings and bearing components. The caliper measures the inner diameter (ID), outside diameter (OD), and the width (W). We describe the dimensions as ID x OD x W.
  • Wear: is damage, erosion, or destruction by friction or use.

Source: Alpine Bearings

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