What is a bearing keeper?

What is a bearing keeper?

The ball bearing cage (also known as a ball bearing retainer or ball separator – these are used interchangeably), is the component in a ball bearing that separates the balls, maintains the balls symmetrical radial spacing, and in most cases, holds the bearings together.

What is the purpose of a bearing retainer?

The function of a retainer is to maintain proper distance between rolling elements. The function of a retainer is to maintain proper distance between rolling elements. Almost all roller bearings have stamped retainers made of iron-silicon bronze or lead brass.

What is retainer in bearing?

Ball bearing retainers (also known as a cages or ball separator – these are used interchangeably) are components in ball bearings that separates the balls, maintain the balls symmetrical radial spacing, and in most cases, holds the bearings together.

Why do bearings have cages?

The function of a bearing cage (also known as a separator or a retainer) is to hold rolling elements in proper orientation so they don’t group together. Bearing cages are produced in a wide variety of materials and for a wide variety of manufacturing processes.

Which type of bearing do not need cage?

full complement bearings
Bearings without a retainer are called full complement bearings. This is because they have more balls which allows them to take heavier loads. They also cope with sudden shock loads (impact loads) as the increased number of balls distributes the load across the bearing raceway more effectively.

What causes bearing cage failure?

Vibration and impact of the moving surfaces of a bearing under high pressure conditions also affects the cage life. Moreover, large forces at the cage-ball and cage-race contacts cause cage failure. Therefore, cage design is improved by increasing the looseness at the ball pocket and race.

What is the race of a bearing?

Races are essentially tracks that allow the balls within ball bearings to glide while generating little or no friction. They offer a fixed path on which the balls can roll. Ball bearings require races to control their respective balls. With races, the balls can roll along a fixed path.

How do you choose a shaft bearing?

Selection of bearing type

  1. Installation space. Bearing can be installed in target equipment.
  2. Load. Load magnitude, type and direction which applied.
  3. Rotational speed. Response to rotational speed of equipment in which bearings will be installed.
  4. Running accuracy.
  5. Rigidity.
  6. Misalignment.
  7. Mounting and dismounting.

What are examples of bearing cup styles?


  • Deep-Groove Ball Bearings. The most commonly used bearings are Deep-Groove Ball Bearings.
  • Angular Contact Ball Bearings.
  • Self-Aligning Ball Bearings.
  • Thrust Ball Bearings.
  • Spherical Roller Bearings.
  • Cylindrical Roller Bearings.
  • Tapered Roller Bearings.
  • Needle Roller Bearings.

How do you check a wheel bearing for failure?

Vibration – a leading indicator of roller bearing wear Usually, before roller bearings fail, the problem appears in the form of vibration. For instance, when a roller bearing race becomes pitted, the bearing rollers will produce a vibration every time they run over the affected area.

What happens if a bearing fails?

If a wheel bearing goes bad, more friction will be placed on the wheel, and the wheel will start to wobble. There are a few signs to watch out for when your wheel bearing starts to go bad or is missing. A bad wheel bearing can lead to uneven tire wear, which means you will have to purchase tires sooner.

How do you check bearings?

In the case of small non-separable ball bearings, hold the bearing horizontally in one hand, and then rotate the outer ring to confirm that it turns smoothly. Separable bearings such as tapered roller bearings may be checked by individually examining their rolling elements and the outer ring raceway.

Which is the best supplier of ball bearings?

Bearings Direct is a ball bearings supplier with over twenty years of experience in the industry. Ball Bearings can be found in a large range of applications from door hinges to roller skates. If properly maintained and lubricated, they have a very long life span.

Why are ball bearings used on guide rails?

Made of stainless steel, these carriages and guide rails are more corrosion resistant than steel carriages and guide rails. These carriages and guide rails are steel. Designed specifically for use on horizontal surfaces, the contact angle of the ball bearings on the rail allows these carriages to last longer than other carriages.

What are the sizes of miniature ball bearings?

Inch Miniature Ball… Inch miniature ball bearings are available in bore sizes from 1/8 to 1/2 inch. These miniature ball bearings have a flanged outer ring and can be combined with ceramic, stainless steel, or plastic materials. Our inch size miniature ball bearings range from ABEC0 up to ABEC7 precision class.

What kind of bearings are used in roller skates?

Ball bearings consist of a series of round balls in a casing, within an inner and outer ring capable of supporting both radial and axial (thrust) loads. Ball bearings come in both single and double row configurations, in both metric and inch sizes, and can be found in a large range of applications from door hinges to roller skates.