Different types of Cages

Different types of cages


The reason of the cage is to hold and divide the rolling elements (balls) of the bearing.

The mainly ordinary types of cage used for small ball bearings are the two piece ribbon and the one piece steel crown types. The crown kind is superior suitable to low torque, low speed applications. These two types of cage are identical in the majority of applications. These cages are typically ready from steel, with the steel grade depending upon the producer. Cages may be made from brass, SAE52100 chrome steel or stainless steel; AISI302, AISI410, AISI430 or AISI440C .Larger bearings typically use a two piece steel riveted cage allowing for superior loads, and extra vibration and hastening stresses.

Bearings with no cage and additional balls are called full complement ball. Usually these bearings permit for superior loads but slower speeds than caged types. These bearings have a filling slot on the rim of either the internal or external ring. This is where the extra balls are inserted during assembly.


One-piece Steel Crown type


“W” Type: One piece steel crown. Mostly used in very tiny bearings. This kind of cage is internal ring guided. Material is kind 410 stainless steel. The cage snaps in from one surface over the balls. It has brilliant presentation in low torque, low speed applications. usually, the one piece steel crown is not used in high speed applications.

Two-piece Steel Ribbon Type


“J” Type: Two piece ribbon consisting of two halves that are assembled one half from one side, and the other half from the opposite side. Fold down tabs safe the two halves. This kind of cage is guided by the balls. “Loose” clinch kind provides minor torque. Material is type 302 stainless steel.

Two-piece Steel Rivet Type


 “RJ” kind: This kind of cage is appropriate for bigger bearings with high load moving capacities. It is a two piece ribbon consisting of two halves that are assembled one part from one side, and the other part from the opposite side. The two pieces are engrossed jointly and are strong sufficient to with stand higher levels of shaking and acceleration. This kind of cage is guided by the balls. Material is kind 302 stainless steel or carbon steel sheet.

One-Piece Nylon Crown Type


One-piece Molded nylon cage. Reduces fluctuations in running torque and is proper for high speeds. This kind of cage is guided by the balls. The operating warmth range is from -30º C to +120º C. Also, presented with a glass fiber unbreakable nylon that is extra rigid and able of higher speeds.

Full Complement of Balls


This kind of bearing has no cage but maximum probable number of balls. Due to the fact that the internal and external ring has a filling slot, the axial load carrying capability of this bearing kind is low. This kind of bearing is appropriate for high radial load, low speed applications.

Pressed steel Shield


Pressed cages bearings usually are ready of sheet steel and with some exceptions of sheet brass. Depending on the bearing category pressed cages are designed as

  • ribbon-type brass or steel cage
  • riveted steel cage
  • snap-type brass or steel cage
  • Extremely strong window-type steel cage.


Steel Shield with snap Ring


Steel shield retained in outer ring. Low ingress of contaminants. Mostly used for lesser or narrower bearings. Single row deep groove ball bearings with a snap ring groove can make simpler the design of an arrangement because the bearings can be situated axially in the housing by a snap ring. This saves gap and can extensively decrease mounting time. They can be supplied separately or fixed to the bearing.

Teflon Seal with snap ring


Teflon seal reinforced with glass fiber is retained in external ring by snap ring. Low entrance of contaminants. Mostly used for lesser or narrower bearings. Seal can bend to accommodate inner force changes.Snap rings fasten the assemblies on shafts or in housing/bores. Retainer rings are more proficient and cost-effective than traditional fasteners like screws, nuts, bolts, cotter pins, and washers.

Contact rubber Seal


Contact Rubber seal fixed into outer ring. Light contact with inner ring, retains oil and prevents ingress of external contaminants. Contact rubber seals are prepared of oil and wear-resistant NBR or FKM and are reinforced with a sheet steel insert.SKF solitary row deep groove ball bearings with a contact seal made of NBR on one or both sides are manufactured in four designs depending on the bearing:

Non-Contact rubber Seal


Non-contact rubber seal fixed into outer ring, still provides effectual sealing.

Non-Contact Seals are the great solution for any application that cannot give frictional power loss, contagion or planned maintenance issues that arrive with general contact seals. Non-Contact or Labyrinth Seals give Zero friction, Zero wear, and Zero maintenance.Non-Contact Seals may be used as an option even to contact or rubber seals, especially at superior speeds.


No comments.

Leave a Reply