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  • Dynaroll R-Series Ball Bearing, Double Shielded, Flanged, 52100 Chrome Steel
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Dynaroll R-Series Ball Bearing, Double Shielded, Flanged, 52100 Chrome Steel

Available in multiple versions

1 customer review

Product Specifications
Brand Name Dynaroll
Material Type 52100 Chrome Steel
Specification Met AISI 52100
UNSPSC Code 31171504

This Dynaroll R-Series ball bearing is double shielded, has a flanged oute... Read full product description



Product Features

  • Single row, deep-groove ball bearing for applications that support high speeds, axial loads in both directions, and radial loads
  • Metal shields on both sides of the bearing keep the lubricant in and contaminants out
  • AISI 52100 chrome steel for durability and resistance to deformity under heavy loads
  • Stainless steel cage evenly spaces balls for reduced friction, vibration, and noise
  • CN (normal) radial clearance for applications where thermal expansion is not a factor

Product Details

  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B0064OU6RS
  • Average Customer Review: 4.0 out of 5 stars  See all reviews (1 customer review)
  • Product Warranty: For warranty information about this product, please click here

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Product Description

This Dynaroll R-Series ball bearing is double shielded, has a flanged outer ring, and is made of American Iron and Steel Institute (AISI) 52100 chrome steel. The single-row, deep-groove ball bearing is suitable for applications that support high speeds, axial loads in both directions, and radial loads. It has deep inner and outer races that conform to the balls that run in them, allowing higher speeds and creating lower friction than bearings with comparable-sized roller bearings. The bearing has a metal shield on either side that is fastened to the outside ring and extends over the rolling elements. The shields assist in keeping out contaminants such as dirt and grime and also help to hold in a lubricant applied during manufacturing. The inner and outer rings and balls are made of low-alloy, through-hardened AISI 52100 chrome steel for durability and resistance to deformity under heavy loads. This bearing has a stainless-steel cage to prevent the balls from coming into contact with each other during use, reducing friction, vibration, and noise, and an external flange on the outer ring for easier mounting and axial positioning in the housing than straight bearings. It can be used to a maximum operating temperature of 121 degrees C/250 degrees F. The bearing has a CN (normal) radial internal clearance designation making it suitable for applications where the load and speeds do not result in thermal expansion. This clearance provides latitude for self-realignment and compensates for static and dynamic alignment errors. This ball bearing is for use in commercial and industrial applications including generators, pumps, original equipment or replacement parts in motors, office automation, farm equipment, and conveyor rollers.

Rolling bearings use rolling elements to maintain the separation between moving parts to reduce rotational friction and support radial and axial loads. These elements can be one of the following types: ball, cylindrical, spherical, barrel, needle, spindle, or tapered. All rolling bearings are open, shielded, or sealed. Sealed bearings are lubricated with oil or grease in the bearing factory, while open and shielded bearings are meant to be lubricated in place, with periodic reapplication of lubrication, based on use. The shield protects the working parts of the bearing from environmental debris that may be introduced and could reduce the ball bearing speed and lifespan. Rolling bearings are used in a range of applications from agricultural machinery to conveying equipment, robotics, dental equipment, elevators, rolling mills, ship rudder shafts, and aggregate crushers, among others.

Dynaroll Corporation manufactures miniature bearings and ball bearings that meet International Organization for Standardization (ISO), Occupational Health and Safety Assessment Series (OHSAS), Production Part Approval Process (PPAP), and U.S. Food and Drug Administration (FDA) Critical standards for quality assurance. Founded in 1988, Dynaroll is based in Sylmar, California.


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Most Helpful Customer Reviews

1 of 1 people found the following review helpful By christyna pastore on January 12, 2013
Static Load Capacity: 49Bore Diameter: 0.5Part Number: FR8ZZMax Rotational Speed: 6700Outside Diameter: 1.125Dynamic Load Capacity: 144Bearing Width String: 0.3125 Verified Purchase
We purchased a sears mower over a year ago , and due to sears getting cheaper in their goal to cut costs and quaility .
A Note which I DID let them know in a email which they did repond too ,saying they strive to improve their products and quaility
My dad DID replace the wheel bearing ,with these which are sealed and of a much better quaility!
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