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624-2RS Mini Ball Bearing 4x13x5 Sealed MR624-2RS

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624-2RS Mini Ball Bearing

Key Features

624-2RS is a Miniature Ball Bearing manufactured with Rubber Seals on both sides and is pre-lubricated with grease this allows it to be ready for use upon delivery. Our 620 Series Mini Ball Bearings have a Larger Outer Diameter to use in both Larger Load Capacity Uses and High Speed Applications.

Match Numbers / Interchange Numbers

624-2RS, 624 2RS, 624 RS, 624RS, 624-ZZ, 624 ZZ, 624 Z, 624Z 

Applications / Industries

624-2RS Miniature ball bearings are used in a wide variety of applications such as Electric Fans, Automotives, Engines, Wipers, Throttles, Industrial Hand Pieces, Household Electrical Appliances, Medical Equipment, Robotics, Dental Equipment, High Speed Applications, among others.

What are Miniature Ball Bearings?

A Miniature Ball Bearing is a type of small rolling-element bearing that uses roller balls to separate two “races,” or bearing rings. The key difference between these bearings and many others would be their small size, allowing them to be applied in smaller and tighter lightweight applications. The combination of the roller balls and bearing rings help to reduce surface contact and rotational friction across moving planes to accommodate axial loads.

Miniature Ball bearings help to facilitate motion by distributing loads and reducing friction for applications that have a high-speed requirement, ultimately aiding in extending the working life of your equipment while also effectively saving space in tight applications.

What are Rolling-Element Bearings?

Rolling-element bearings, commonly called rolling bearings, are bearings that carry a load by utilizing “rolling elements” between two concentric, grooved rings called races. The motion of the bearing races allows for the rolling elements to move with very little resistance and with little slide variance.

Some common types of rolling elements include ball, cylindrical, spherical, barrel, needle, spindle, or tapered.

What is the Difference Between Open, Shielded, and Sealed Rolling Bearings? 

The main difference between open and sealed/ shielded bearings is the application of lubrication. The main difference between sealed and shielded bearings is the presence of a protective enclosure.

  • Sealed and shielded bearings are lubricated with grease in the bearing factory. However, a rubber sealed bearing protects the bearing by using a seal that contacts the inner and outer race. This provides superior protection at the cost of operating speed and temperature.
  • Open bearings are meant to be lubricated with light oil, with periodic reapplication of lubrication, based on use.
  • Shielded rolling bearings contain an enclosure that helps to protect the working parts of the bearing from environmental debris that may be introduced and would otherwise reduce the ball bearing speed and lifespan. This metal shield is stamped onto the bearing and only contacts the outer ring, this allows for protection without sacrificing operating speed or temperature.
Online Catalog:
Dimensions & Material
Inner Diameter:
Outer Diameter:
Chrome Steel SAE-52100
Chevron SRI-2 Grease
ID: 4mm x OD: 13mm x W: 5mm
Product Details
Closure Type:
2RS Rubber Sealed Both Sides
Grease RPM Limit:
Oil RPM Limit :
Static Load Rating:
110 lbf
Dynamic Load Rating:
293 lbf
Interchange Numbers:
624-2RS, 624 2RS, 624 RS, 624RS, 624-ZZ, 624 ZZ, 624 Z, 624Z
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624-2RS Mini Ball Bearing 4x13x5 Sealed MR624-2RS

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