R133 Mini Ball Bearing
R133 is an ABEC1 Single Row Inch Sized Miniature Ball Bearing manufactured with Open Closures on both sides and is pre-lubricated with light oil allowing it to be ready for use upon delivery. Made from chrome steel, R133 is an R Series Miniature Ball bearing made to inch sized dimensions and is ideal for applications requiring high running accuracy at high speeds. Our R Series Inch Sized Miniature Ball Bearings are available with rubber seals, metal shields and open closures.
Match Numbers / Interchange Numbers
R133, RI-3332, S3332C, R133S, Ul3006X, R 133
Applications / Industries
R133 Miniature ball bearings are widely used in various industries and everyday applications such as Electric Fans, Automotives, RC Cars, RC Planes, RC Helicopters, Industrial & Medical Hand Pieces, Household Electrical Appliances, Medical Instruments, Surveillance Systems, Plastic Card Printers, Robotics, Pulmonary Assist Devices, Cryogenic Coolers, Flow Meters, Fuel Control, Gyros, Syncros, Yoyo’s, Servos, and many more.
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.
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