What sizes do ball bearings come in?

Table 1 – Standard Bearing Sizes

Basic # Bore OD Ball
R12 .7500 1.6250
R14 .8750 1.8750
R16 1.0000 2.0000
R20 1.2500 2.2500

Are ball bearings standard size?

8, no. 6 (June 1921). The dimensions of ball bearings are well standardized. Oddly enough, ball diameters are universally expressed in inches and fractions thereof, while the dimensions of the races are given in either millimeters or English units.

What is a 3 inch ball bearing used for?

This 3-inch diameter chrome steel G100 bearing balls are for use in single-row bearings that support radial loads. These balls have a 3-inch diameter, and are grade G100 for precision relative to sphericity, surface integrity, and size.

How do I calculate bearing size?

How Bearings Are Sized. Bearings are measured by their inner diameter, outer diameter, and width; the size of a bearing is normally listed as such: ID x OD x W. These measurements are normally taken in millimeters, but can be converted to inches.

Why is it called a ball bearing?

A ball bearing is a type of rolling-element bearing that uses balls to maintain the separation between the bearing races. Because the balls are rolling they have a much lower coefficient of friction than if two flat surfaces were sliding against each other.

What is average life of bearing?

Average life –median lives of groups of bearings are averaged–somewhere between 4 and 5 times the L10 life. The constant radial load which a group of bearings can endure for a rating life of 1 million revolutions of the inner ring (stationary load and stationary outer ring).

How much does a ball bearing weigh?

A perfectly spherical iron ball bearing weighs 4.516 grams (the same weight as the chromoly ball bearing from the first homework).

What is the size of a ball bearing?

Ball bearing manufacturers, and providers of ball bearings, offer a range of bearing sizes and dimensions, beginning with all smallest miniature bearings and ending with bearings as large as tens of feet in diameter. They can be spherical, cylindrical, needle-shaped, tapered, and many other shapes.

What is a small ball bearing?

Miniature & small sized ball bearings. Ball bearings are machinery components, which comprise an outer ring, inner ring, balls, retainers, shields and snap rings. Miniature and small-sized ball bearing mean ball bearing, up to 30mm in external diameter.

What are the dimensions of bearings?

All bearings will have an inner diameter (ID), an outside diameter (OD) and width (W). Bearings are sometimes referenced by these dimensions, in that order: ID x OD x W. Measure the ID