Ball Bearings

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Ball bearings, or deep-groove bearings, extend the working life of equipment by enabling wheels, pulleys, and other rotating parts to reduce friction and move smoothly. Ball bearings have a series of round balls encased in a housing and support high axial or low-to-moderate radial loads. Axial (thrust) bearings support loads parallel to the axis, such as those exerted by a table supporting a weight.


A ball bearing is a type of rolling-element bearing that uses balls to maintain the separation between the bearing races. The purpose of a ball bearing is to reduce rotational friction and support radial and axial loads. It achieves this by using at least three races to contain the balls and transmit the loads through the balls. In most applications, one race is stationary and the other is attached to the rotating assembly (e.g., a hub or shaft). As one of the bearing races rotates it causes the balls to rotate as well. Because the balls are rolling they have a much lower coefficient of friction than if two flat surfaces were sliding against each other.There are a number of different types of ball bearings, such as miniature, deep groove, and super precision. Miniature Ball Bearings are small bearings with bore sizes between 1 and 10 mm or up to half an inch. Bearings Direct offers a number of miniature ball bearings in both metric and inch sizes that meet ABEC7 precision class.



BEARINGS LIMITED 2905 Ball Bearings

3250 N 0.30 mm
36000 rpm 23000 rpm

BEARINGS LIMITED 22248 MB/C3W33 Ball Bearings

90.0000 mm 6200 rpm
32500 N 23.00 mm


6 mm 9.1
12 mm 1180 mm

BEARINGS LIMITED 32244 Ball Bearings

5120 kN 342.9 mm
245 kN 2.5

BEARINGS LIMITED 32944 Ball Bearings

265.113 mm 0.794 mm
92.075 mm 82.55 mm

BEARINGS LIMITED 23144MB/C3W33 Ball Bearings

1 in 3150 lbf
0.02 in 1750 lbf

BEARINGS LIMITED 22344 KM/C3W33 Ball Bearings

0.93 cm³ 0.3 mm
1 1.12

BEARINGS LIMITED 16044MAC3 Ball Bearings

1 2/5 in 3
1 3/4 in 20 mm, 25 mm

BEARINGS LIMITED 2204/C3 Ball Bearings

2200 rpm 2.00 mm
200 lb 115-37

BEARINGS LIMITED 30204P5 Ball Bearings

50.8 mm 195 kN
79.5 mm 1

BEARINGS LIMITED 32204 Ball Bearings

3250 N 23000 rpm
43000 rpm 22.0000 mm

BEARINGS LIMITED 51104 P5 Ball Bearings

Two Shields 28100 N
9000 rpm 11000 rpm