Ball Bearings

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 two 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.

Ball bearings tend to have lower load capacity for their size than other kinds of rolling-element bearings due to the smaller contact area between the balls and races. However, they can tolerate some misalignment of the inner and outer races.

Bearing Number	Bore Dia	Outer DIa	Width	Size
NSK BA150-4E DB Ball Bearings	2.7500 in	053893073835	1.6250 in	5.23 lbs
NSK BT260-51aE DB Ball Bearings	7/8 in	Rubber	-	-
NSK B610-7 Ball Bearings	1.3750 in	4-59/64 in	2.4375 in	4-1/64 in
NSK BA320-1 DF Ball Bearings	20 mm	1444 lb	3.5313 in	Felt Seal
NSK 7984BX DB Ball Bearings	75 mm	11600 kgf	184.1 mm	7840 kgf
NSK BA380-1 DB Ball Bearings	3.2500 in	3.7500 in	13.6300 in	Expansion Bearing (Floating)
NSK BT220-3 DF Ball Bearings	1.2500 in	4410 lbf	PBT Thermoplastic	2540 lbf
NSK BA225-1 DB Ball Bearings	1.5000 in	2150 lbf	5.6719 in	1080 lbf
NSK 7936AAX DF Ball Bearings	2.9375 in	Exceptional Bearing Protection, Rotating Applications, Pumps, Gearboxes, Motors, Energy Efficient Applications, Primary Metals Industry, Steel Industry, Aluminum Industry, Pulp and Paper Industry, Che	Labyrinth	3926904590.US
NSK 7936AAX DB Ball Bearings	1.1250 in	4410 lbf	PBT Thermoplastic	2540 lbf
NSK 6948X1 Ball Bearings	Two-Bolt Base	1.1250 in	0.7500 in	1.1875 in
NSK 7984BX DF Ball Bearings	Two-Bolt Base	67 mm	25 mm	1430 kgf