Single row or matched pairs of angular contact ball bearings

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Matched Pair Angular Contact Bearings, also called duplex bearings, are machined as matched sets. The pairs are furnished with the race faces ground to provide preload when installed. To accomplish this, a gap is provided between the inner races or outer race of the pair.

There are three types duplex bearing arrangements commonly used and they are Back to Back, Face to Face and Tandem bearing arrangement.

It is a type of duplex bearing arrangement where the two half are placed so that contact angle lines of the bearing converge inwardly. And these contact angle lines form ‘X’ shape, hence called as “X arrangement”.
In face to face arrangement a gap is provided between outer races and when installed, this gap is closed and producing a preload on the bearings. DF arrangement has lower moment stiffness, so they must be spaced sufficiently to provide resistance to moment load.
They can carry heavy radial loads, combined radial and thrust loads, reversing thrust load.

Bearing Number	Bore Dia	Outer DIa	Width	Size
45 mm x 100 mm x 25 mm NTN 7309B Single row or matched pairs of angular contact ball bearings	TS Assembly	Open	15.1250 in	21.5000 in
45 mm x 100 mm x 25 mm SNR 7309.BG.M Single row or matched pairs of angular contact ball bearings	Round	3.5313 in	703523	Non-Expansion Bearin
45 mm x 100 mm x 25 mm NTN 7309 Single row or matched pairs of angular contact ball bearings	3000 psi	750 fp/min	Maximum of +800	SAE 660 (C932&#
45 mm x 100 mm x 25 mm SNR 7309.BGA Single row or matched pairs of angular contact ball bearings	0.4375 in	Steel	Class 2	053893108810
40 mm x 90 mm x 23 mm NTN 7308BL1G Single row or matched pairs of angular contact ball bearings	Standard Duty	Non-Expansion Bearin	Uncoated	8150 lb
40,000 mm x 90,000 mm x 23,000 mm NTN 7308BG Single row or matched pairs of angular contact ball bearings	2.5000 in	Skwezloc	2.8750 in	.6250 in
40 mm x 90 mm x 23 mm SNR 7308.BA Single row or matched pairs of angular contact ball bearings	PBT Thermoplastic	Two-Bolt Base	1.5000 in	Lubrication Fitting
40 mm x 90 mm x 23 mm NTN 7308B Single row or matched pairs of angular contact ball bearings	22228 CCK/W33	87.313 mm	250 mm	481.95 g
40,000 mm x 90,000 mm x 23,000 mm SNR 7308BGM Single row or matched pairs of angular contact ball bearings	2.0000 in	Lubrication Groove &	ABMA, ISO	Not Rated
40 mm x 90 mm x 23 mm SNR 7308.BGA Single row or matched pairs of angular contact ball bearings	Uncoated	1 mm	19.6 kN	ABEC 9/7 (
40 mm x 90 mm x 23 mm NTN 7308 Single row or matched pairs of angular contact ball bearings	7.6772 in	AV	Galvanized Steel	5.6248 in
35 mm x 80 mm x 21 mm NTN 7307BL1G Single row or matched pairs of angular contact ball bearings	2.4375 in	48600 lbs	Non-Expansion Bearin	Round