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
25 mm x 62 mm x 17 mm SNR 7305 Single row or matched pairs of angular contact ball bearings	1-35/64 in	Non-Expansion Bearin	Thermoplastic	Round
20,000 mm x 52,000 mm x 15,000 mm NTN 7304BG Single row or matched pairs of angular contact ball bearings	20,000 mm x 52,000 mm x 15,000 mm	-	-	-
20 mm x 52 mm x 15 mm NTN 7304B Single row or matched pairs of angular contact ball bearings	Dry 0.40;Period	15 N/mm2;S	75 mm	Bronze with Embedded
20 mm x 52 mm x 15 mm NTN 7304 Single row or matched pairs of angular contact ball bearings	1.6250 in	30 mm	Uncoated	Skwezloc Collar
30 mm x 62 mm x 16 mm SNR 7206.BGA Single row or matched pairs of angular contact ball bearings	5/8-11	117.5 mm	101.6 mm	2.2520 in
17 mm x 47 mm x 14 mm NTN 7303B Single row or matched pairs of angular contact ball bearings	7316577416155	2.9375 in	Set Screw	Cast Iron
17,000 mm x 47,000 mm x 14,000 mm NTN 7303BG Single row or matched pairs of angular contact ball bearings	81.5	200mm	3450	78
20 mm x 52 mm x 15 mm SNR 7304.BGA Single row or matched pairs of angular contact ball bearings	Hardened Alloy Steel	3.5630 in	2.933-12	Right Hand
17 mm x 47 mm x 14 mm NTN 7303 Single row or matched pairs of angular contact ball bearings	Round	3.1250 in	Felt Seal	3.1875 in
15 mm x 42 mm x 13 mm NTN 7302B Single row or matched pairs of angular contact ball bearings	0.8750 in	9200 lbf	Separable	2800 RPM
15,000 mm x 42,000 mm x 13,000 mm NTN 7302BG Single row or matched pairs of angular contact ball bearings	117.5 mm	Tapped Base	Max 250°	47.60 mm
12 mm x 37 mm x 12 mm NTN 7301BG Single row or matched pairs of angular contact ball bearings	-22 to 400°F	Labyrinth	12000 fpm	Exceptional Bearing