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
105 mm x 190 mm x 36 mm NTN 7221B Single row or matched pairs of angular contact ball bearings	Standard	6000	15mm	Plastic
110 mm x 200 mm x 38 mm SNR 7222.BG.M Single row or matched pairs of angular contact ball bearings	0.1	h8	50 mm	H7
105 mm x 190 mm x 36 mm NTN 7221BL1G Single row or matched pairs of angular contact ball bearings	1310 kgf	91 mm to 103 mm	Two-Bolt Base	1.3110 in
105 mm x 190 mm x 36 mm NTN 7221 Single row or matched pairs of angular contact ball bearings	Two-Bolt Base	710372	Round	35 mm
100 mm x 180 mm x 34 mm NTN 7220BL1G Single row or matched pairs of angular contact ball bearings	0.7500 in	2300 lbs	Black Oxide	1.3750 in
100,000 mm x 180,000 mm x 34,000 mm NTN 7220BG Single row or matched pairs of angular contact ball bearings	100,000 mm x 180,000 mm x 34,000 mm	-	-	-
100 mm x 180 mm x 34 mm NTN 7220 Single row or matched pairs of angular contact ball bearings	Set Screw	5.5625 in	Lubrication Fitting	Round
100 mm x 180 mm x 34 mm NTN 7220B Single row or matched pairs of angular contact ball bearings	Two Metal Shields	Steel	mr105-2z-zen	10mm
95 mm x 170 mm x 32 mm NTN 7219BL1G Single row or matched pairs of angular contact ball bearings	Class 2	053893528199	Steel	6.0000 in
100 mm x 180 mm x 34 mm SNR 7220.BG.M Single row or matched pairs of angular contact ball bearings	Cast Iron	Lubrication Fitting	4.3750 in	Eccentric Collar
95,000 mm x 170,000 mm x 32,000 mm NTN 7219BG Single row or matched pairs of angular contact ball bearings	5.2500 in	Solid Flange Mount	Max 250°	2.8281 in
95 mm x 170 mm x 32 mm NTN 7219B Single row or matched pairs of angular contact ball bearings	52100 Steel/Bla	1.5625 in	Lubrication Fitting	Uncoated