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
60 mm x 110 mm x 22 mm SNR 7212.BA Single row or matched pairs of angular contact ball bearings	60 mm x 110 mm x 22 mm	-	-	-
60 mm x 110 mm x 22 mm NTN 7212B Single row or matched pairs of angular contact ball bearings	883450058407	0.4375 in	2.9000 in	3.6250 in
60 mm x 110 mm x 22 mm SNR 7212.BG.M Single row or matched pairs of angular contact ball bearings	Click here	Gray Painted	VS-323	0.6250 in
60 mm x 110 mm x 22 mm NTN 7212 Single row or matched pairs of angular contact ball bearings	-60 to +500 &de	2.8125 in	Requires Lubrication	115400 lbf
55 mm x 100 mm x 21 mm NTN 7211BL1G Single row or matched pairs of angular contact ball bearings	Round	45 mm	75 mm	190 mm
60 mm x 110 mm x 22 mm SNR 7212.BGA Single row or matched pairs of angular contact ball bearings	4 Inch	0.938 Inch	In Stock	Standard
55 mm x 100 mm x 21 mm NTN 7211BL1 Single row or matched pairs of angular contact ball bearings	Round	662327118280	Four-Bolt Base	Cast Iron
55,000 mm x 100,000 mm x 21,000 mm NTN 7211BG Single row or matched pairs of angular contact ball bearings	3500 RPM	Contact Seal	126283	Cast Iron
55 mm x 100 mm x 21 mm SNR 7211.BA Single row or matched pairs of angular contact ball bearings	Brass Cage	180 mm	85 mm	60 mm
55 mm x 100 mm x 21 mm NTN 7211B Single row or matched pairs of angular contact ball bearings	50mm	Non-Contact Seal	7mm	9500
55 mm x 100 mm x 21 mm NTN 7211 Single row or matched pairs of angular contact ball bearings	Standard Precision	053893806136	0.37 lbs	12.7933 in
55 mm x 100 mm x 21 mm SNR 7211.BG.M Single row or matched pairs of angular contact ball bearings	053893026312	0.866 in	0.8660 in	38700 lbf, 22200 lbf