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
45,000 mm x 120,000 mm x 29,000 mm NTN 7409 Single row or matched pairs of angular contact ball bearings	Straight	RBEC 1 (ISO Cla	(4) Flange	Brass
40,000 mm x 110,000 mm x 27,000 mm NTN 7408BG Single row or matched pairs of angular contact ball bearings	10000	20	Standard	12
200 mm x 420 mm x 80 mm NTN 7340B Single row or matched pairs of angular contact ball bearings	Solid Pillow Block	Spherical Roller	Bearing Steel	Two-Bolt Base
170,000 mm x 360,000 mm x 72,000 mm NTN 7334BG Single row or matched pairs of angular contact ball bearings	0.7500 in	1.3125 in	Round	4.7500 in
160,000 mm x 340,000 mm x 68,000 mm NTN 7332BG Single row or matched pairs of angular contact ball bearings	6-9/16 to 8 in	3650 RPM	6000	Cast Iron
80 mm x 170 mm x 39 mm NTN 7316 Single row or matched pairs of angular contact ball bearings	Single Concentric Co	4.2400 in	3.1600 in	Spherical Roller
80 mm x 170 mm x 39 mm NTN 7316B Single row or matched pairs of angular contact ball bearings	071345	24000 lb	3.64 in	1-15/16 in
75 mm x 160 mm x 37 mm NTN 7315BL1G/GL Single row or matched pairs of angular contact ball bearings	100 mm	10290 mm²	200 N/mm²	140 N/mm²
170 mm x 360 mm x 72 mm SNR 7334.BG.M Single row or matched pairs of angular contact ball bearings	C3	100mm	4.40 KGS	446
75 mm x 160 mm x 37 mm NTN 7315BL1G Single row or matched pairs of angular contact ball bearings	Four-Bolt Square	5.6250 in	Labyrinth	4-1/2 in
160,000 mm x 340,000 mm x 68,000 mm SNR 7332BGM Single row or matched pairs of angular contact ball bearings	AISI 52100 Steel	Set Screw Collar	5.1181 in	3.0000 in
75 mm x 160 mm x 37 mm NTN 7315 Single row or matched pairs of angular contact ball bearings	0.33	1863 kN	120 mm	170 mm