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
35,000 mm x 80,000 mm x 21,000 mm NTN 7307BG Single row or matched pairs of angular contact ball bearings	SAE J-437, ASTM A-68	3 ft	Steel	ASTM, SAE
35,000 mm x 80,000 mm x 21,000 mm SNR 7307BA Single row or matched pairs of angular contact ball bearings	Spherical Roller	1400 RPM	Contact/Lip	2000
35 mm x 80 mm x 21 mm NTN 7307B Single row or matched pairs of angular contact ball bearings	190 mm	320 mm	268 mm	2300 r/min
35 mm x 80 mm x 21 mm NTN 7307 Single row or matched pairs of angular contact ball bearings	10 mm	Without Snap Ring	C3	35 mm
30 mm x 72 mm x 19 mm NTN 7306BL1G Single row or matched pairs of angular contact ball bearings	392 °F	1330 mm	Oil Groove and Holes	Tapered 1:12
35 mm x 80 mm x 21 mm SNR 7307.BGA Single row or matched pairs of angular contact ball bearings	1.5 mm	24 kN	90 mm	Single Seal
25 mm x 62 mm x 17 mm NTN 7305BL1G Single row or matched pairs of angular contact ball bearings	N 068	1:12	Steel	PL 68
30 mm x 72 mm x 19 mm NTN 7306 Single row or matched pairs of angular contact ball bearings	102 mm	Side Mount	35 mm	Click here
30,000 mm x 72,000 mm x 19,000 mm NTN 7306BG Single row or matched pairs of angular contact ball bearings	23 mm	Steel	23400 lbf	1.5 mm
30 mm x 72 mm x 19 mm NTN 7306B Single row or matched pairs of angular contact ball bearings	Lock Plate	87045	Bearing Puller	20 ton
30 mm x 72 mm x 19 mm SNR 7306.BGA Single row or matched pairs of angular contact ball bearings	Contact Seal	USDA Approved	Stainless Steel	1.2500 in
25,000 mm x 62,000 mm x 17,000 mm NTN 7305BG Single row or matched pairs of angular contact ball bearings	10.2500 in	.6250 in	Cast Iron	4.1250 in