Back-to-back duplex arrangement Bearings

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Back-to-back duplex arrangement Bearings (also known as “DB arrangement”, “O arrangement”) is a type of duplex bearing arrangement where the two half are placed so that contact angle lines of the bearing diverge inwardly.

 

Duplex bearings are a set of two bearings  on a shaft with the inner and outer rings clamped together with preload to attain greater axial and radial rigidity. Duplex bearings also used to achieve additional capacity when insufficient space radially for larger bearings.

 

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. When the bearings are installed and clamped axially, the gap is closed producing a preload on the bearings. There are three types duplex bearing arrangements commonly used and they are Back to Back, Face to Face and Tandem bearing arrangement. Bearings that are normally duplexed are angular contact ball bearings and tapered roller bearings.

 

SKF Back-to-back duplex arrangement Bearings

50 mm 1.969 Inch | 50 Mill
Single Row Ball Bear 27 mm

RHP BSB 040072 Back-to-back duplex arrangement Bearings

137 128
3 mm 110x240x84.5

NTN 7014UC Back-to-back duplex arrangement Bearings

90 mm 20 mm
50x90x20 SIGMA

50 mm x 72 mm x 12 mm NSK 50BNR19H Back-to-back duplex arrangement Bearings

1,63 kN 15,875
6,35 4,98 mm

BARDEN XCB71913C.T.P4S Back-to-back duplex arrangement Bearings

35 +0 / 0/039 35.0000
39 +0.025 / 0 Carbon steel shell w

25 mm x 62 mm x 15 mm NSK 25TAC62B Back-to-back duplex arrangement Bearings

1 225.0000
2.100 23128MB

NTN 2LA-HSL917UAD Back-to-back duplex arrangement Bearings

2,1 mm 129 kN
78,8 mm 50x110.8x31

SKF "7211 CD/P4A " Back-to-back duplex arrangement Bearings

42 0,0339 Kg
35x42x16 5000 r/min

NTN 2A-BST LXL/L588 Back-to-back duplex arrangement Bearings

0,29 80
250 135x250x80
1/9