Bearing 7309BM/P5 BDB
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Bearing 7309BM/P5 BDB – what does BDB mean?
Whether it’s a SKF or NSK brand, or from a different manufacturer, it definitely makes a difference
B~~Pressure angle 36° (A~26//C~46) DB~~~Back-to-back (DA~Face-to-face//DC~In sequence~)
B~~Pressure angle 36° (A~26//C~46) DB~~~Back-to-back (DA~Face-to-face//DC~In sequence~)
DBs are back-to-back; I’m not sure what the first B in BDB means
A unified reply to the previous inquiries: The bearing is 7309BM/P5 BDB. The first ‘B’ indicates a contact angle of 40 degrees; the cage is made of yellow brass; the P5 tolerance grade corresponds to level 5 as specified by the standards, and the clearance corresponds to level 0 as specified by the standards. The value ‘0’ isn’t indicated here. I’m not sure what the first ‘B’ in BDB means – ‘DB’ stands for back-to-back installation, and the bearing is manufactured by Harbin Bearing
The first B indicates that this type of angular contact bearing has a larger contact angle, allowing it to withstand greater axial forces!
B – Angular contact bearing, contact angle of 40 degrees, example: 7210B