Dual bearing mounting face to face, back to back, which faces the surface? Which side is the back? I'm dizzy, thank you to answer! 1. Such call-way bearing freshwater 6204, only bearing contact angle, single row tapered bearings only. 2. Face to face all kinds of call-back big table face similar or contact face similar small or contact BB (Back to back) Mounting FF (Face to face) Mounting Indirect Mounting Direct Mounting "O" Mounting "X" Mounting non-separable angular contact ball bearings Single row angular contact ball bearing rings bearing such a channel lock port, so can not separate the two sets of rings. Press contact angle is divided into three: ① contact angle α = 40 ° Greeting universal bearings for bear large axial load; ② contact angle α = 25 °, used for precision spindle bearings; ③ contact angle α = 15 °, and more for larger size precision bearings. Longgang way bearing 6204 | Shun GF bearing Electrical (certified) | bearings provided by Shenzhen-GF bearing Electrical Co., Ltd.. Shenzhen City, Guangdong Development bearing Electrical Co., Ltd. (www.sgfzc.com) (www.sgfzc.com) is Shenzhen, the other leaders over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum to meet customer needs. In bearing Electrical leadership Shun GF staff warmly welcome all inquiries negotiations to create Shun GF bearing Electrical better future.