... a=15 AC: Normal contact angle a=25 B: Normal contact angle a=40 7. Bearing Designation: double row angular contact ball bearing OPEN: 3200, 3201, 3202 ... , 2RS: 5203 2RS, 5204 2RS, 5304 2RS, 5205 2RS, 5305 2RS, 5206 2RS, 5306 2RS, 5207 2RS, 5307 2RS, 5208 2RS, 5308 2RS, 5209 2RS, 5309 2RS, 5210 2RS, 5310 2RS, 5211 2RS, 5311 2RS, 5212 2RS, 5312 2RS, 5213 2RS ...