Note: 1. Units in this table are mm. 2. ▲ faster than those with only 2:00 φ = size; the band were only Φ80 △ button cylinder card size. 3. M2 for speed ratio φ = 1.46 and 2; M3 only for speed ratio φ = 1.33. 4. Table size code size code for all common installation types. 5. Other sizes can refer to the front and rear flange.