Application: Automatically trim the cured tire vent online, without manual intervention. 1, High precision trimming: The length of tread vent after shaving can be controlled from 0.5 to 1.2mm, and it is 1to2mm for sidewall vents. The vent trimming rate is higher than 99.5%. 2, High efficient trimming: 26to40S per piece of TBR; 16to22S per piece of PCR. 3, High quality of blades: Blades are made of high-technique alloy. The Blades can be sharpened repeatedly up to 8~12 times and able to trim about 30000 pieces of tire after each time of sharpening. Notes: For users with large changes of tires in specifications and models, it is recommended to configure a scanning device, create a database according to the different types of tires, so that to control the blades entry and exit positions by a PLC command servo motor for adopting large range of tire changes. Moreover, co-working with Dial system can achieve multi-machine linkage between as many trimmers.