1)marking contents:numbers, chinese and english characters, graphs 2)size of characters:adjustable 3)marking depth 0.02-1mm(adjustable, relevant to materials) 4)marking speed 2-5 letters per second according to letter size 5)marking materials:metals or nonmetals with hardness under hrc55 6)marking surface:flat surface (120x80mm, can be change as customer's request) 7)power source ac220v10%50hz 8)pneumatic pressure:0.3-0.7mpa 9)energy consumption:100w(air compressor excluded) 10)repeat precision:0.02-0.05mm 11)work enviroment:regular work environment 12)function introduction: pneumatic marking machine with a rotatable fixture, can mark on workpiece with flat or curved surface, directly mark on the body, base plate, pillar and engine 13)applicable scope:motor industry:mark serial number, manufactural date, name, brand, etc.On pillar, engine and other big and heavy materials 14)major parts:main machine.