S40 Pneumatic grinderapplying:S40 type pneumatic grinder is one of the mechanized hand tools,Website:http://www.nbydtools.com, instead of filing for mould manufacturing. As fitted with different shapes of grinding wheel, grinding head, can repair all kinds of concave cambered surface of mechanical assembly surface grinding. As with cloth wheel instead of grinding wheel polishing operation can be performed. In shipbuilding, machinery vehicles and other industries widely used.technical data: Max Grinder Size :40mm Spring Collet Size:6mm Free Speed : ≥17500r/min Air Hose Size: Φ8mm Overall  Length:180mm Net Weight:0.75kg