Low-friction dynamic air cylinder: The rolling diaphragm creates the perfect seal for friction free cylinders, air proof, non-lubrication and low-friction, This product is supply the power required in push, promote, fasten, convolution, rotation and linearly motion operating conditions. The super cylinder composed of linear ball bearing and heat-treatmented piston rod.This precision elements can be used in conditions with very strictly sensitivity requirements because its high low-friction feature. Features: Excellent leak tightness, gastight, High-low friction, stationary motion, shockproofness; Hypersensitized even under very little pressure change; Low starting pressure and separating force; Non-lubrication High temperature resistance, high tensile, light weight, erotion control and low cost. Maintenance free, longevity of service, multiple type of products. Applied range: Use in constant tension output high precision equipments. Valve actuator, shock-mitigating device, aerodynamic retarder etc. Tension control system, dancer roll and heat-removal control system. Automation control, drag roll high sensitivity drive control. Factory's equipment with gastight and non-greasy dirt requirements. Body and parts: 6061high-strength aluminum alloy;anodized on surface Piston rod : material:20crmnti , thermal treatment-hard chromium -ground finish -hardness:60-62hrc Rubber diaphragm : butadiene nitrile rubber with filamentary fibre;service life:2million times Linear axletree: thk, myt(japan) Type: lcs59-75-s1-p Cylinder diameter: 59mm Working stroke: 75mm Plastic bag, inner box, master carton