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Leaders in manufacturing Pneumatic and Hydraulic Cylinders

Greenco Mfg/Duramaster Cylinders was founded in 1970 and has been continuously engaged in the design and manufacture of quality industrial pneumatic products for over 55 years.
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Greenco/Duramaster consists of several related divisions that make use of a common manufacturing facility, machine shop and corporate headquarters, all based in Tampa, FL.
Looking for a pneumatic cylinder with air piston or an actuator?
​At Duramaster Cylinders we offer high quality NFPA interchangeable rod cylinders, tie rod cylinders, air over oil tanks, hydraulic cylinders. Options of a single acting pneumatic cylinder, double acting pneumatic cylinder, hydraulic cylinders, and custom multi-stage configurations. Can customize the units to different specifications, consult factory for additional information. 

​Duramaster Tie Rod Cylinders Key Features and Options

  • Rod Bushing – Bronze Bearing. Long style 660 bronze bushing provides maximum wear resistance for increased durability and lowest friction.
  • Cylinder Tube – 35,000-PSI aluminum alloy. I.D. of tube is hard anodic coated. 60 RC on I.D.
  • Head Caps & End Caps - 6061-T6 aluminum alloy extrusion and black anodized for corrosion resistance. Head caps are machined from 6061-T6 aluminum for high strength and low weight. Then they are black anodized to resist corrosion and oxidation.
  • Bushing Retainer Plate – Anodized aluminum. Removable with standard allen wrenches (hex keys). This allows the bushing to be replaced easily, without disassembling the cylinder.
  • Piston - 6061-T6 aluminum alloy.
  • Piston Rod - C1050 steel alloy 100,000-psi minimum yield. Ground & polished with a hard chrome finish 68-70 RC. Stainless Steel Available.
  • Tie Rods & Nuts - Stress-proof steel. Plated. Recessed Nuts Plated. Stainless Steel Available.
  • Wear Band - Specially compounded nylon with high strength reinforced materials and impregnated with a special lubricant. Graphite impregnated wear bands on the piston are extra wide for added support.
  • Tube End Seals – Reinforced fiber material.
  • Piston Seals – Lip type, wear-resistant nitrile.
  • Rod Wiper - Double lip wiper/seal ring - high quality polyurethane.
  • Cushion Seals - Floating nitrile - resists external misalignment. Floating cushions reduce the speed of the piston as it approaches the end of stroke, but they do not affect the speed of the piston in the opposite direction.
Duramaster Cylinder, a division of Greenco MFG Corp., is a family-owned business that is based in Tampa, Florida. The generations of family ownership have over time enhanced and continue to focus on the quality of the products and services. Having that personal relationship as if it were still running like their forefather had done before them.
President Joe Green:
"We believe that each individual employee is important to the overall success of the company, and, as a small company, consider our fellow employees to be much like a big family that stands together and helps each other as circumstances require."​

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