mh series medium-duty hydraulic cylinders

• piston rod - piston rods through 4" diameter have a minimum expected yield of 100,000 psi. they are case hardened to 50 rockwell c to a depth of .030" for damage resistance. they are then hard chrome plated for wear and corrosion resistance. larger diameter rods have an expected minimum yield of 50,000 to 60,000 psi depending on diameter and are hard chrome plated.
• studded rod end - offers much longer fatigue life through elimination of thread relief stress concentration point. standard as style 2 rod end on all rod sizes through 21/2" diameter. studs are pre-torqued and locked in to prevent loosening. they are machined from high tensile steel and the threads rolled.
• tube - the steel tube is honed to an 8 to 16 micro-inch finish for low friction and long seal and piston bearing life.
• tie rod construction - maximum strength is obtained through a pre-stressed tie rod assembly.
• wrench flats - four wrench flats are provided as standard for easy attachment.
• pistons & piston seals - all pistons are machined from a fine grain alloy cast iron. they are threaded directly onto the piston rod, torqued, sealed and locked in place with one or more set screws.  the special piston seal is an endless glass filled teflon material with an o-ring expander. one or more (depending on bore size) bronze filled teflon bearing strips are also employed on this type piston to eliminate metal-to-metal contact.
• static seals - pressure activated o-ring seals are used at rod gland and tube ends.  located to eliminate extrusion and to provide positive leak tight seal.
• rod bearing - high load bearing bronze piloted into the head. located inboard of the seals to insure a well lubricated bearing for the fastest cycling applications. it need not be removed for rod seal replacement.
• rod wiper - the polyurethane wiper is designed to wipe off abrasive dust and contaminants on the retract stroke to insure long life for packings, rod bearing, and piston rod.
• rod seal - the polyurethane rod seal has a unique design which incorporates the optimum sealing properties of a u configuration with the elastomeric properties of a compression type seal.
• rod gland - easily removable for replacement of rod seal and wiper. in most cases it is not necessary to demount or disassemble the cylinder.