The latest generation of hydraulic tie rod cylinders from Parker Hannifin incorporate a number of innovative features designed to minimize machine assembly and maintenance times, resulting in considerably increased productivity levels. Parker’s HMI hydraulic cylinders are now available with four-face spanner flats for simplified maintenance in confined spaces, while specially designed thrust keys can be specified to ensure secure mounting and make machine assembly easier, faster and safer than ever before.
The option of four-face spanner flats on each piston rod end makes each piston rod easier to hold and rotate in confined spaces. As a result, both installation and maintenance are quicker, while the risk of damage to equipment is significantly reduced; just as importantly, this latest development to the proven HMI tie rod cylinders helps to reduce downtime and operating costs.
The design of the thrust key mechanism has also been enhanced for use with Parker’s foot-mounted HMI cylinders. Engineers now have the option of an integrated thrust key, formed as part of the front retainer plate, or a separate key that locates within keyways machined in the foot mounting at the head end of each cylinder and the machine bed. The integrated key is supplied as standard on HMI cylinders between 25mm and 32mm, while the separate unit is intended for use with cylinders of 40mm bore or greater; this version complies with the most recent version of the ISO 6020/2 standard.
All bore sizes of Parker foot mounted cylinders now feature slotted mounting holes in the cap end feet. The mounting holes allow for the dimensional variations that result from tolerance build-up that can occur during cylinder construction, making assembly to the machine simple and fast, and helping to reduce installation time and costs still further.
The latest Parker range of ISO and DIN tie rod cylinders have been developed for applications of up to 210 bar, in bore sizes from 25 to 200mm, with piston rod diameters of 12 to 140mm. Both single and double rod designs are available, with an almost unlimited choice of stroke lengths and a wide variety of options, including cushions and seal materials.