Push/Pull Cylinders
Standard Features and Concepts
Standard Features Special wipers keep chips and contaminants out.
Chromed and hardened alloy steel plungers run longer with less wear and drag than other brands. Vent port with bronze filter gives the cylinder a place to "breathe" and helps keep chips from drawing past wipers. (Can be used for a breather line or used as a Double Acting Unclamp port.) BHC™ (Black Hard Coating) on the cylinder bodies helps prevent scoring and scratching, especially in the event of high side or "kick" loads, which promote excessive scoring in many other brands. Proprietary seal designs reduce leakage and increase seal life for longer lasting, more dependable cylinders.
G-1
What is the intended application of Push-Pull devices? Use Push-Pull clamps for actuating remote mechanisms, pulling on clamp plates, or often with removable "C" washers as a manual assembly, automatically activated pull clamp. I want a non-rotating model, how do I get a guided pull cylinder? See standard swing clamp pages (Section C). Order the required swing clamp size assembled in the straight guided track. This will get you the intended pull cylinder with a guided straight-line pull, or you may add an external guide to many applications. I need to draw a wedge, but I have had problems unlocking hydraulic wedge mechanisms. How do I solve this problem? The best solution is to draw the wedge using a double acting push/pull cylinder. This will give you a push capacity of approximately 2:1 providing adequate force to overcome the mechanical advantage involved in the wedging action. I want to make my part locators disappear. How can I do this? You can mount them on either single or double acting push/pull cylinders. Always use double acting if there will be a guide bushing or other frictional mechanism, or if positive extension is required in a short time. When extended, your locators are in place to help position your part. After location, just actuate your pull cylinders and draw the locator out of the way.
I need to crowd a part against the fixed stops then retract the spring plungers. Do you have anything to do this? Yes, you may use single acting pull cylinders as stock crowders. Hold your part in place, then draw the cylinder away for machining. This can often be done with a single hydraulic clamping circuit making your controls very simple. Be sure to use a hardened contact point on your pull cylinder when using it as a stock crowder. I notice that you don’t have a double acting block pull cylinder. Why not? Double acting block pull cylinders are the same as double acting block cylinders. Please order a simple double acting block cylinder for this function. Other models are not readily available in their exact configuration under different numbers.
I need to manually index a swing clamp. The rotation required to clear the part varies from part-to-part. I could also use a little extra stroke. Can you help? Maybe. If the contact point location on the part is not critical, you can use a single acting pull cylinder as a manually indexed swing clamp. Remember that the arm is not guided as it travels down. The extra stroke comes from your operator swinging the cylinder "flat" in the unclamp position, it then has the full cylinder stroke to pull the arm against the workpiece. Please avoid using double acting cylinders as they are difficult to swing when pressurized in the up position.
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