Stopper Cylinder Guide

When a moving workpiece moves backward, a stopper cylinder diminishes the chances of a lever injury and also eliminates the possibility of damage by releasing the trapped lever when a pallet abruptly moves backward and collides with the lever. 

Stopper cylinders are commonly available in seven 20 and 30 mm stroke rod end models and 32, 40, and 50 mm bores. The stopper cylinder is a modified cylinder primarily developed for stopping applications in conveyor and machine tool workpiece placement. It features a heavy-duty mounting pad, and the rod/bearing configuration of the cylinder was specially designed to survive side effect filling.

Main Features of a Stopper Cylinder

There are a wide variety of useful features in new stopper cylinders designed for light and medium work keeping and conveyor applications in the manufacturing, logistics, and automotive industries. They have been specially engineered to withstand the forces associated with radial loads that can cause seal leakage and even bent shafts in extreme situations.

There is always an overweight piston rod and bearing diameter in the lightweight and durable configuration of stopper cylinders that maximizes the usable bearing area for impact resistance. For magnetic location detectors, there are also T slot grooves on three sides and the piston rod spring return prevents the load in the event of pressure loss and ensures the installation's protection.

Pneumatic Stopper Cylinders

The pneumatic stopper cylinders consist of actuators that come in linear, rotatable, or slide configuration, valves that may be either proportional or spool form, fieldbus and turnkey systems, air service devices, micro-pneumatics, and cabinets.
Stopper cylinders are designed for stopping items for machining or manufacturing at different points of a conveyor. For applications such as assembly belts, high-bay racking in automated warehouses, and interlinked manufacturing facilities, they are suitable. 

Professional pneumatic stopper cylinders have the equipment and experience to satisfy your automation requirements if you require a basic pneumatic plug, advanced proportional valve, actuator, or fieldbus device.

Working principle and benefits of stopper cylinders

Stopper cylinders with industrial hydraulic shock absorbers are designed for soft shocks. Rebound-free stopping of the load transmitted. For both vertical and horizontal installation, they allow a soft, rebound-free stopping of a transmitted load. 

There are various styles including a variety of shock absorber lever, lone roller, or roller with a piston rod guaranteeing direct stoppage. Stopper cylinders are convenient to use, replace it, even though it is placed on your desktop. Don't expect to keep the stopper cylinder in position for a long time only by using elastomer seals to capture pressure.

Not every factor in stopping performance of a stopper cylinder can be anticipated. The sizing of the actuator and components in the pneumatic circuit is theoretical. 
It is through the examination of the circuit in actual working conditions that the actual performance is obtained. Expect the results to vary. Lower actuator speeds and load ratios will improve stopping performance.

What about cylinder stop tubes?

Similar to stopper cylinders, cylinder stop tubes are essentially collars or tubes of metal that are mounted between the piston and head along the rod of a hydraulic or pneumatic cylinder. They are meant to be used only where there are extra long strokes on a cylinder. They help prevent lateral loads and other strut strength issues, such as folding knives or cylindrical buckling that are often used in horizontal applications. When mass or force retracts the rod and forces it out of its normal direction of travel, a side load occurs. This upward, downward, or lateral bending force may cause rapid wear of the cylinder, and even worsen the wear of the bent rod.

During those longer extensions of the rod, the stop tube can provide side load assistance. Their use reduces the possibility of the piston bottoming out and prevents the cylinder from extending too far. Essentially, this prevents the piston from twisting. In addition, the cylinder limit tube minimizes the possibility of overloading the bearing surface.

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