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CHYD-R250 Hydraulic Cylinders
Model code CHYD-R250 formerly RHCP25
CHYD-R250 — Hydraulic Cylinders. Hydraulic cylinders create force in a single direction through a single stroke. That makes them the workhorse of heavy equipment — construction machinery, lifting equipment and manufacturing plant — where a compact component has to produce a large, controlled force.
Pressurised fluid, typically oil, is what provides the power. The cylinder consists of a cylinder barrel in which the piston rod moves a piston back and forth, with pressure acting on the piston area to produce force.
Where hydraulic cylinders are used
- Construction equipment — excavators, loaders, dozers and attachments.
- Lifting and positioning equipment, including scissor lifts and tail lifts.
- Manufacturing machinery needing a linear clamp, press or eject stroke.
- Agricultural and municipal equipment.
- Gate, door and hatch actuation on water and process plant.
How the force is calculated
Force is pressure multiplied by the effective piston area. Two consequences follow, and both matter when specifying:
- Bore size sets the force at a given pressure. Doubling the diameter roughly quadruples the force.
- Rod diameter sets the retract force, because the rod reduces the effective area on the retract side.
Stroke length, mounting style, rod end thread and port positions are then specified around the machine, not the other way round.
What we need to quote a cylinder
- Bore and rod diameter (or the force required at your working pressure).
- Stroke length.
- Working and peak pressure.
- Mounting — clevis, flange, foot or trunnion, with dimensions if a direct replacement.
- Rod end — thread, eye or clevis.
- Environment — indoor plant, outdoor construction, coastal or washdown, which drives seal and coating selection.
Maintenance points that prevent most failures
- Keep the fluid clean; contamination is the most common cause of seal and barrel wear.
- Check rod seals for weeping early — a leaking rod seal lets dirt in as well as oil out.
- Protect the rod from impact and grit; a scored rod destroys the seal it passes through.
- Confirm the breather or vent is clear on single-acting cylinders.
- Hold spare seal kits for critical machines rather than a complete spare cylinder.
Frequently asked questions
Frequently asked questions
Can you supply a cylinder to match an existing machine?
Yes, if you can give us the mounting dimensions and stroke. A direct replacement is normally specified from the machine drawing or the old cylinder.
Single acting or double acting?
A single-acting cylinder produces force in one direction and returns by load or spring; a double-acting cylinder is powered in both directions. Tell us the motion required and we will confirm which you need.
What pressure can the cylinder work at?
It depends on the model and bore. Give us your working and peak pressure and we will confirm a suitable cylinder, rather than quote a single figure that would be wrong for half the range.
Do you supply seal kits?
Yes — seal kits are available as service items, and we would recommend holding one per critical machine.
Are these suitable for outdoor and coastal use?
Specify the environment when enquiring: rod coating, seal material and paint finish are selected for it.
From the catalogue
All products
Related products
Need help specifying CHYD-R250 hydraulic cylinders?
Send us the pump make, model and serial number and we will come back to you.