Overview
Mill-type and tie-rod hydraulic cylinders built to your bore, stroke, mounting and working pressure, for presses, heavy lifting, agricultural machinery and energy equipment.
The cylinder is where hydraulic pressure becomes force and motion. Its bore sets the force, its stroke sets the travel, and the quality of its rod, tube and seals decides how long it runs without leaking or drifting.
We build two constructions. Mill-type cylinders are heavy-duty units with end caps bolted to flanges, made in 160, 180 and 250 bar pressure classes for heavy, continuous duty. Tie-rod cylinders are held together by external tie rods and are made to metric ISO pressure classes of 160 to 200 bar, or to NFPA (inch) ratings of 2500 to 3000 psi, for general machinery and replacement work.
Every cylinder is sized to its job: required force and speed, stroke, mounting style, port type and position, fluid and operating temperature. If you are replacing a worn or imported cylinder, send us its dimensions or the cylinder itself and we will build one that fits the same installation.
How it works
Models
Questions
How do I calculate the bore for the force I need?
Force equals pressure times piston area. To find the bore, use D = √(4F / πP), with D in mm, F in newtons and P in MPa (1 MPa = 10 bar).
Example: at 250 bar (25 MPa), a 200 mm bore gives about 785 kN, roughly 80 t. Choose a standard bore above the calculated value and leave a margin for friction and pressure losses. Our cylinder calculator and our engineers can check the result.
What is the difference between mill-type and tie-rod cylinders?
A tie-rod cylinder is held together by steel rods running outside the tube between the two end caps. It is compact, standardised and easy to service, and suits general machinery at moderate pressures. We make them to metric ISO classes of 160–200 bar and to NFPA ratings of 2500–3000 psi.
A mill-type cylinder has heavy end caps bolted to flanges on the tube, with no external tie rods. It is built for heavy, continuous duty and shock loads. We make them in 160, 180 and 250 bar classes.
What details should I send when ordering a cylinder?
Bore, rod diameter and stroke; working pressure; mounting style at both ends; port type, size and position; the hydraulic fluid and operating temperature; and the speed and load the cylinder must handle.
If you are replacing an existing cylinder, its measurements, its nameplate or the cylinder itself is the fastest route to an exact match.
Tell us what you need to press.
An engineer will study your request and get back to you with a proposal.