ParkerHeavy Duty Tie Rod Hydraulic Cylinder, 3-1/4 in Bore, 2 in Stroke, Double Rod, 3000 psi, Trunnion Mount

Product Description

What this part is

A Parker Series 2H heavy-duty hydraulic cylinder, 3-1/4 in bore with a 2 in stroke, built as a double-rod unit. A piston rod emerges from both ends, so the cylinder drives two things at once, or drives one thing while carrying a switch actuator, stop or feedback device on the opposite rod. Series 2H is Parker’s NFPA tie-rod industrial line, rated to 3000 psi, with a jewel-style rod gland and square heads pulled up on four tie rods.

Decoding the order code

Parker cylinder codes read bore first, build in the middle, stroke last: 03.25 – KJTC2HLTS13A19A – 2.000.

03.25: 3-1/4 in (3.25 in) bore.

K: double rod, a rod out of both ends.

TC: trunnion mounting on the cap end.

2H: Series 2H heavy-duty hydraulic, 3000 psi rated.

S13A and 19A: Parker special-modification codes recorded against this build.

2.000: 2 in stroke.

The standard rod diameter Parker publishes for a 3-1/4 in bore Series 2H is 1-3/8 in.

What these specs mean in practice

A short stroke on a large bore is a force job rather than a motion job. At 3000 psi a 3.25 in bore develops roughly 24,900 lbf on the full piston face, and with 2 in of travel this is the sort of cylinder used for clamping, pressing, and gate and knife actuation.

Double rod changes the force balance. Both sides of the piston lose the same rod area, so extend and retract forces are equal, which is why double-rod cylinders are chosen for balanced shuttle motions. The second rod also travels behind the cylinder and takes up length there.

Trunnion mounting takes the load in shear on a centreline pivot and lets the cylinder swing. Trunnions are not designed for stroke-end shock through the pins.

Tie-rod construction makes the cylinder rebuildable: seals, gland and rod are serviceable items, and Parker publishes seal kits by bore and series.

Published specifications

Type: heavy-duty tie-rod hydraulic cylinder, Parker Series 2H.

Bore: 3-1/4 in (3.25 in).

Stroke: 2 in.

Rod arrangement: double rod, both ends.

Standard rod diameter for this bore and series: 1-3/8 in.

Rated operating pressure: 3000 psi.

Mounting: cap-end trunnion.

Construction: four tie rods, jewel-style rod gland, rebuildable.

Standard: NFPA interchangeable envelope.

Quantity and configuration

One cylinder, used take-out. No mounting pins, brackets, seal kit, switches or fittings are included.

Interchange guidance

Series 2H shares the NFPA envelope, so mounting dimensions cross to other NFPA 3000 psi tie-rod cylinders of the same bore, stroke and mount. Bore, rod diameter, mount style and the double-rod feature all have to match before a cylinder is a genuine replacement. Parker Series 3H is the higher-pressure family in the same envelope. A single-rod cylinder of the same bore and stroke is a related product rather than a substitute.