The Simplex RDA308 is a 30-ton, double-acting, general-purpose hydraulic cylinder built for professional lifting, pushing, pulling, and pressing applications that require both powered extension and powered retraction. With a generous 8.13-inch stroke and a rugged steel construction, the RDA308 delivers versatility, control, and consistent performance in industrial, construction, and maintenance environments.
Designed for demanding jobs, its double-acting design provides fast, positive retraction even when the load is not present—ideal for applications where speed, productivity, and precision matter. The cylinder features a hard-chrome plated piston rod for corrosion resistance, a high-strength stop ring for overload protection, and Simplex’s signature reliability for long service life. The 10,000 psi operating pressure and 3/8” NPTF coupler make it compatible with most high-pressure hydraulic pumps and systems.
Maximum Operating Pressure 10,000 psi (700 bar)
Capacity Class 30 tonnage
Maximum Cylinder Capacity Advance 30 short tons
Maximum Cylinder Capacity Retract 12.5 short tons
Capacity 30 imperial tons
Stroke 8.13 in
Collapsed Height 15.75 in
Extended Height 23.75 in
Return Type Double-Acting, Hydraulic Return
Plunger Type Solid
Material Steel
Cylinder Effective Area Advance 6.51 in
Cylinder Effective Area Retract 3 in2
Oil Capacity Required 34.0 in
Ram Bore Diameter 2.87 in
Pressure at Capacity 9250 psi
Weight 40.0 lbs
Hydraulic pressure controls both extension and retraction, giving faster cycle times and more predictable operation.
Ideal when the cylinder must retract under load or in horizontal/angled positions.
With an 8.13-inch stroke, the RDA308 provides meaningful travel for lifting, pushing, and positioning tasks where extra displacement is required.
Delivers 30 tons of force while maintaining a manageable size for field use in industrial and construction environments.
High-strength steel body and piston for long service life.
Chrome-plated piston rod resists scoring and corrosion.
Heavy-duty stop ring prevents over-travel and protects internal components.
Precision internal machining improves sealing, reduces friction, and extends service life.
Double-acting motion is especially useful in applications requiring controlled, repeatable retraction.
Uses industry-standard 3/8” NPTF couplers for compatibility with most 10,000 psi hydraulic pumps, hoses, and manifolds.
As a double-acting cylinder, it needs both extension and retraction hoses—slightly increasing setup complexity.
Must be used with a double-acting (4-way) hydraulic pump to control flow in both directions.
Larger and heavier than comparable single-acting cylinders due to the additional hydraulic chamber.
As with all cylinders, avoid lateral loads. Use alignment plates or saddles for angled work.
The Simplex RDA308 excels in tasks where controlled, repeatable, and powered movement is required:
Lifting and lowering heavy equipment or structural components
Pushing, pulling, or tensioning operations
Pressing and forming in industrial maintenance shops
Steel fabrication and welding fixtures
Bridge and infrastructure repair
Machinery installation, alignment, and heavy assembly
Utility and plant maintenance
Applications requiring the cylinder to operate horizontally or upside down
Use only with a double-acting pump capable of 10,000 psi.
Ensure the cylinder is on a clean, stable, and level surface before loading.
Always avoid side loads—keep the cylinder in line with the force direction.
Inspect hoses, fittings, and couplers before each use.
Keep hands and tools away from the load path, especially during retraction.
Release pressure slowly to maintain control of the load.
Follow Simplex operational guidelines for hydraulic systems and cylinder maintenance.
