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SPX Power Team hydraulic technology

RH306 30-ton, single-acting, spring-return center-hole hydraulic cylinder

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RH306 30-ton, single-acting, spring-return center-hole hydraulic cylinder

The Power Team RH306 is a 30-ton, single-acting, spring-return center-hole hydraulic cylinder engineered for tensioning, pulling, and pushing applications where the load path must pass through the piston. It provides a 6.00-inch stroke with a retracted height of approximately 9.75 inches and an extended height of 15.75 inches, offering a compact yet capable form factor for precision load handling. The cylinder features an effective piston area of 6.34 in² and an oil capacity of approximately 38.1 in³. The center-hole diameter is 1-9/32 inches, accommodating tension rods, anchor bolts, or cables for through-loading configurations. The cylinder’s outer diameter measures roughly 4.75 inches, and it operates at a rated system pressure of 10,000 psi, delivering a maximum output force of approximately 30 tons.

Designed for reliability in high-load industrial applications, the RH306 incorporates Power Team’s “Power-Tech” surface treatment to resist corrosion and wear in demanding environments. The single-acting, spring-return configuration allows for controlled hydraulic extension with automatic retraction when pressure is released, minimizing system complexity and reducing setup time. Precision-machined bearing and sealing surfaces ensure consistent concentricity under load, while the center-hole geometry supports accurate axial force transmission during post-tensioning, bolt testing, and structural jacking operations. Proper load alignment and surface preparation are critical, as off-axis loading or side thrust can accelerate wear and affect performance. The RH306’s combination of compact dimensions, high load capacity, and robust construction makes it a versatile and durable component for field service and maintenance operations.

Single Acting Cylinder Center Hole RH603
Product code:
RH306
Capacity:
30-ton
Cylinder Type:
single-acting
Action Type:
spring-return
Stroke Length:
6.00 in

Related Products

  • Use Cases:
    The Power Team RH306 is optimized for operations requiring controlled axial force through a tension rod or cable, such as post-tensioning, cable stressing, bearing or bushing extraction, anchor bolt testing, and structural alignment. Its 1.28 inch through-hole enables use with tensioning studs or pull rods while maintaining precise load symmetry. The compact form factor and 6 inch stroke make it suitable for confined installations in bridge construction, heavy equipment maintenance, and field service operations where high force and portability are required. It is also used in mechanical test rigs, press fixtures, and field calibration setups where direct, concentric load transfer is critical.

    Advantages:
    The RH306’s single-acting, spring-return configuration simplifies hydraulic control circuits by requiring pressure only during extension, reducing hose routing and valve complexity. The “Power-Tech” surface treatment enhances wear and corrosion resistance for extended service life under demanding conditions. Precision-machined internal bearing surfaces maintain alignment and minimize side-load wear during repeated load cycles. 

Specifications

  • Capacity: 30 ton
  • Stroke: 6.00 in
  • Retracted height: 9.75 in
  • Extended height: 15.75 in
  • Effective piston area: 6.34 in²
  • Oil capacity: 38.10 in³
  • Bore size: 2.84 in
  • Piston rod diameter: 3.25 in
  • Outside cylinder diameter: 4.75 in
  • Center-hole diameter (through hole): 1.28 in
  • Collar thread: 4-¾-12 with 1.50 in length
  • Base to port dimension: 1.15 in
  • Operating pressure: up to 10,000 psi
  • Weight: 40 lb
RH Series Cylinder Specifications

 

RH306 Cylinder 

The center-hole design provides operational flexibility for both tension and compression loading without requiring external alignment jigs. Combined with its 10,000 psi pressure rating and rugged steel construction, the RH306 offers high power density, repeatable performance, and low maintenance requirements -ideal for both portable field use and fixed industrial installations.

 

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