RAR306 309 kN Capacity, 150 mm Stroke, Double-Acting, Aluminum Hydraulic Cylinder

Enerpac RAR306 is a lightweight, double-acting aluminum hydraulic cylinder designed for high-force pushing and pulling in confined spaces, ideal for industrial maintenance, construction, and tensioning tasks. With a 34.2-ton (309 kN) advance capacity and 150 mm stroke, this model offers rapid hydraulic retraction independent of hose length, operating at up to 10,000 psi with an integral stop ring for over-travel protection, composite bearings for side-load resistance, and a hard anodized finish for superior corrosion resistance and durability in harsh environments.

• Product Overview
  • Name: Enerpac RAR306 Double-Acting Aluminum Hydraulic Cylinder
  • Type: Double-acting, hydraulic return solid plunger cylinder
  • Primary Applications: Pushing, pulling, tensioning, and maintenance in versatile industrial setups
  • Force Output: 34.2 tons (309 kN) advance capacity; 18.8 tons (167 kN) retract capacity
  • Stroke: 150 mm (5.91 in)
  • Retraction Mechanism: Hydraulic return
  • Operating Pressure: Maximum 10,000 psi (700 bar)
  • Collapsed Height: 301 mm (11.85 in)
• Technical Specifications
  • Capacity (Advance): 34.2 tons (309 kN)
  • Capacity (Retract): 18.8 tons (167 kN)
  • Maximum Operating Pressure: 10,000 psi (700 bar)
  • Stroke: 150 mm (5.91 in)
  • Collapsed Height (A): 301 mm (11.85 in)
  • Extended Height (B): 451 mm (17.76 in)
  • Outside Diameter (D): 125 mm (4.92 in)
  • Bore Diameter (E): 75 mm (2.95 in)
  • Plunger Diameter (F): 50 mm (1.97 in)
  • Effective Area (Advance): 44.2 cm² (6.85 in²)
  • Effective Area (Retract): 24.5 cm² (3.80 in²)
  • Oil Capacity (Advance): 663 cm³ (40.45 in³)
  • Oil Capacity (Retract): 366 cm³ (22.35 in³)
  • Weight: 10.4 kg (22.9 lbs)
  • Base to Advance Port (H): 30 mm (1.19 in)
  • Top to Retract Port (I): 55 mm (2.17 in)
  • Saddle Diameter (J): 40 mm (1.58 in)
  • Saddle Protrusion from Plunger (K): 3 mm (0.12 in)
  • Bolt Circle (U): 105 mm (4.13 in)
  • Thread (V): M6
  • Thread Depth (Z): 12 mm (0.47 in)
  • Series: RAR Series Double-Acting Aluminum Cylinders
• Key Features
  • Double-acting operation for fast, controlled retraction regardless of hose length
  • Lightweight aluminum body reduces weight by up to 40% compared to steel equivalents
  • Hard anodized finish and chrome-plated plunger for corrosion resistance and smooth operation
  • Integral stop ring prevents plunger over-extension and handles full capacity
  • Composite bearings provide high side-load resistance (up to 10%)
  • Grooved and threaded plunger ends for easy attachment of tilt saddles or accessories
  • Built-in relief valve safeguards against over-pressurization
  • Steel base plate and saddle protect against load damage
  • Includes CR-400 couplers and dust caps for immediate use