Samgong SAM-5.5 PE-600DR Air Motor

Samgong SAM-5.5 PE-600DR Pneumatic Air Motor (AM05-0002-0600)

The Samgong SAM-5.5 PE-600DR (Manufacturer Part Number: AM05-0002-0600) is a marine-grade reversible pneumatic piston air motor engineered primarily for shipboard accommodation ladder winches, pilot ladder hoists, gangways, and mooring deck machinery. Designed by Samgong Co., Ltd., this unit delivers high stall torque, positive displacement control, and spark-free operation in hazardous, explosive zones (Zone 1 / Zone 2 marine atmospheres).

Operating at a standard supply pressure of 6.0 kgf/cm² (approx. 0.59 MPa / 85–87 PSI), the SAM-5.5 delivers a nominal rating of 5.5 HP (4.1 kW). Its radial multi-piston architecture provides smooth rotary output, instant start-stop-reverse capability under full mechanical load, and complete immunity to electrical burnout during prolonged stalling.

Model Details:

• Manufacturer: Samgong Co., Ltd. (Republic of Korea)
• Model Code: SAM-5.5 PE-600DR
• Internal / Ordering MPN: AM05-0002-0600
• Design Topology: Multi-Cylinder Radial Piston Pneumatic Motor with Integrated Directional Spool / Speed Control Interface

Technical Specifications

Key Features

1. Intrinsic Ignition Safety: Purely mechanical pneumatic drive eliminating electrical arcing, fully safe for oil, gas, and chemical tanker deck machinery.
2. Continuous Stall Capability: Radial piston design withstands indefinite stall cycles under peak load without structural heat degradation or motor burn-out.
3. Instant Dynamic Reversibility: Bi-directional rotary valving enables smooth shifting between hoist and lower functions on gangway winches under varying tensions.
4. Rugged Marine Metallurgy: Salt-spray and corrosion-resistant ductile iron/cast casing treated for exposed open-deck ocean transit.
5. Standardized Flange & Shaft Machining: Engineered for direct drop-in replacement across global merchant ship accommodation ladder gearboxes.

Compatibility

• Gangway & Accommodation Ladder Winches: Built for OEM installation and retrofit on Samgong, Oceantech, Tsuji, and Manabe Zoki accommodation ladder systems.
• Deck Cranes & Provision Hoists: Compatible with small-capacity deck service davits, life raft deployment auxiliary drives, and store hoists.
• Tanker Deck Machinery: Suitable for closed-loop air winches aboard VLCC, Suezmax, Aframax tankers, LNG/LPG carriers, and bulk carriers.

Part Number Cross-References & Alternates

• Samgong Co., Ltd.: SAM-5.5PE-600DR / SAM-5.5 PE-600 / AM05-0002-0600
• Green Oceantech: OTM-5.5P-600DR (Direct marine interchangeable footprint)
• Japan Air Motor (JAM): JAM 5.5 PE Equivalent series
• IMPA / ISSA Codes: IMPA 6103xx / Marine Pneumatic Winch Drive Motor Series

Applications

• Ship Accommodation Ladder Winches: Hoisting, lowering, and stowing primary crew and pilot boarding ladders safely on port/starboard shell sides.
• Bunker & Provision Handling: Driving pneumatic deck winches during mid-sea bunkering hose management and engine store provisioning.
• Explosive Atmosphere Deck Winches: Hazardous zone operations on oil/chemical tankers where 3-phase electric motors are prohibited by class regulations.
• Offshore Rig Cranes & Trolleys: Safe air-driven auxiliary hoists on marine drilling rigs and FPSOs exposed to heavy seawater wash.

Frequently Asked Questions

What is the primary difference between the Samgong SAM-5.5 PE-600DR and vane-type air motors?

The SAM-5.5 PE-600DR utilizes a multi-cylinder radial piston layout rather than rotating sliding vanes. Radial piston motors produce substantially higher starting torque at low RPMs, maintain steady holding capability without surging, and do not suffer sudden catastrophic vane breakage under heavy deck loads.

Can the SAM-5.5 PE-600DR be operated without an in-line lubricator?

No. While the motor crankcase possesses its own splash-oil reservoir for the mechanical eccentric and connecting assemblies, the incoming compressed air must contain an oil mist (approx. 2 to 4 drops per minute of ISO VG 32 air-tool oil) to lubricate the sliding intake/exhaust distribution valve and piston rings.

What causes the air motor to run slowly or lack lifting torque under load?

Common causes include: restricted exhaust due to a salted or frozen exhaust silencer, insufficient dynamic pressure at the inlet (static pressure drops significantly once the valve opens due to an undersized supply line), or moisture-laden air creating water locks in the lower pistons. Clean the silencer and verify dynamic line pressure reads at least 6.0 kgf/cm² during operation.

Is the Samgong SAM-5.5 PE-600DR fully reversible?

Yes. The motor features dual directional porting. Shifting the control spool valve reverses the air intake and exhaust routes through the central rotary distributor, delivering identical torque in both clockwise and counter-clockwise rotations for controlled hoisting and lowering.

Can this motor directly replace Green Oceantech OTM-5.5P-600DR?

Yes. The Samgong SAM-5.5 PE-600DR and the Oceantech OTM-5.5P-600DR share matching flange bolt circles, shaft diameters, keyway profiles, and port centerlines, serving as interchangeable direct drop-in replacements for standard accommodation ladder winches.