Full Gear Coupling FGC 8/ FGC 108 - Gear Coupling

Key Specifications

• Maximum Torque Capacity: 49,180 Nm
• Maximum Speed: 3,000 RPM
• Bore Diameter Range (shaft bore): 70 mm – 165 mm
• Approximate Outer Diameter: 380 mm
• Weight (approx.): 165 kg
• Misalignment Compensation: Parallel misalignment up to 1.90 mm, axial float 1.0 mm, angular misalignment per gear mesh up to 1.5°

How It Works

The coupling comprises two hubs with crowned external gear-teeth mounted on the driving and driven shafts. These hubs mesh with two outer sleeves having internal spur gear-teeth. As the driving shaft rotates, torque is transmitted via the meshed teeth to the driven shaft. The crowned-tooth profile and gear-sleeve design allow the coupling to tolerate angular, parallel, and axial misalignments, ensuring smooth and reliable power transmission even when shafts are not perfectly aligned.

Benefits

• High torque and power capacity: Suitable for heavy-duty industrial applications due to strong, hardened gear-tooth design and robust forged steel construction.
• Misalignment tolerance: Accommodates parallel, angular and axial misalignments — reducing stress on shafts and bearings.
• Shock and vibration absorption: Gear coupling design helps damp shock loads and reduces vibration under heavy or fluctuating loads.
• Durability and long service life: Forged-steel hubs and sleeves with hardened and machined gear-teeth ensure reliable performance under demanding conditions.
• Compact and efficient design: Offers high torque transmission in a reasonably compact footprint for its torque class.
• Relatively low maintenance (with proper lubrication): Requires periodic lubrication and inspection to maintain optimal performance and long service life.

Typical Applications

• Rolling mills, steel plants, and heavy-metal industry drives
• Cement plants, crushers, conveyors, and heavy material-handling equipment
• Pumps, compressors, blowers, fans, mixers in heavy industrial environments
• General heavy machinery requiring reliable power transmission under misalignment and varying loads

Selection & Installation Considerations

• Ensure driven machine’s power requirement and peak load match the coupling’s torque capacity.
• Check shaft bore diameters for compatibility (within 70–165 mm for FGC 8).
• Confirm shaft speed does not exceed 3,000 RPM for safe operation.
• Allow space for the coupling’s outer diameter (≈ 380 mm) and consider misalignment tolerances during installation.
• Adopt proper lubrication — grease or oil as per operating temperature and load.
• Consider operating conditions (shock loads, vibration, heavy duty) — coupling design suits heavy load and misalignment environments.

Summary

Full Gear Coupling FGC 8 offers a powerful and resilient solution for heavy-duty industrial power transmission. With a high torque capacity of 49,180 Nm, speed tolerance up to 3,000 RPM, and misalignment accommodation (parallel, axial, angular), it is ideal for demanding applications such as rolling mills, cement plants, conveyors, compressors, pumps, and other heavy machinery. Its rugged construction, high torque rating, and maintenance-friendly design make it a reliable choice for long-term industrial use.