Full Gear Coupling FGC 18A/ FGC 118A - Gear Coupling

Key Specifications

• Nominal / Maximum Torque Capacity: ~ 1,200,000 Nm
• Maximum Speed: ~ 825 RPM
• Shaft Bore / Shaft Diameter Range (hub bore): up to ~ 600 mm (depending on sleeve / bore-sleeve used)
• Outer Diameter (approx.): 1,250 mm

How It Works

The coupling comprises two hubs with external crowned gear-teeth mounted on driving and driven shafts, and two outer sleeves with matching internal spur-teeth. As the driving shaft rotates, torque is transmitted through the meshing teeth to the driven shaft. The crowned-tooth profile and sleeve-gear design allow the coupling to tolerate angular, parallel and axial misalignments — ensuring smooth power transmission even when the shafts are not perfectly aligned. Proper lubrication (grease or oil) is required for smooth functioning and long service life.

Benefits

• Very high torque transmission: Capable of transmitting very large torque — suitable for extremely heavy-duty industrial applications and heavy-load drives.
• Misalignment tolerance: Allows angular, parallel and axial misalignment compensation — reducing stress on shafts, bearings and connected machinery under load or thermal shifts.
• Shock and vibration absorption: Gear-coupling design helps absorb shock loads and damp vibrations under heavy or fluctuating loads.
• Durability and long service life: Constructed with robust steel hubs and sleeves with hardened, precision-machined gear teeth — designed for rugged industrial conditions and heavy loads.
• Suitable for large shafts / heavy machinery: Supports large shaft diameters (up to ~ 600 mm), making it ideal for large-scale industrial drives and heavy equipment.
• Maintenance-friendly (with proper lubrication): Requires regular lubrication; with correct maintenance, offers stable and long-lasting service even in harsh conditions.

Typical Applications

• Steel mills, rolling mills, large metal-industry drives requiring high torque transmission
• Cement plants, crushers, heavy conveyors, bulk material-handling equipment under heavy load
• Large pumps, compressors, blowers, heavy-duty mixers and industrial machinery under continuous or high-load service
• Mining equipment, aggregate-handling plants, dredgers, and other rugged industrial drives with high torque demand and potential shaft misalignment or heavy shock loads
• Any heavy-load industrial machinery requiring robust, flexible power transmission under harsh or variable operating conditions

Selection & Installation Considerations

• Ensure the driven machine’s torque and peak load demand align with coupling’s torque capacity (≈ 1,200,000 Nm for FGC 18A).
• Verify shaft / hub-bore diameters on both driving and driven shafts are compatible (up to ~ 600 mm, or as per bore-sleeve arrangement used).
• Confirm shaft speed (RPM) does not exceed coupling’s rated max (~ 825 RPM) for safe operation and longevity.
• Allow sufficient space for the coupling’s outer diameter (~ 1,250 mm) and ensure coupling fits within mechanical layout and alignment envelope.
• Use appropriate lubrication (grease or oil depending on temperature and load) and schedule regular maintenance to ensure long service life and prevent undue wear or gear-tooth damage.
• Consider expected shaft misalignment (angular, parallel, axial) in installation design and ensure alignment within coupling’s allowable misalignment limits.

Summary

Full Gear Coupling FGC 18A offers a heavy-duty, high-capacity coupling solution capable of transmitting very high torque (≈ 1,200,000 Nm), accommodating large shaft diameters (up to ~ 600 mm), and handling misalignment, shock, and vibration. Its rugged gear-coupling design, high torque capacity, and flexible misalignment tolerance make it ideal for large industrial drives — such as steel mills, cement plants, mining-equipment, heavy conveyors, crushers, pumps/compressors, and other heavy-load machinery. With proper installation, alignment, and regular lubrication & maintenance, FGC 18A delivers reliable, long-lasting power transmission for demanding industrial applications.