Overview
The Boston Gear FC-30 shaft coupling is a three-jaw straight-jaw flexible coupling designed for high-torque power transmission between misaligned rotating shafts. With a bore diameter of 1-3/8 in and coupling overall length of 5-15/32 in, this coupling maintains tight machining tolerances for reliable performance in heavy-duty applications. Manufactured with carbon steel hubs and rated for 3,200 in-lb torque at 3,450 RPM maximum speed, the FC-30 is built for industrial environments.
Key Features
- Flexible design with two hubs and middle assembly that flexes to accommodate shaft misalignment
- Set screw attachment to motor and equipment shafts for quick installation
- 3 in outside diameter with straight jaw profile and keyway bore type
- No lubrication required, not affected by oil, grease, dirt, or moisture
- Suitable for motors, conveyors, agricultural, forestry, mining equipment, and other industrial machinery
Technical Specifications
- Coupling Size: FC30
- Bore Diameter: 1-3/8 in with +0.001/-0.000 in tolerance
- Hub Diameter: 2-3/4 in
- Coupling Overall Length: 5-15/32 in
- Outside Diameter: 3 in
- Maximum Speed: 3,450 RPM
- Rated Torque: 3,200 in-lb
- Hub Material: Carbon Steel
- Shaft Locking: Set Screw
- Keyway Size: 5/16 in Ă— 5/32 in
- Country of Origin: China
Typical Applications
Flexible couplings are used in a broad range of applications, such as in motor vehicles, conveyors, escalators, agricultural, forestry and mining equipment, aeronautics, robotics and space exploration. The FC-30’s straight-jaw design and high torque rating make it well-suited for: heavy-duty pump and motor connections, conveyor drive systems, agricultural equipment shaft transmission, mining machinery, and industrial equipment requiring vibration damping and misalignment accommodation.
Compatibility & Replacements
Compatible With
- Electric motor drives and gearbox input shafts
- Pump and compressor shaft coupling applications
- Conveyor and material handling equipment
- Agricultural and heavy equipment installations
- Any FC30 coupling-series hub system
Replaces / Drop-In Replacement For
- Boston Gear FC30 1-3/8 (manufacturer part number)
- Equivalent straight-jaw flexible couplings rated for 3,200 in-lb torque
- Worn or damaged FC-30 couplings in existing installations
Works With
- FC-30 coupling inserts and elastomer spiders (such as XFCR30 rubber insert)
- Standard set-screw or keyway shaft connection methods
- Motor and equipment shafts with 1-3/8 in bore diameter
- Shaft alignment correction and misalignment compensation applications
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{“label”: “Bore Diameter”, “value”: “1-3/8 in”},
{“label”: “Outside Diameter”, “value”: “3 in”},
{“label”: “Hub Diameter”, “value”: “2-3/4 in”},
{“label”: “Overall Length”, “value”: “5-15/32 in”},
{“label”: “Hub Projection”, “value”: “1-11/16 in”},
{“label”: “Maximum Speed”, “value”: “3,450 RPM”},
{“label”: “Rated Torque”, “value”: “3,200 in-lb”},
{“label”: “Hub Material”, “value”: “Carbon Steel”},
{“label”: “Shaft Locking Type”, “value”: “Set Screw”},
{“label”: “Keyway Size”, “value”: “5/16 in Ă— 5/32 in”},
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{“label”: “Bore Tolerance”, “value”: “+0.001/-0.000 in”},
{“label”: “Country of Origin”, “value”: “China”},
{“label”: “Compatible Models”, “value”: “Boston Gear FC30 1-3/8”}
]
