Overview
The Falk Rexnord 1040G Flex Hub RSB is a precision-engineered coupling hub designed for industrial power transmission systems. Part of the Falk G Series family, this flex hub features a straight bore style with small through-hole rough stock bore (RSB) configuration. The unit accommodates bore sizes from 2.5 inches to 5.75 inches, making it suitable for a wide range of industrial motor and shaft coupling applications.
Key Features
- G Series straight bore design optimized for gear couplings
- Rough stock bore (RSB) finish for custom machining to application specifications
- 8.25-inch outside barrel diameter for standardized installation
- 4.75-inch hub length (standard configuration)
- Steel construction for durability and load capacity
- Flexible coupling design reduces shock loads and compensates for minor shaft misalignment
Technical Specifications
Key dimensional and functional specifications are verified from manufacturer documentation:
- Outside Barrel Diameter: 8.25 inches
- Hub Length: 4.75 inches
- Bore Style: Straight bore with rough stock (RSB) finish
- Bore Range: 2.5 to 5.75 inches (custom machine-to-order)
- Material: Steel
- Series: Falk G Series
- Coupling Type: Full-flex gear coupling hub
- Part Number: 1203222 (Rexnord product code)
Typical Applications
The 1040G flex hub is commonly used in:
- Industrial motor-to-pump power transmission
- Compressor and blower drive systems
- Conveyor and material handling equipment
- Gearbox input and output shafts
- Large horsepower machinery requiring flexible coupling
- Systems requiring accommodations for parallel and angular misalignment
Compatibility & Replacements
Compatible With
- Falk Lifelign gear coupling systems
- Industrial motor shafts (2.5″ to 5.75″ bore)
- Large-frame industrial gearboxes
- Power transmission equipment requiring G Series hubs
Replaces / Drop-In Replacement For
- Other Falk 1040G flex hub configurations with equivalent bore specifications
- OEM coupling hubs in industrial machinery from the Falk Lifelign product line
Works With
- Falk gear coupling elastomer elements
- Standard industrial shaft coupling systems
- Motor and driven equipment requiring flexible coupling torque transmission
