Overview
The Kop-Flex CA72740 is a spacer component used in gear coupling assemblies for power transmission applications. Manufactured by Kop-Flex (now part of Regal Rexnord), this Size 3.5 spacer sleeve provides the necessary shaft separation in lubricated gear coupling systems. The SB designation indicates this is a standard spacer bolt configuration, with the 3.25″ dimension referencing the sleeve bore or critical interface dimension.
Key Features
- Size 3.5 gear coupling spacer for medium to heavy-duty power transmission
- SB (Standard Bolt) configuration for reliable assembly and disassembly
- Lubricated design with integrated grease seals and lube access plugs
- AGMA 9002-A86 commercial standard tolerances on finish bores and keyways
- Mating male and female rabbets at center and end flange joints for simplified installation
- Compatible with Series H gear couplings and similar industrial coupling systems
Technical Specifications
Material: Carbon Steel
Component Type: Coupling Spacer
Coupling Size: 3.5
Coupling Style: Gear Coupling (Lubricated)
Bore Dimension: 3.25″ (nominal interface)
Flange Configuration: SB (Exposed Bolt)
Bore/Keyway Tolerance: AGMA 9002-A86 Commercial Standard
Grease Seal: Buna-N O-ring
Finish: As-cast non-critical surfaces; finished bores per AGMA standard
Typical Applications
- Industrial motor and pump coupling assemblies
- Fan and blower drive systems requiring precise shaft separation
- Conveyor and material handling equipment transmission
- Machine tool spindle couplings in manufacturing environments
- Flexible coupling systems where axial misalignment compensation is needed
- Equipment upgrade or replacement where original spacer assembly is worn or damaged
Compatibility & Replacements
Compatible With
- Kop-Flex Series H Gear Couplings (Size 3.5)
- Industrial motor shafts with compatible bore sizes
- Standard industrial power transmission systems using metric or imperial shaft standards
- Equipment requiring lubricated flexible coupling designs
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator or equipment OEM before ordering. The Kop-Flex CA72740 is a specific component designed for particular coupling assemblies; substitution should only occur with documented engineering approval.
Works With
- Kop-Flex gear coupling hubs (Size 3.5)
- Standard industrial lube systems and grease specifications
- AGMA-rated lubrication products for gear couplings
- Equipment designed for Series H coupling assemblies
