Overview
The Martin 3020 Taper Lock Bushing is a precision-engineered shaft clamping component designed for industrial power transmission applications. This 2-3/8 inch bore model delivers consistent, high-torque clamping force through its 8-degree tapered split-bushing design. Built from steel and manufactured to industry standards, the Martin 3020 provides a drop-in replacement or upgrade path for equipment using taper-lock hubs on sprockets, sheaves, pulleys, and couplings.
Key Features
- 8-degree tapered design ensures excellent clamping force and minimal slippage
- Split-bushing construction allows easy installation and removal without disassembly
- 24,000 in-lb torque capacity suitable for heavy-duty power transmission
- Flush-mounted design with no protruding parts—compact and safe
- Two-bolt installation using standard 5/8-11 x 1-1/4 inch cap screws
- 1/2 x 1/4 inch keyway accommodates standard shaft keys
Technical Specifications
- Bore Size: 2-3/8 inch
- Hub Diameter: 5-5/8 inch
- Barrel Diameter: 4-1/4 inch
- Taper Angle: 8 degrees
- Overall Length: 2 inches
- Bolt Circle Diameter: 4 inches
- Bolt Holes: 2 (5/8-11 x 1-1/4 inch screws)
- Keyway: 1/2 x 1/4 inch
- Torque Rating: 24,000 in-lb
- Material: Steel
Typical Applications
- Variable frequency drive (VFD) and direct-drive motor systems
- Conveyor and belt-drive applications requiring reliable clamping
- Pump and compressor drive trains
- Industrial machinery with taper-bushed sprockets and sheaves
- Fan and blower drives in HVAC and process systems
Compatibility & Replacements
Compatible With
- All Martin 3020 Series taper-bushed hubs and sheaves
- Dodge, Browning, and other OEM 3020-series compatible components
- Standard metric and imperial shaft sizes from 2-3/8 inch bore tolerance
- Industrial automation and motion control equipment using taper-lock coupling
Replaces / Drop-In Replacement For
- Martin 3020 2-3/8 (original Martin specification)
- Dodge 3020X2-3/8 Series bushings
- Browning and other third-party 3020-compatible bushings in 2-3/8 bore size
Works With
- ISO 1206-2 Taper Shaft Couplings
- AGMA 9005 power transmission specifications
- Standard industrial pulley and sprocket assemblies
- Both clockwise and counterclockwise rotation applications
