Overview
The Martin 3020 2 7/8 taper lock bushing is a precision-engineered shaft coupling component used in mechanical power transmission systems. Tapered non-flanged split bushings utilize screws to tighten on the shaft, providing excellent clamping force, making them ideal for applications requiring secure, vibration-resistant mounting. The 2-7/8-inch bore accommodates a range of industrial shaft sizes while maintaining an 8° taper that grips tight, holds tight, runs true, with no wobble and flush mounting—no protruding parts.
Key Features
- Standard 3020 series design—industry proven for over 40 years
- Provides excellent clamping force over standard bored-to-size product that only utilizes a keyway and setscrew
- Clean, compact profile suitable for confined mounting spaces
- 8-degree taper ensures secure engagement without axial movement
- Two-bolt fastening system for balanced load distribution
- Finished with standard keyway for positive torque transfer
Technical Specifications
Martin Taper Lock Bushing, Standard, 2-7/8 in Bore Dia, 4-1/4 in Barrel Dia, 5-5/8 in Hub Dia, 8 deg Taper, 4 in Bolt Circle, 2 Bolt Holes, 5/8-11 x 1-1/4 in Screw, 24000 in-lb, 2 in Overall Length, 3/4 x 1/4 in Keyway, Steel.
Typical Applications
3020 taper lock bushings are used in a wide range of applications including belt pulleys, sprockets, drum pulleys, drive pulleys, tail pulleys, sheaves, and gears. Common industrial uses span conveyor systems, motor-driven equipment, and general mechanical power transmission in manufacturing, material handling, and automation environments.
Compatibility & Replacements
Compatible With
- Martin sprockets and sheaves (3020 series bore pattern)
- Standard 2-7/8-inch shaft applications
- 5/8-11 thread fastening systems
- Industrial pulley and belt drive systems
- Conveyor and drive line assemblies
Replaces / Drop-In Replacement For
- Dodge 3020 X 2 7/8 KW taper lock bushings
- US Tsubaki 3020 2 7/8 taper bushings
- Other equivalent 3020 series 2.875-inch bore designs from industrial distributors
Works With
- Martin sprockets in 3020 bore configuration
- Standard V-belt and synchronous belt pulley hubs
- Sheaves and drive components with 4-inch bolt circle patterns
- Fixed-torque and variable-speed drive systems rated for 24,000 in-lb service
