Overview
The Martin 3020-2-7/8 taper lock bushing is a precision-engineered split-taper coupling designed to mount pulleys, sheaves, sprockets, and other drive components securely onto rotating shafts. Made of sintered powder steel for greater strength and wear resistance than plain carbon steel, this bushing provides excellent clamping force for reliable, wobble-free power transmission across industrial machinery, construction equipment, and production systems.
Key Features
- Tapered non-flanged split bushings utilize screws to tighten on the shaft, providing excellent clamping force
- Flush mounted for reduced mounting width and has a split taper for a tight clamp to shafts
- 8° taper grips tight, holds true, no wobble
- Keyed to the shaft to prevent the shaft from rotating in the bushing
- Clean, compact design with no protruding parts
Technical Specifications
- Series: 3020
- Bore Diameter: 2.875 in (2-7/8″)
- Outside Diameter: 4.25 in
- Hub Diameter: 5.625 in
- Overall Length: 2 in
- Length Through Bore: 2 in
- Material: Sintered Steel
- Keyway Size: 3/4 x 3/8 in
- Taper Angle: 8°
- Torque Capacity: 24,000 in-lb
- Bolt Circle Diameter: 4 in
- Number of Bolt Holes: 2
- Screw Thread Size: 5/8-11 in
- Screw Length: 1.25 in
- Weight: approximately 3.75 lbs
Typical Applications
- Industrial motor and pump mounting systems
- Conveyor system drive components
- Agricultural machinery shaft couplings
- Construction equipment power transmission
- Machine tool pulley and sheave mounting
- Precision machinery requiring low-wobble shaft connection
Compatibility & Replacements
Compatible With
- Standard industrial shafts with 2.875″ bore specification
- Pulleys, sheaves, and sprockets designed for 3020-series taper bushings
- Drive systems requiring sintered steel bushings
- Equipment using 8° taper lock technology
Replaces / Drop-In Replacement For
- Dodge 3020 X 2-7/8-KW
- US Tsubaki 3020 2-7/8
- Precision Pulley & Idler 3020 2-7/8
- Warner Electric 3020 X 2-7/8-KW
- Other 3020-series 2.875″ bore taper bushings from equivalent manufacturers
Works With
- Standard taper lock pulley, sheave, and sprocket hubs
- Industrial power transmission systems using keyway-based shaft locking
- Both horizontally and vertically mounted drive assemblies
