Overview
The Martin 2012 1-3/4 taper bushing is a premium sintered steel split-taper bushing designed for secure mounting of pulleys, sheaves, sprockets, and other power transmission components onto drive shafts. This non-flanged, flush-mount design delivers a tight clamp and compact profile, making it ideal for space-constrained applications in industrial machinery, conveying systems, and drive trains.
Key Features
- Sintered Steel Construction: Sintered powder steel provides superior strength and wear resistance compared to plain carbon steel, extending service life in demanding applications.
- Split-Taper Design: Tapered bore geometry with split construction allows secure clamping to the shaft when tightened against the driven component’s tapered hub.
- Flush-Mount Configuration: Non-flanged design reduces mounting width and simplifies assembly in equipment with space limitations.
- Keyed Bore: Finished keyway prevents shaft rotation, ensuring reliable torque transfer and component retention.
- ANSI/NAS Standard Compliance: Engineered to meet industry standards for interchangeability and performance consistency.
Technical Specifications
| Bushing Series | 2012 |
| Bore Diameter | 1.75″ (1-3/4″) |
| Outer Diameter | 2.75″ (2-3/4″) |
| Barrel Length | 1.25″ |
| Keyway Size | 7/16″ x 7/32″ |
| Taper Angle | 8 degrees |
| Material | Sintered Steel |
| Hub Outside Diameter (Standard) | 3-7/8″ |
| Bolt Circle Diameter | 2-5/8″ |
| Number of Bolt Holes | 2 |
| Screw Thread Size | 7/16-14 |
| Screw Torque | 280 in-lb |
| Mounting Type | Non-flanged, flush-mount |
Typical Applications
- Industrial pulley and sheave mounting on motor and drive shafts
- Sprocket installation in conveying and power transmission systems
- Machine tool drive train assemblies
- Agricultural and construction equipment drivetrain components
- Compact machinery requiring space-efficient coupling solutions
Compatibility & Replacements
Compatible With
- Taper-bushed pulleys, sheaves, and sprockets (standard ANSI taper geometry)
- Motor and gearbox output shafts up to 1.75″ diameter
- Conveyor drive and drive train shafts
- Industrial power transmission equipment using standard taper bore hubs
Replaces / Drop-In Replacement For
- OEM Martin 2012 1-3/4″ bushings in existing applications
- Interchangeable with equivalent taper bushings from other manufacturers meeting ANSI/NAS standards (verify hub taper geometry before ordering)
Works With
- Standard taper-bore power transmission components (pulleys, sheaves, sprockets)
- Motor shafts and gearbox output shafts
- Industrial conveying and drive systems utilizing taper-lock bushing technology
