Overview
The Martin 2012-1-7/8 taper bushing is a precision-engineered power transmission component manufactured by Martin Sprocket & Gear, a leader in ANSI-compliant mechanical drives and automation components. This split-taper style bushing accommodates a 1.88″ (1-7/8″) shaft bore and is designed for flush mounting in tight spaces where component protrusion must be minimized. The 2012 series represents Martin’s standard non-flanged taper lock geometry, ideal for agricultural, industrial, and automotive power transmission applications.
Key Features
- Sintered steel construction: Made of sintered powder steel for greater strength and wear resistance than plain carbon steel
- Split-taper design: Has a split taper for a tight clamp to shafts
- Keyway design: Keyed to the shaft to prevent the shaft from rotating in the bushing
- Flush mounting: Flush mounted for reduced mounting width in pulley and sheave assemblies
- Standard ANSI compliance: Meets American National Standards Institute specifications for interchangeability with industry-standard taper bushings
Technical Specifications
- Bore diameter: 1.88 inches (1-7/8″)
- Outside diameter: 2.75 inches
- Barrel length: 1.25 inches
- Material: Sintered steel
- Mounting style: Non-flanged, split taper with set screws
- Bushing series: 2012 (Martin standard)
Typical Applications
This taper bushing is used in automobiles, construction equipment, agricultural machinery, and home appliances, among others. Common uses include:
- Pulley mounting on motor and engine shafts
- Sheave attachment in belt drive systems
- Sprocket coupling for chain drive power transmission
- Equipment requiring flush-profile bushing design
- Agricultural and construction equipment drivetrain assembly
Compatibility & Replacements
Compatible With
- 1-7/8″ nominal shaft bores
- Tapered-bore pulleys, sheaves, and sprockets (any manufacturer)
- Motor and engine drive shafts rated for taper lock design
- ANSI-standard taper bushed power transmission components
Replaces / Drop-In Replacement For
- Warner Electric 2012X1-7/8
- Dodge 2012X1-7/8
- TB Woods TL2012-1-7/8
- Other ANSI-compliant 2012 series 1-7/8″ bore taper bushings
Works With
- All ANSI standard tapered-bore pulleys rated for 2012 bushing geometry
- Standard set-screw tightening (no special tools required)
- Metric or imperial shaft sizing (shaft bore must match 1.88″ specification)
- Standard mechanical drive systems without electronic feedback
