Overview
The Martin 2012-1-5/8 taper bushing is a precision-engineered split taper lock bushing built for reliable shaft-mounted power transmission applications. With a 1.625-inch bore diameter and durable steel construction, this non-flanged design delivers excellent clamping force when fastened to tapered component bores. Whether mounting pulleys, sheaves, or sprockets, the Martin 2012-1-5/8 provides the mechanical holding strength and flush positioning needed in industrial machinery.
Key Features
- Non-flanged, flush-mount design eliminates protruding parts and installation complexity
- Split taper construction delivers increased clamping force over standard bored-to-size bushings
- Steel material provides durability in demanding power transmission environments
- Two-bolt mounting configuration with standardized screw torque specifications for straightforward installation
- Finished keyway accommodates shaft keys to prevent rotational slip
Technical Specifications
- Bushing Size: 2012
- Bore Diameter: 1.625 inches (1-5/8″)
- Material: Steel
- Barrel Diameter (Large End): 2.75 inches
- Overall Dimensions: 2.875″ L × 2.875″ W × 1.375″ H
- Barrel Length (Length Through Bore): 1.25 inches
- Keyway Size: 3/8″ × 3/16″
- Bolt Circle Diameter: 2.625 inches
- Number of Mounting Holes: 2
- Screw Thread Size: 7/16-14
- Screw Length: 7/8 inch
- Screw Torque Specification: 280 in-lb
- Weight: 1.10 lbs
- Bore Type: Finished with Keyway
Typical Applications
Martin 2012 series taper bushings are used across multiple industries to mount and drive mechanical components:
- Pulley and sheave mounting on motor and pump shafts
- Sprocket attachment for chain or belt drive systems
- Conveyor and material handling equipment
- Industrial pump and compressor assemblies
- Machine tool spindle and transmission systems
Compatibility & Replacements
Compatible With
- Tapered pulley bores (ANSI standard taper)
- Tapered sprocket and sheave hubs
- Motor and driven-shaft assemblies
- Power transmission components finished with 8-degree tapered bores
Replaces / Drop-In Replacement For
- Martin 2012 1-5/8 (all standard versions with 1.625″ bore)
- OEM bushings in equivalent size and taper class
Works With
- ANSI B29.1 standard chain and sprocket systems
- Standard V-belt pulley assemblies
- Industrial mechanical drives requiring tapered bushing inserts
