Overview
The Dodge 120471 is a Type SF quick disconnect (QD) bushing engineered for secure, easy-disconnect coupling of pulleys, sprockets, and sheaves to drive shafts. Featuring a tapered bore design with integral compression flange and set screw, this bushing accepts 1-15/16″ shaft diameters and delivers proven torque holding power in both conventional and reverse mounting configurations. Manufactured from ductile iron and sintered steel, the 120471 meets demanding power transmission and agricultural drive specifications. Standard installation torque is 360 in·lb.
Key Features
- Type SF Size Class: Designed for 1-15/16″ shaft bores; bore diameter actual 1.9375 in (49.213 mm)
- Quick Disconnect Design: Single full-length saw cut enables fast, tool-free removal and reinstallation without hub disassembly
- Dual Mounting Capability: Supports both conventional and reverse mounting orientations for design flexibility
- Keyway Standard: 1/2″ × 1/4″ shaft keyway accommodates matched key stock (1/2″ × 1/2″ reference)
- Heavy-Duty Materials: Ductile iron and sintered steel construction rated for high-torque, continuous-duty applications
- Installation Torque: 360 in·lb pull-up screw specification ensures proper cone grip without bushing damage
Technical Specifications
Bore & Geometry: Bore length: 2.000 in (50.8 mm) | Bore diameter: 1.9375 in (49.213 mm) | Weight: 3.87 lb
Keyway Dimensions: Shaft keyway: 1/2″ × 1/4″ | Bushing keyway reference: 1/2″ × 1/2″
Installation Torque: 360 in·lb (specification torque when cap screws tightened to standard wrench torque)
Material Grade: Ductile iron and sintered steel
Mounting Styles: Conventional and reverse mounting supported
Installation Gap: When properly installed, 1/8″ to 1/4″ gap should exist between bushing flange and hub
Surface Prep Requirement: Tapered surfaces must be free of oil, paint, dirt, and anti-seize compounds
Typical Applications
- Belt Drive Systems: V-belt and flat-belt power transmission with sheaves and pulleys
- Sprocket Drives: Chain drive applications requiring rapid sprocket changeout or maintenance
- Coupling & Flex Hubs: Shaft-to-hub connections in industrial gearboxes and motor assemblies
- Agricultural Equipment: Combines, balers, and hydraulic drive systems where field replacement speed is critical
- Pump & Compressor Drives: Fixed-torque industrial pump and air compressor coupling
Compatibility & Replacements
Compatible With
- QD quick-disconnect hubs (Type H series and equivalent)
- Standard sheaves and pulley hubs machined for SF-series bushings
- Martin, Ameridrives, Aetna, Allied-Locke, and equivalent QD sprockets and hubs
- Any shaft application requiring 1-15/16″ bore with 1/2″ × 1/4″ keyway
Replaces / Drop-In Replacement For
- Direct replacement for Dodge 120471 applications
- Interchangeable with equivalent OEM SF 1-15/16″ QD bushings from competing manufacturers
- Verify hub bore and keyway match before installation
Works With
- Dodge QD installation tools and torque specifications
- Standard cap screws and lock washers per AGMA/ISO mounting standards
- Conventional industrial sheaves, sprockets, and pulley assemblies
- Both single and multiple-bushing drive configurations
