Overview
The Dodge 120378 is a Type SD quick disconnect (QD) bushing engineered for industrial power transmission applications. This ductile iron component features a 1-3/8″ bore diameter and provides reliable shaft mounting for pulleys, sheaves, and sprockets. With its proven flanged design and 4-degree angled taper, the Dodge 120378 delivers secure engagement while maintaining ease of installation and maintenance in demanding industrial environments.
Key Features
- Type SD QD Design — Flanged construction with 4-degree angled taper for reliable power transmission
- Quick On/Off Operation — Easy installation and removal without requiring complete shaft disassembly
- High Torque Capacity — 5000 in-lb torque rating when installation screws are properly tightened
- Ductile Iron Construction — Robust material for industrial duty cycles and shock loads
- Keyway Design — 5/16 x 5/32 in keyway for positive shaft engagement
- 3-Bolt Flange — Precision bolt circle for secure hub mounting
Technical Specifications
| Bore Diameter | 1-3/8 in |
| Barrel Diameter | 2.18 in |
| Hub Diameter | 3.81 in |
| Flange Diameter | 3.18 in |
| Flange Thickness | 7/16 in |
| Bolt Circle | 2-11/16 in |
| Bolt Holes | 3 (1/4 x 1-7/8 in screw) |
| Overall Length (OAL) | 1-13/16 in |
| Keyway | 5/16 x 5/32 in |
| Torque Rating | 5000 in-lb |
| Material | Ductile Iron |
| Series / Type | SD (Type SD QD Bushing) |
| Manufacturer | Dodge Industrial (Baldor) |
| Part Number | 120378 (SD X 1-3/8-KW) |
| Condition | New in Box |
Typical Applications
The Dodge 120378 QD bushing is ideal for applications requiring frequent pulley or sprocket changes, maintenance intervals, or rapid reconfiguration. Common uses include:
- V-belt and flat-belt conveyor drives
- Pump and fan motor mounting
- Industrial machinery requiring quick shaft coupling
- Sheave replacement without shaft removal
- Sprocket-driven systems in production lines
- Food processing and packaging equipment
Compatibility & Replacements
Compatible With
- Dodge SD-series quick disconnect hubs
- Standard 1-3/8″ bore sheaves and pulleys
- Sprockets with compatible hub bore
- Industrial motor and gearbox shafts (1-3/8″ diameter)
- Belt drive systems (V-belt, synchronous, flat-belt)
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The Dodge 120378 is a Type SD variant; confirm that your existing application uses SD-series bushings and not SDS or other type variants.
Works With
- Dodge Industrial QD hub assemblies
- Standard power transmission equipment requiring 1-3/8″ bore bushings
- Industrial maintenance workflows and equipment redesign
- Shaft diameters compatible with 5/16 x 5/32 in keyway standard
