Overview
The Martin 3 B 66 SD is a conventional quick disconnect V-belt sheave designed for reliable power transmission in industrial machinery. This 3-groove, bushed-bore sheave features a quick-disconnect mechanism that simplifies installation and maintenance without requiring shaft removal. Built to exacting specifications, the Martin 3 B 66 SD is ideal for applications requiring frequent pulley replacement or adjustments.
Key Features
- Quick disconnect (QD) bushed bore design for easy installation and removal
- 3 grooves compatible with B-section (5L) V-belts
- Precision-manufactured from class 30 gray iron for durability
- Statically balanced for smooth operation
- Adjustable bore range accommodates multiple shaft diameters (1/2″ to 2″)
- Conventional profile compatible with standard industrial V-belt systems
Technical Specifications
- Outside Diameter: 6.95 inches
- Groove Count: 3
- Belt Section: B (5L)
- Bore Type: QD bushed (SD bushing required)
- Bore Range: 1/2″ to 2″ diameter
- Material: Class 30 gray iron
- Weight: 12.0 lbs
- Bushing: SD quick-disconnect style
- Balance: Static
Typical Applications
The Martin 3 B 66 SD is used in:
- Industrial belt drive systems with variable speed drives
- HVAC equipment and ventilation systems
- Conveyor and material handling machinery
- Pump and motor drive applications
- Equipment where rapid pulley changes improve maintenance efficiency
Compatibility & Replacements
Compatible With
- Martin SD-series quick-disconnect bushings (1/2″ to 2″ bore)
- Standard B-section (5L) V-belts
- Industrial motors and driven equipment with compatible shaft sizes
- Multi-groove belt drive systems
Replaces / Drop-In Replacement For
- OEM part for Martin-equipped machinery
- Direct replacement for existing 3 B 66 SD applications
Works With
- B-section conventional V-belt systems
- Industrial power transmission applications requiring conventional sheave profiles
- Equipment designed for Martin QD-style bushings
