Overview
The Martin 4 3V 800 SK is a Hi-Cap wedge-stock sheave designed for industrial power transmission applications requiring 3V-section V-belts. With its quick-disconnect (SK QD) bushing system, this sheave provides tool-free mounting and removal on shafts from 1/2″ to 2-5/8″ diameter. The 4-groove configuration and 8″ outside diameter make it ideal for compact drive systems requiring reliable, efficient belt power transmission.
Key Features
- Quick-disconnect SK bushing for rapid installation and removal without tools
- 4-groove design for balanced power distribution across 3V-section belts
- Cast iron construction (class 30 gray iron) rated for maximum speed of 6500 FPM
- Statically balanced for low-vibration operation in industrial equipment
- Compatible with shaft diameters from 1/2″ to 2-5/8″
Technical Specifications
- Manufacturer: Martin Sprocket & Gear
- Model Number: 4 3V 800 SK
- Belt Section: 3V (Hi-Cap Wedge)
- Number of Grooves: 4
- Outside Diameter (OD): 8.00 inches
- Pitch Diameter (PD): 7.95 inches
- Face Width: 2.50 inches
- Bushing Type: SK Quick-Disconnect
- Bore Range: 1/2″ to 2-5/8″
- Material: Cast Iron (Class 30)
- Weight: Approximately 13.1 lbs (sheave only, excludes bushing)
- Maximum Speed: 6500 FPM
- Balancing: Statically balanced
Typical Applications
- Fan and blower drives in HVAC systems
- Pump drives in industrial fluid transfer applications
- General machinery belt drives requiring compact spacing
- Equipment where frequent sheave changes and maintenance are required
- Industrial automation systems requiring reliable power transmission
Compatibility & Replacements
Compatible With
- 3V-section (Hi-Cap) V-belt systems
- SK quick-disconnect bushing systems
- Industrial fan, pump, and blower drive trains
- Standard industrial shaft sizes 1/2″ to 2-5/8″ diameter
Replaces / Drop-In Replacement For
- Browning 43V800SK and similar 4-groove 3V sheaves with SK bushing
- Dodge equivalent 4-groove 3V/5V dual-profile sheaves with SK bushing
- TB Woods equivalent models with comparable groove and section specifications
Works With
- 3V section narrow V-belt drives (Hi-Cap profile)
- SK QD bushing system for quick installation/removal
- Standard industrial motor shafts and driven equipment
- HVAC, industrial pump, fan, and general machinery applications
