Four Sheaves Combined Block Heavy Duty Pulley System For Power Transmission Line Construction

Core Features

• Forged alloy steel construction with zinc-plated surfaces
• Four precision-engineered sheaves on premium sealed bearings
• 360° swivel hook with automatic safety latch
• Working Load Limit: 3-20 tons (configurable)
• Compatible with 1/4" to 7/8" diameter wire ropes
• Bright orange powder-coated finish for high visibility

Performance Advantages
◆ 40% reduction in required manpower vs single-sheave blocks
◆ 30% faster cable pulling operation completion
◆ 4:1 mechanical advantage for heavy lifting
◆ Dynamic load tolerance up to 2.5x WLL
◆ Corrosion-resistant for outdoor use (IP54 rating)

Safety Compliance
✓ OSHA 29 CFR 1926.251 compliant
✓ ANSI/ASME B30.26 certified
✓ Magnetic particle inspected components
✓ Clearly stamped load rating plates
✓ Anti-swing weight distribution design

Maintenance & Service
• Self-lubricating bearing system
• Field-replaceable wear components
• Inspection ports for visual checks
• RFID tracking tag compatible
• 24-month warranty against defects

Typical Applications
► Transmission tower structural member lifting
► Conductor stringing operations
► Substation transformer positioning
► Underground cable pulling guidance
► Temporary guy wire tensioning

Optional Accessories

• Synthetic rope sheave inserts (nylon/PVC)
• Weatherproof storage cover
• Custom load rating charts
• Laser-etched asset ID tags
• Mobile inspection app integration