Monkey Hoist Information

What is a Monkey Hoist

A Monkey Hoist is a compact, manually operated lifting device used to hoist heavy loads vertically. Typically featuring a chain or rope mechanism, it is designed for small-scale construction, workshops, and maintenance tasks where portability and simplicity are prioritized.

History of Monkey Hoist

Originating in the early 20th century as a tool for shipyards and railroads, early Monkey Hoists used ratchet-and-pawl systems. By the 1950s, improved gear designs increased load capacities. Modern versions incorporate lightweight alloys and safety locks, maintaining relevance in trades requiring precise load positioning.

Purpose of Monkey Hoist

Enables safe lifting of machinery, construction materials, or equipment (100–2,000 kg capacity). Ideal for tasks like engine repairs, beam installations, or loading/unloading in confined spaces. Reduces reliance on powered equipment for intermittent lifting needs.

Principle of Monkey Hoist

Uses a hand-operated lever to engage gears that wind a chain or cable around a drum. The ratchet system holds the load at height, while a release lever allows controlled descent. Mechanical advantage is achieved through gear ratios (typically 5:1 to 20:1).

Features of Monkey Hoist

• Manual Operation: No external power required
• Load Arrestor: Automatic brake prevents accidental drops
• Adjustable Hook: Swiveling design for alignment
• Compact Build: Weights 10–25 kg for easy transport
• Durable Chains: Grade 80/100 alloy chains for heavy loads

Types of Monkey Hoists

• Lever Chain Hoists: Ratchet-driven for precision
• Pulley Block Hoists: Double/triple sheave configurations
• Trolley-Mounted: Moves along I-beams for horizontal positioning
• Aluminum Body: Corrosion-resistant for outdoor use
• High-Lift Models: Extended reach up to 15 meters

Precautions for Using Monkey Hoist

• Load Limit: Never exceed SWL (Safe Working Load)
• Anchor Point: Verify structural capacity of support beam
• Chain Inspection: Check for twists/links damage pre-use
• Lubrication: Monthly greasing of gears/pivots
• Operator Position: Stand clear during ascent/descent

Things to Consider When Purchasing

• Capacity: Match to typical load weights + 25% margin
• Lift Height: Minimum 3m for most construction tasks
• Certification: CE/ASME B30.21 compliance
• Warranty: 2+ years on gears and brake systems
• Accessories: Availability of slings/hooks replacements

Terms of Monkey Hoist

• SWL: Safe Working Load stamped on body
• Lift Speed: 0.5–1.5 meters per minute (manual)
• Duty Cycle: Intermittent use (max 10 mins/hour)
• Overload Protection: Mechanical fuse at 150% SWL
• Proof Test: Factory testing at 125% SWL