Crane Arm Attachment

Description

Carton Clamp Attachment

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A forklift crane arm attachment, often called a forklift jib, is designed to convert a standard forklift into a mobile crane.
These attachments are essential for lifting “long” or “awkward” loads that cannot be balanced on standard forks.
Specifications vary by model (fixed vs. telescopic), but standard units generally fall into the following categories:

General Specifications Table

Feature Standard Fixed Jib Telescopic (Extendable) Jib.
Capacity (WLL) 2,500kg – 5,000kg 2,500kg – 10,000kg.
Max Reach 1.8m – 2.0m 3.5m – 4.0m.
Retracted Length ~1.3m ~2.1m.
Unit Weight 100kg – 130kg 140kg – 450kg.
Finish Galvanized or Zinc Plated Galvanized or Powder Coated.

Key Technical Components

Fork Pockets: These are the sleeves the forklift tines slide into.
Standard Size: Often 165mm x 65mm or 185mm x 75mm.
Pocket Centres: Usually spaced at 250mm to 350mm to fit standard carriage widths.
Securing Mechanism: Most units use a safety chain or heel pins that lock the attachment to the forklift carriage to prevent it from sliding off the forks.
Lifting Points: Units typically feature multiple hook positions.
Note: As you move the hook further away from the forklift (the “load center”), the lifting capacity decreases significantly.

Capacity vs. Extension (Example Chart)

For a 4.5 Tonne Telescopic Jib, the Safe Working Load (SWL) typically drops as the arm extends:
Position 1 (Retracted – 670mm): 4,500 kg.
Position 4 (Mid-range – 1925mm): 750 kg.
Position 6 (Fully Extended – 3465mm): 200 kg.
Warning: The “Structural Capacity” of the jib is often higher than what your forklift can actually handle. You must multiply the forklift’s rated capacity by 0.8 when using a jib to account for the “swinging load” factor (per AS2359.1 standards).

Common Types

Fixed Jib: Best for repetitive tasks at a constant height/distance.
Telescopic Jib: Allows for adjustable reach; ideal for reaching over obstacles or into the back of trucks.
Tilt/Adjustable Jib: Can be angled upwards (often up to 15°–45°) to provide extra lift height, which is useful when the forklift mast has reached its maximum height.

Safety & Compliance

Data Plate: Every attachment must have a visible plate stating its Brand, Model, Serial Number, Weight, and WLL for each hook position.
Certification: Ensure the unit is CE marked or meets local standards (e.g., OSHA in the US, Australian Standards).
Would you like me to find a load chart for a specific forklift capacity (e.g., 2.5 ton or 5 ton) to see how it affects the lift limits?