Technical Specification

Lifting Ring

1. General Description

2. Applicable Equipment

• Model: Robbins 73R, 73RH C, 73RVF Raise Borer
• Brand: Robbins (Epiroc Group)

3. Technical Parameters

• Rated Working Load (WLL): 8000 kg (8 tonnes)
• Minimum Safety Factor: 5:1
• Material: High-strength alloy steel, forged and heat treated
• Thread Specification: M36 × 4
• Rotation: 360° swivel, 180° pivot
• Surface Treatment: Anti-corrosion black oxide coating
• Inspection: 100% magnetic particle testing; proof load tested to 2.5 times WLL
• Operating Temperature: -20℃ ~ +150℃

4. Main Function

1. Acts as a reliable lifting point for equipment parts and modules.
2. Flexible rotation prevents side load and sling twist during lifting operations.
3. Meets safety requirements for mining and engineering machinery lifting work.

5. Remarks

• Genuine OEM part, fully interchangeable with original parts of Robbins 73-series.
• Strictly for lifting equipment, not applicable for personnel hoisting.
• Recommended installation torque: 480–530 N·m (dry threads)