During chain inspection, approximately how many degrees should the chain links be able to rotate side to side without binding?

• A. 30°
• B. 45°
• C. 90°
• D. 60°

Answer: (C)

The key idea is how freely chain links can articulate with each other. When you inspect the chain, each link should be able to swing side-to-side about 90 degrees without binding. This amount of rotation provides enough clearance for the chain to follow load directions and sit properly under tension, which is essential for safe lifting. If the chain binds well before reaching 90 degrees—say due to worn pins, elongated holes, bent or burr-edged plates, or corrosion—that indicates compromised condition and a higher risk of failure. So, about 90 degrees is the checking target because it reflects healthy clearance and smooth movement; less than that signals potential serviceability issues, while the geometry and wear typically prevent exceeding 90 degrees.