Which type of gripper picks up a large variety of iron-containing metals such as hot iron parts, bottle caps, and mechanical parts?

• A. Vacuum
• B. Expandable
• C. Piston
• D. Magnetic

Answer: (D)

Magnetic gripping relies on magnetic attraction to hold ferrous metals. Because iron-containing parts respond to magnets, a magnetic gripper can pick up a wide variety of items—hot iron parts, bottle caps, and mechanical components—using either a permanent magnet or an electromagnet that can tolerate heat. This lets it grab irregular shapes and different sizes without needing a smooth seal or special surface contact. Vacuum grippers, by contrast, depend on suction and make secure contact difficult on curved or rough surfaces and can be problematic with hot parts. Expandable or piston-based grippers don’t rely on material type and thus don’t inherently target iron-containing metals.