When rolling rod or wire in a forming roll, what must be used?

• A. A clamp
• B. A guide wheel
• C. Grooves on end of roll
• D. Extra support

Answer: (C)

When rolling rod or wire in a forming roll, the material must be guided and seated so it stays centered and in consistent contact with the rolling surfaces. The grooves at the ends of the roll act as a cradle that matches the rod or wire diameter, capturing it as it enters the nip and preventing it from wandering or slipping out. This ensures steady feeding, proper alignment, and uniform reduction along the length. A clamp would get in the way of continuous feeding and rotation. A guide wheel can help in some setups but doesn’t provide the necessary end seating and capture the way grooves do. Extra support alone isn’t enough to control the entry and positioning of the wire.