Ribbed and smooth rollers made of steel which are used as contact sanding roller in wide belt sanders for calibrating. Other than steel rollers, rubber rollers are also used in sanding.
Steel rollers are required for calibrating whenever the workpiece has portions of soft and hard wood. For example:
- Early and late wood zones, especially at wide growth rings
When calibrating with rubber rollers, the soft parts would be ground out more, giving the illusion of antique wood.