To provide better web control, these idler rolls feature hundreds of precision-machined grooves so air can escape from between the roll and web. This unique roll finish improves web tracking and reduces web drift, slippage and web marking, especially with lighter webs and faster line speeds. Standard microgrooves are machined to exactly 0.008-inch deep, 24 grooves per inch. Ultra-fine patterns can contain up to 100 grooves per inch. Microgrooves are available on all the company’s rollers including aluminum, steel and stainless steel idlers.