M2 HSS 25″ × 1-1/2″ × 3/16″ Smooth-Back Planer/Jointer Knife Bar

Description

The TN301H is a 25-inch M2 HSS smooth-back planer and jointer knife bar, 1-1/2 inches wide and 3/16 inches thick. Smooth-back bars carry a flat rear surface suited to knife heads using gib bars or wedge clamps rather than corrugation-based knife retention. The 1-1/2-inch width accommodates profile heights within this dimension; the 3/16-inch thickness matches heads specifying this knife slot depth. Bar-length stock is cut to required machine knife lengths in-shop — a 25-inch bar yields multiple individual knives for standard machine widths. M2 molybdenum HSS provides improved toughness and wear resistance over T1 grades, making it a capable choice for demanding production planing and jointing, particularly in harder domestic and import species where standard HSS shows accelerated edge wear. Ground on standard surface grinding equipment. Confirm the installed head uses smooth-back knife format at 3/16″ thickness before ordering.