Nicholson Two Bolt Carbide Knife Arms If you debark at medium to high feed speeds, you may need Nicholson plate type knife arms with Carbide Leading Edge technology and two bolt knife tip holders.  Plate arms have more room between the underside of the arm and ring face to let the bark escape during debarking.  This becomes more important as feed speeds increase and with species that have thick or stringy bark. These are also low mass arms that react faster to log contours and save surface fiber. The Carbide Leading Edges on our arms stay sharp over very long periods.  Sharp leading edges allow the arms to self-open quickly and cleanly.  This saves valuable fiber on the infeed end of the log and dramatically reduces knife arm wear.  Correct opening also improves the whole feeding process and keeps logs flowing smoothly through the debarker. Carbide Leading Edge Arms are not repairable, and are simply replaced when needed.  Replacement is easy as the hubs remain on the ring and only the arm is replaced. Switch to Nicholson Carbide Edged Plate Arms today and reduce your yearly maintenance costs.  Contact us today and see how these arms can help your bottom line! Unsurpassed knife arm life. Reduce maintenance costs. Better high speed debarking. Get better bark escapement. Save valuable log end fiber. Reduce maintenance time. Much smoother feeding. Stay on-line longer.