Profile: Nicholson Mfg. Co. produces ring debarkers. Our oil recirculation system reuses the ring air seal lubricant and provides a cleaner operating environment. Our patented nicholson stringy bark slitter ring arms are available to debark problem species like redwood, cedar and eucalyptus. Our parts include fiberguard feedrolls, retrofit fiberguard, fiberguard brochure, improved lube pump, knife arms & tips. Our spikeless fiberguard feedrolls avoid penetration of the log's surface and protect the high-value wood. We are an ISO 9001-2000 certified company. We also focus on technologies like robotic welding, in-house gear hobbing, in-house heat treating, plasma cutting systems and high production DNC machine centers.