CUTTER DETAILS Robbins designs and manufactures the most technically advanced disc cutters worldwide with a commitment to high quality and continual improvement. No matter the geology, no matter the machine type or manufacturer, no matter the size- Robbins has the cutting solution to meet your needs. DISC RINGS Robbins disc rings are composed of proprietary tool steel produced in Germany to Robbins specifications. The steel manufacturing processes are designed to keep impurities to a minimum. Melting in an Electric Arc Furnace is followed by vacuum degassing. Ingot molds are filled from the bottom with the liquid steel shrouded in argon gas. Exceptionally clean steel ensures high resistance to fatigue, resulting in longer cutter disc life. Forgings are made by the closed die method in Germany. Subsequent processing consisting of two machining steps and four heat treatment steps are completed in the USA. BEARINGS Carburized and case-hardened, Robbins uses Timken tapered roller bearings that outperform other bearings in dynamically loaded conditions and harsh environments. During assembly, the bearings are pre-loaded to effectively excavate hard rock in the most severe operating conditions. SEALS Durable metal-to-metal face seals eliminate ingress of foreign materials while silicone torics maintain elasticity even at high temperatures. PRESSURE COMPENSATION RETAINER The patented Robbins pressure compensation retainer has a superior piston design with a much larger surface area than other cutter manufacturers. The outer surfaces are carburized and case-hardened for extended life in harsh conditions. HUB Made of durable alloy steel, Robbins hubs are furnace heat-treated, quenched, and tempered for toughness. The disc-mounting surface is further induction-hardened and finished by grinding. SHAFT Robbins shafts are made of the same alloy steel as the hubs, and go through an identical process of heat-treatment, quenching, and tempering. They are additionally gas nitrided for surface hardness.

ROBBINS DISC CUTTERS SIZE V-Block / O-Block V-Block / O-Block Front & Back Front & Back Front & Back Front & Back Front & Back The patented Robbins pressure compensation retainer has a superior piston design with a much larger surface area than other cutter manufacturers. Durable metal-to-metal face seals eliminate ingress of foreign materials while silicone torics maintain elasticity even at high temperatures. CORPORATE HEADQUARTERS The Robbins Company 29100 Hall Street Solon, Ohio 44139 USA P + 1 440 248 3303 F + 1 440 248 1702 Email [email protected] Visit www.TheRobbinsCompany.com for...