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Building on the technology behind the high-performance solid-carbide MP-X 3xD and 5xD drills, the new Dormer R459 coolant-through 8xD drill reportedly reduces machining time for operators by eliminating the pecking process, according to Dormer Pramet, Elgin, Ill.
With fast and efficient chip evacuation, the MP-X 8xD drill is said to reduce the cost per hole and increase overall throughput for users. The microgram carbide material provides a combination of hardness and toughness, resulting in high wear resistance and longer tool life, according to a company news release issued Jan. 7.
With multi-layer Titanium Aluminum Nitride (TiAIN-Top) coating, the Dormer MP-X drill is said to deliver:
- improved stability to the cutting edges,
- outstanding wear protection, and
- high hardness/toughness and oxidation stability.
Ensuring consistent forces throughout the drilling cycle, the CTW™ (Continually Thinned Web) flute geometry optimizes flute volume and breaks the chips into small, manageable pieces to ensure efficient chip evacuation in deep-hole applications. The combination of the split four facet point and the CTW™ flute delivers precise centering and low thrust forces.
Video demonstration shows the Dormer R459 drilling 8xD holes in tool steel (P20/AMG 1.5) at speeds of Vc 80m/min. at 0.14mm/rev.
Related Glossary Terms
- centering
centering
1. Process of locating the center of a workpiece to be mounted on centers. 2. Process of mounting the workpiece concentric to the machine spindle. See centers.
- hardness
hardness
Hardness is a measure of the resistance of a material to surface indentation or abrasion. There is no absolute scale for hardness. In order to express hardness quantitatively, each type of test has its own scale, which defines hardness. Indentation hardness obtained through static methods is measured by Brinell, Rockwell, Vickers and Knoop tests. Hardness without indentation is measured by a dynamic method, known as the Scleroscope test.
- titanium aluminum nitride ( TiAlN)
titanium aluminum nitride ( TiAlN)
Often used as a tool coating. AlTiN indicates the aluminum content is greater than the titanium. See coated tools.
- wear resistance
wear resistance
Ability of the tool to withstand stresses that cause it to wear during cutting; an attribute linked to alloy composition, base material, thermal conditions, type of tooling and operation and other variables.
