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A cost-effective option for large-diameter drilling, the Dormer Hydra program supports structural and general engineering applications. The range of solid-carbide heads – for steel, stainless steel and cast iron – are married together with a high-speed steel body.
Existing body options – 3xD, 5xD and 8xD – have been expanded with a 12xD for deep hole applications and a 1.5xD for improved rigidity in shallow hole and plate drilling.
Offering consistently high performance, even after numerous head changes, the range of bodies incorporates coolant holes to improve cutting efficiency and chip evacuation. The exact fit between head and body maximizes tool rigidity for superior hole accuracy and precise tolerances.
Also, one body can fit multiple solid carbide head sizes, reducing inventory requirements. In addition, heads can be easily changed without removing the body from the spindle, minimizing machine downtime.
Related Glossary Terms
- coolant
coolant
Fluid that reduces temperature buildup at the tool/workpiece interface during machining. Normally takes the form of a liquid such as soluble or chemical mixtures (semisynthetic, synthetic) but can be pressurized air or other gas. Because of water’s ability to absorb great quantities of heat, it is widely used as a coolant and vehicle for various cutting compounds, with the water-to-compound ratio varying with the machining task. See cutting fluid; semisynthetic cutting fluid; soluble-oil cutting fluid; synthetic cutting fluid.
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