Dormer Pramet expands options for efficient drilling

Dormer Pramet’s hole-making assortment has grown with several additions. The cutting-tool manufacturer has extended its range of Hydra replaceable-head drills, launched a solid-carbide drill for aluminium and added a newly developed spotting drill.

Providing a cost-effective option for large diameter drilling, the Hydra program supports structural and general engineering applications. Its range of solid-carbide heads – for steel, stainless steel and cast iron – are married together with a hardened-steel body.

Existing body options – 3xD, 5xD and 8xD – have been expanded with a 12xD for deep-hole applications and a 1.5xD option for improved rigidity in shallow hole and plate drilling.

Said to deliver consistently high performance, even after numerous head changes, the range of bodies incorporates coolant holes to improve cutting efficiency and swarf evacuation. The exact fit between head and body maximises tool rigidity for better accuracy and precision. Also, one body can fit multiple solid-carbide head sizes, reducing inventory requirements, while heads can be easily changed without removing the body from the spindle, minimising machine downtime.

Meanwhile, Dormer Pramet has extended its Force hole-making assortment, with a solid-carbide drill for all types of aluminium, from soft to abrasive grades. The flute and cutting geometry of the newly developed Force N range features a 32° helix angle, which helps to break swarf into manageable chips and reduce any exit burr that can occur when drilling soft materials.

Offering high metal-removal rates and reduced thrust forces to improve hole quality and productivity, Force N is available in 5xD and 8xD lengths with through-coolant.

Finally, Dormer Pramet has launched a solid-carbide drill for fast and accurate spotting. The R125 has 150°self-centring point geometry, making it suitable for use with high-performance drills featuring point angles around 140°. Providing consistent performance and repeatability in all materials, a multi-layer TiAlN coating ensures longer tool life, improved cutting edge stability and wear protection, says the company.