M.A. Ford HPDCR 0740A Twister HPD coolant drill 7.40 mm

7.40 mm coolant drill application

The M.A. Ford Twister HPDCR 0740A is a high-performance coolant drill built for precision hole-making in demanding materials. Its 7.40 mm diameter suits production drilling where consistent chip evacuation and tool life matter. Machinists and fabricators running CNC or rigid manual setups will find it suited to repeatable throughput.

5× diameter depth capacity

The 5× length-to-diameter ratio provides reach for holes up to roughly five times the drill diameter before pecking becomes necessary. Through-coolant delivery extends practical depth by flushing chips and controlling heat at the cutting zone. In deep or abrasive cuts the flute length eventually limits chip clearance, requiring intermittent withdrawal.

Through-coolant changes chip control

Internal coolant passages direct fluid to the cutting edges, reducing built-up edge and improving surface finish in stainless steels and high-temp alloys. The design eliminates the need for external flood lines that can miss the hole entry. Shops without through-spindle coolant capability cannot use this feature and would need a solid-shank alternative.