M.A. Ford Twister Micro-Tuff Drill 0.55 mm 305M0055

Micro drill for fine-hole tasks

The M.A. Ford Twister Micro-Tuff Drill 0.55 mm is a precision cutting tool built for small-diameter drilling in metals and composites. It suits machinists, model engineers and maintenance technicians who need clean, accurate holes without wandering. The stubby Micro-Tuff geometry keeps the flute short for maximum rigidity in tight spaces. This item is new and ships directly from the manufacturer.

0.55 mm cutting diameter

The single specification that decides fit is the 0.55 mm drill diameter, which matches the 305M0055 part number. No other size or shank variant is included in this listing. Buyers who need a different diameter, a longer flute length or a coated version must select another part number. The tool carries a California Proposition 65 warning for chemicals known to cause cancer and reproductive harm.

Rigid stub flute resists deflection

Under sustained feed pressure the short flute length limits flex, so the drill maintains its centre line through the full depth of cut. Heat builds more slowly than in longer micro drills, reducing the risk of work hardening in stainless or titanium alloys. The design is not suited for deep-hole drilling beyond the flute length or for high-volume production runs that demand through-coolant capability.