M.A. Ford Twister Micro-Tuff Drill No 39 30509950

Precision Micro Drill for Fine Holemaking

The M.A. Ford Twister Micro-Tuff Drill No 39 is a miniature cutting tool designed for creating very small holes in metal and other materials. It suits machinists, toolmakers and maintenance technicians who require accurate drilling at micro diameters. This accessory fits standard drill chucks or collets on milling machines, lathes or portable drills.

Heat and Wear Management in Normal Use

The Micro-Tuff coating and geometry reduce friction at the cutting edges, limiting heat buildup during high-speed operation. Lower temperatures extend tool life and help maintain hole size consistency across repeated cycles. Efficient chip evacuation prevents packing that can increase torque and noise. The design supports stable performance without excessive power draw from the machine spindle.

Drill Size No 39 Determines Fit

The single specification that decides suitability is the No 39 wire-gauge diameter; the drill cuts a hole matching that specific size only. Buyers needing a different diameter, a larger step size or a non-standard tolerance cannot use this part. The California Proposition 65 notice also indicates the presence of listed chemicals, which may affect material-handling procedures in some facilities.