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M.A. Ford Twister Micro-Tuff drill bit size 42 in metallic finish

M.A. Ford

M.A. Ford Twister Micro-Tuff Drill No 42 30509350AM

SKU CH-97AN-4FNCG

A precision No 42 drill bit from the Twister Micro-Tuff range for accurate small-hole drilling

  • Precision drilling with No 42 sizing
  • Micro-Tuff coating resists wear in tough materials
  • Twister flute design clears chips efficiently
  • M.A. Ford quality for professional workshop use
  • California Prop 65 compliance disclosed for safety awareness

Precision Micro Drill No 42

The M.A. Ford Twister Micro-Tuff Drill No 42 is a high-precision cutting tool designed for detailed drilling operations in small diameters. It suits machinists, toolmakers and maintenance technicians who require accurate hole-making in metals and composites where standard drills are too large or lack rigidity.

Replacing Worn Micro Drills

This drill replaces dull or broken micro drills of the same No 42 size when hole tolerance and surface finish begin to degrade. The upgrade is worth it when the previous tool can no longer hold centre or produces excessive burrs on critical features, restoring process reliability without changing the setup.

Simple Collet Installation

Installation is a direct collet or chuck change; the shank seats securely in standard micro tool holders with no shimming or adapters required. The most common issue is excessive run-out caused by a worn collet or debris in the holder, which can snap the fine web at the drill point during the first plunge.

How it compares

Measured against everything we stock in Bits, Hole Saws & Accessory Kits, at today’s prices. Recalculated every night.

Price $20.99
Cheaper than about 62% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameM.A. FORD

Questions about this item

What size collet or chuck does the No 42 Twister Micro-Tuff Drill require?

The No 42 drill uses a standard number-size shank that fits a matching collet or drill chuck; verify your tool holder accepts a number 42 drill before use.

How do I install the 30509350AM drill bit without breaking the micro shank?

Insert the bit fully into the collet, tighten evenly, and start the spindle at low RPM; the most common error is applying side load before the bit is seated.

When should I replace the Twister Micro-Tuff drill after drilling hardened steel?

Replace the drill when the cutting lips show rounding, the margin wears unevenly, or hole diameter drifts beyond tolerance; micro drills dull faster than larger sizes.

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