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Tiny 0.78 mm gold twist drill bit on plain background

M.A. Ford

M.A. Ford Twister Micro-Tuff Drill 0.78 mm 305M0078

SKU CH-ATHD-GCS8W

A 0.78 mm micro drill bit designed for precision drilling in demanding applications

  • Micro-Tuff coating extends tool life
  • 78 mm diameter drills precise small holes
  • Twister geometry improves chip evacuation
  • New condition ensures full performance
  • California Proposition 65 warning applies

M.A. Ford 0.78 mm Micro-Tuff Drill

The M.A. Ford Twister Micro-Tuff Drill measures 0.78 mm in diameter and carries part number 305M0078. It is a new power-tool accessory designed for precision drilling in a workshop or production environment. The supplier notes that orders of $75 or more ship free and the item ships directly from the manufacturer.

Suited for fine-hole drilling tasks

This drill suits machinists and technicians who need a 0.78 mm cutting tool for small-diameter work. It is not intended for larger hole sizes, heavy material removal or applications that require a different diameter or flute geometry. Buyers needing a broader range of sizes should look at other tooling options.

Behaviour under sustained use

The Micro-Tuff construction is built to maintain cutting performance during repeated drilling cycles rather than only in short bursts. California Proposition 65 warnings indicate the product contains a chemical known to the state to cause cancer and birth defects or other reproductive harm. Proper ventilation and handling practices are recommended for extended operation.

How it compares

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

Price $12.99
Cheaper than about 82% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameM.A. FORD

Questions about this item

What collet or chuck size is required to hold the 0.78 mm shank?

A precision collet or drill chuck that accepts 0.78 mm shanks is needed; standard 1/8 inch or 3 mm collets will not grip this diameter securely.

Can this drill be used in a standard 1/4 inch hex impact driver?

No, the 0.78 mm round shank is not compatible with 1/4 inch hex quick-change chucks; it requires a three-jaw chuck or ER collet system.

How can I verify the drill is cutting correctly after installation?

The drill should produce a clean, round hole of 0.78 mm diameter with minimal burr and no excessive heat or chatter when run at recommended RPM for the material.

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