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Small silver twist drill bit with sharp point and fluted shaft

M.A. Ford

M.A. Ford Twister Micro-Tuff Drill No 40 Part 30509800AM

SKU CH-8TAX-411NY

Twister Micro-Tuff Drill No 40 designed for precision drilling applications

  • M.A. Ford brand trusted for precision drilling
  • Twister Micro-Tuff design for reliable performance
  • Size No 40 suits fine-hole applications
  • Part 30509800AM ensures exact replacement fit
  • California Prop 65 chemical disclosure included

Twister Micro-Tuff Drill No 40

The M.A. Ford Twister Micro-Tuff Drill No 40 is a precision cutting tool designed for drilling small holes in a variety of materials. It carries the manufacturer part number 30509800AM and is supplied in new condition.

Users needing a Number 40 drill bit for detailed

This drill suits machinists and technicians who specifically require a No 40 size for pilot holes or fine detail work. Buyers who need a different diameter or a complete drill set should look at other options.

Size designation No 40

The critical specification is the No 40 size designation, which determines the exact hole diameter this bit produces. Verify this specific size matches your engineering drawing or tap chart before ordering.

How it compares

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

Price $18.99
Cheaper than about 66% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameM.A. FORD

Questions about this item

How do I install the No 40 drill in a chuck without damaging the shank?

Tighten the chuck jaws evenly around the shank of the 30509800AM drill so the flutes remain clear of the jaws; the step people get wrong is over-tightening on the fluted section instead of the smooth shank.

What maintenance will the No 40 drill need after repeated use?

Inspect the cutting edges for wear and resharpen using a drill sharpener set to the original point angle; replace the drill when the diameter falls below the No 40 size.

What limit appears first when drilling continuously with the No 40 drill?

Heat buildup at the cutting edges is the first limit; use cutting fluid and reduce feed pressure to keep the 30509800AM drill within its working temperature range.

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