#80–#56 Carburetor Jet Drill Set, 50 Pc, 25 Sizes, 2 Each, Factory Resharpened | D7

Carburetor Jet Drill Set – 50 Piece #80–#56

This 50-piece factory resharpened solid carbide numbered drill set includes 2 drills each of 25 sizes, covering #80 through #56. It is useful for careful carburetor jet tuning, checking, cleaning, and resizing work on brass carburetor jets and other small fuel-metering parts.

This D7 set is a good choice when you want a continuous small numbered-drill range with a backup drill in each size. The two-drills-per-size format is helpful because very small carbide drills are brittle and can break if bent, side-loaded, or forced.

Included Sizes – 50 Pieces Total

Includes 2 pieces each of the following 25 numbered drill sizes:

Specifications

• 50 pieces total
• 25 numbered drill sizes
• 2 drills per size
• Size range: #80 through #56
• Decimal range: .0135" through .0465"
• Factory resharpened solid carbide drills
• Standard 1/8" shank, also known as 3.175 mm
• 1.50" overall length
• Packaged in an indexed plastic storage case

Common Uses

• Carburetor jet tuning and careful jet resizing
• Main jet and pilot jet sizing work
• Motorcycle, scooter, kart, small-engine, and RC engine carburetors
• Mikuni, Keihin, Weber, Walbro-style, and similar small carburetor work
• Checking, matching, or stepping up numbered drill sizes
• Small precision holes in suitable materials

Factory Resharpened Solid Carbide Value

These are factory resharpened solid carbide drills, offering a practical lower-cost alternative to new carbide micro drills. They are professional-style micro drills with standard 1/8" shanks, intended for stable, accurate drilling setups where rigidity and precision matter.

Use note: Solid carbide drills are precision tools that require a stable setup. For best results, use a pin vise, drill press, milling machine, micro drill fixture, CNC machine, or other controlled holder that keeps the jet square to the drill. Avoid handheld electric drills, side pressure, bending, or forcing the drill.

Important Jet Tuning Note

Drilling a carburetor jet is a permanent modification. Increase size gradually and do not skip too far at once. Jet flow can depend on more than the hole diameter alone, including the entry shape, exit shape, and finish of the jet.

Frequently Asked Questions

Are these new drills?
No. These are factory resharpened solid carbide drills. They are a practical lower-cost alternative to new carbide drills.

Why choose this D7 set instead of the 20 Pc selected-size set?
Choose this D7 set if you want two drills in every included size and a continuous numbered-drill range from #80 through #56. The 20 Pc set is a smaller selected-size starter set.

Is this the best set for larger Holley, Rochester, Carter, or Quadrajet-style automotive jets?
Not usually. For larger automotive carburetor jet ranges, the HS1 .040"–.125" set is usually a better match.

Are these solid carbide or carbide tipped?
These are solid carbide micro drills, not carbide-tipped drills.

Can I use these by hand?
They can be used carefully in a pin vise or other controlled holder, but carbide drills are brittle. Keep the drill straight, use light pressure, and avoid side loading.

👉 View Carbide Drill Bit Feed & Speed Starting Guide