Ford Model A Zenith Carburetor Jet Drill Kit – 20 Pc Factory Resharpened Carbide, 1/8" Shank CDS-103

Ford Model A Zenith Carburetor Jet Drill Kit – 20 Piece

This 20-piece factory resharpened solid carbide drill kit is intended for careful Ford Model A Zenith carburetor jet tuning, checking, and resizing work. The kit includes selected numbered drill sizes commonly used for Model A Zenith carburetor jet service and comes organized in a compact storage case.

This kit is different from the general carburetor jet drill sets because it is application-focused for Ford Model A Zenith carburetor work, with extra pieces of several commonly used small numbered drill sizes.

Included Sizes – 20 Pieces Total

Includes the following quantities and numbered drill sizes:

• 1 × #54 — .055"
• 1 × #60 — .040"
• 1 × #61 — .039"
• 1 × #62 — .038"
• 1 × #63 — .037"
• 3 × #64 — .036"
• 3 × #65 — .035"
• 1 × #67 — .032"
• 2 × #70 — .028"
• 2 × #74 — .0225"
• 2 × #75 — .021"
• 2 × #76 — .020"

Specifications

• 20 pieces total
• 12 selected numbered drill sizes
• Factory resharpened solid carbide drills
• Standard 1/8" shank
• Organized storage case included
• Reference image shows drill style and dimensions only; actual included sizes are listed above.

Best For

• Ford Model A Zenith carburetor jet service
• Main jet and idle jet checking
• Careful Zenith carburetor jet resizing
• Keeping commonly used Model A Zenith drill sizes together in one kit
• Users who want backup drills in several commonly used small sizes

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.

Unlike lightweight hobby-style wire drill assortments, these are solid carbide micro drills with full 1/8" shanks and are packaged in an organized storage case for convenient size selection.

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, 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 Zenith carburetor jets is a permanent modification. Verify the required size for your Ford Model A carburetor before drilling, and increase size gradually. For the most exact fuel-flow work, remember that performance can depend on more than 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, offering performance comparable to new drills at a lower cost.

Is this kit intended for Ford Model A Zenith carburetors?
Yes. This kit is configured around selected sizes commonly used for Ford Model A Zenith carburetor jet service work.

How many drills are included?
This kit includes 20 drills total across 12 selected numbered sizes.

Why are there duplicates of some sizes?
Several commonly used small sizes are included in duplicate or triplicate because very small carbide drills are brittle and it can be useful to have backups.

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.

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