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 set includes selected drill sizes commonly used for Model A Zenith carburetor jet service and comes organized in a compact storage case.

Each drill features a standard 1/8" shank. This set is a practical choice for carburetor jet work where a convenient group of commonly used sizes is helpful to keep on hand.

Included Sizes – 20 Pieces Total

Includes the following quantities and 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 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.

Common Uses

• Ford Model A Zenith carburetor jet tuning
• Main jet and idle jet service work
• Checking and resizing small carburetor jets and passages
• Keeping commonly used Zenith carburetor jet drill sizes organized in one set

Factory Resharpened Solid Carbide Value

These are factory resharpened solid carbide drills, offering performance comparable to new drills at a lower cost. They are professional-grade 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.

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

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

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.