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 contains 12 selected numbered drill sizes for Ford Model A Zenith carburetor jet checking, cleaning, matching, and careful resizing work.

Unlike a general micro-drill assortment, this kit is configured specifically around small drill sizes useful for Ford Model A Zenith carburetor service. Several sizes are supplied in duplicate or triplicate, giving you backup drills in some of the sizes used most heavily in this assortment.

Included Sizes – 20 Pieces Total

Specifications

• 20 drills total
• 12 selected numbered drill sizes
• Selected diameter range: .0200" through .0550"
• Factory resharpened solid carbide drills
• Standard 1/8" (3.175 mm) shanks
• Two protective storage cases included
• Colored size-identification rings; ring colors may vary
• SKU: CDS103

Best For

• Ford Model A Zenith carburetor jet service
• Checking and matching existing jet openings
• Cleaning blocked or restricted jet passages
• Careful enlargement of suitable brass carburetor jets
• Main, idle, and related metering-jet work when the required diameter matches an included drill size

Factory Resharpened Solid Carbide

These are factory resharpened solid carbide drills. They are not new drills. Factory resharpening provides a practical lower-cost way to obtain precision carbide micro drills for applications where the included sizes are suitable.

These are full 1/8" shank solid-carbide micro drills rather than flexible hobby-style wire drill assortments.

Use note: Solid carbide is extremely hard and wear resistant, but it is also brittle. Use a pin vise, drill press, milling machine, micro-drill fixture, CNC machine, or other controlled holder that keeps the drill straight. Avoid side pressure, bending, forcing the drill, or using the drill like a reamer.

Important Carburetor Jet Information

Carburetor jet numbering does not always correspond directly to physical bore diameter, and specifications can vary by carburetor design and application. Verify the actual diameter required before modifying a jet.

Drilling a jet is a permanent modification. Increase the opening gradually. Fuel flow may also be influenced by the shape, length, entry, exit, and surface finish of the metering passage, not only its diameter.

Frequently Asked Questions

Are these new drills?
No. These are factory resharpened solid carbide drills.

Is this kit intended for Ford Model A Zenith carburetors?
Yes. The assortment contains selected drill sizes intended for Ford Model A Zenith carburetor jet service where the required opening corresponds to one of the included sizes.

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

Why are some sizes duplicated?
Several sizes are supplied with two or three pieces, providing backup drills in those sizes.

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

Can these be used by hand?
Yes, carefully in a pin vise or other controlled holder. Keep the drill straight, use light pressure, and avoid side loading.

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