Carburetor Jet Drill Set #75–#51 – 25 Pc Solid Carbide, 1/8" Shank CDS101

Carburetor Jet Drill Set – 25 Piece #75–#51

This 25-piece factory resharpened solid carbide numbered drill set includes 1 drill each from #75 through #51. It is intended for careful carburetor jet checking, cleaning, matching, and resizing work where a continuous numbered-drill range is useful.

This set is a good choice when you want a broader numbered-drill range than a small selected-size set, but do not need duplicate backup drills in each size.

Included Sizes – 25 Pieces Total

Includes 1 piece each of these numbered drill sizes:

• #75 — .0210"
• #74 — .0225"
• #73 — .0240"
• #72 — .0250"
• #71 — .0260"
• #70 — .0280"
• #69 — .0292"
• #68 — .0310"
• #67 — .0320"
• #66 — .0330"
• #65 — .0350"
• #64 — .0360"
• #63 — .0370"
• #62 — .0380"
• #61 — .0390"
• #60 — .0400"
• #59 — .0410"
• #58 — .0420"
• #57 — .0430"
• #56 — .0465"
• #55 — .0520"
• #54 — .0550"
• #53 — .0595"
• #52 — .0635"
• #51 — .0670"

Specifications

• 25 pieces total
• 25 numbered drill sizes
• 1 drill per size
• Size range: #75 through #51
• Decimal range: .0210" through .0670"
• Factory resharpened solid carbide drills
• Standard 1/8" shank, also known as 3.175 mm
• Short precision micro-drill design
• Packaged in a protective plastic case
• Size index included for easy identification

Common Uses

• Brass carburetor jet resizing
• Main jet and pilot jet tuning
• Small engine carburetor work
• Motorcycle, scooter, kart, ATV, go-kart, and RC engine carb tuning
• 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.

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

Use note: 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. For the most exact fuel-flow work, remember that 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, offering a practical lower-cost alternative to new carbide drills.

Are these for enlarging brass carburetor jets?
Yes. These drills are commonly used for careful resizing of brass carburetor jets in motorcycles, karts, small engines, scooters, RC engines, and similar carburetor work.

Are these numbered drill sizes?
Yes. This set includes numbered drill sizes #75 through #51.

How many drills are included?
This set includes 25 drills total: 1 piece each of 25 numbered sizes from #75 through #51.

Does this set include backup drills?
No. This set includes one drill per size. If you want backup drills in each size, choose the D7 #80–#56 set, which includes two drills per size.

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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