.0280"–.0330" Carbide Micro Drill Set, 50 Pc, 5 Sizes, 10 Each, 1/8" Shank | S5A

50-Piece Solid Carbide Micro Drill Bit Set – .0280" to .0330"

This 50-piece solid carbide micro drill bit set includes 10 drills each of 5 precision sizes ranging from .0280" through .0330". The concentrated size range is useful for PCB drilling, electronics work, CNC machining, prototyping, model making, precision repair, and other small-hole drilling applications where replacement drills in several closely spaced sizes are helpful.

Use the option selector to choose between Lightly Used Drills and Factory-Resharpened Drills.

• Lightly Used Drills: Previously used drills showing limited wear and offered as an economical tooling option.
• Factory-Resharpened Drills: Professionally resharpened drills with cutting edges restored to like-new cutting condition.

Included Sizes – 50 Pieces Total

Key Specifications

• Total quantity: 50 drills
• Number of sizes: 5
• Quantity per size: 10 drills
• Diameter range: .0280" to .0330"
• Material: Solid carbide
• Shank diameter: 1/8" (3.175 mm)
• Overall length: Approximately 1.50"
• Condition options: Lightly Used or Factory Resharpened
• Internal set number: S5A

Common Uses

• PCB and circuit-board drilling
• Electronics prototyping and repair
• Precision CNC drilling
• Model making and hobby machining
• Small-hole drilling in plastics, composites, brass, aluminum, and other suitable materials
• Maintaining replacement drills in several closely spaced micro sizes

Benefits

• Ten drills of each size provide useful replacements for production or repeated work
• Closely grouped sizes from .0280" through .0330"
• Includes metric, numbered, decimal-inch, and fractional size references
• Standard 1/8" shanks fit many PCB drill holders, CNC collets, and precision setups
• Choice of economical lightly used drills or factory-resharpened drills

Because these drills are lightly used or factory resharpened, flute lengths, point geometry, ring colors, manufacturers, and cosmetic appearance may vary. The listed cutting diameters and quantities define the included assortment.

Important Use Note

Solid carbide drills are rigid and wear resistant, but they are also brittle. Use a stable, low-runout holder such as a CNC spindle, drill press, mill, micro-drill fixture, or other controlled setup. Keep the drill aligned with the work and avoid side pressure, bending, or forcing the tool.

👉 View Carbide Drill Bit Feed & Speed Starting Guide