Chicago-latrobe 54127 Cobalt Drill Bit Set 25 Pc

Product Description

The CHICAGO-LATROBE 54127 is a 25-piece cobalt jobber length drill bit set designed for metalworking and multipurpose drilling applications. Built from cobalt high-speed steel with a gold finish, these bits handle hard and abrasive materials where standard HSS tooling falls short. The 135-degree split-point tip reduces walking on entry and requires no center punch on most surfaces. Bit sizes span 0.0394 inches to 0.5118 inches in 0.5 mm step increments, covering a full metric progression of 25 sizes. The straight shank fits standard keyless and keyed chucks. The set arrives in a metal storage case. Machinists, pipefitters, and maintenance technicians are the primary users of this tooling.

The 54127 is suited for metalworking and multipurpose drilling in both shop and field environments. The metric size progression makes it a direct fit for operations that spec hole sizes in millimeters, including fabrication, mechanical assembly, and HVAC or plumbing rough-in work requiring precisely sized clearance holes through metal framing or equipment panels. The cobalt construction holds an edge longer than standard HSS at elevated cutting temperatures, making it appropriate for stainless steel, cast iron, and other work-hardening alloys. The full 25-piece metric range from 1 mm to 13 mm reduces the need for multiple individual bit purchases.

Key Features

• Cobalt steel construction resists heat and wear when drilling hard metals and alloys
• 135-degree split-point tip self-centers on entry and reduces thrust force
• Gold finish provides visual wear indicator and light lubricity
• 25-piece metric set covers 1 mm to 13 mm in 0.5 mm increments
• Straight shank compatible with standard drill chucks
• Metal storage case organizes and protects all 25 bits
• Right-hand cutting direction; jobber length for general-purpose reach

Compatibility

Designed for use in standard keyed and keyless drill chucks accepting straight shanks up to 13 mm diameter. Suitable for benchtop drill presses, handheld power drills, and magnetic base drills used in metalworking and multipurpose drilling applications.

Installation Notes

Secure the workpiece before drilling and use appropriate cutting fluid when drilling hard or stainless alloys to extend bit life and reduce heat buildup. Ensure the chuck is fully tightened on the shank before operation. Wear appropriate eye protection per applicable shop safety standards. Inspect each bit for chipping or wear before use; a damaged split point will increase thrust and reduce hole quality.