Chicago-latrobe 47925 Cobalt Drill Bit Set 25 Pc

Product Description

The CHICAGO-LATROBE 47925 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, each bit in this Series 550 set delivers elevated heat resistance and edge retention when cutting hard metals, stainless steel, and abrasive alloys. The 135-degree split-point tip reduces walking on entry and requires no center punch on most surfaces. Bits are straight-shank with a 13 mm shank diameter and cover a metric range from 1 mm to 13 mm in 0.5 mm step increments. The set ships in a metal storage case. Weight is 2 pounds.

This set is suited for production and maintenance metalworking environments where a full metric size range is needed in a single kit. Typical applications include fabrication shops, industrial maintenance, plumbing rough-in through metal studs, electrical trade work through metal enclosures, and HVAC equipment assembly or field service requiring metric holes in steel, aluminum, and similar materials. The straight shank fits standard drill chucks. The jobber length geometry balances reach with rigidity for general-purpose through-hole drilling in flat stock, tube, and structural shapes.

Key Features

• Cobalt high-speed steel construction for extended tool life in hard and abrasive metals
• 135-degree split-point tip reduces entry walking and lowers thrust requirements
• Gold finish provides a visual wear indicator and mild lubricity benefit during cutting
• 25-piece metric set covers 1 mm to 13 mm in 0.5 mm increments
• Straight shank with 13 mm shank diameter fits standard 3-jaw drill chucks
• Metal storage case keeps bits organized and protected between uses

Compatibility

Designed for use in standard drill chucks accepting straight-shank bits up to 13 mm. Suited for metalworking and multipurpose drilling in steel, aluminum, cast iron, and similar materials as a Series 550 jobber length set.

Installation Notes

Drill bits in this set should be installed and operated by qualified tradespeople familiar with proper drilling technique for metal substrates. Secure the workpiece before drilling and use appropriate cutting fluid or lubricant when drilling hard metals to extend bit life and reduce heat buildup. Inspect bits for wear or chipping before each use, and retire any bit showing tip damage to avoid breakage. Follow applicable shop safety practices, including eye protection and secure workholding.