Hertel SDD43274786 Step Drill Bit Cobalt 12 Hole Sizes

Product Description

The HERTEL SDD43274786 is a cobalt step drill bit designed for drilling multiple hole sizes in a single tool. With 12 hole sizes ranging from 6 mm to 37 mm minimum and maximum diameters, it eliminates the need to swap bits when stepping through progressively larger holes. The 13 mm round shank with three flats resists rotation in the chuck, and the 4 mm step length provides controlled, incremental cutting. A bright uncoated finish is standard. This bit is suited for metalworking applications and is typically used by machinists, maintenance technicians, and fabricators working with sheet metal, tubing, and structural stock.

This step drill bit is built for trade and industrial use where a wide hole-size range is required without changing tools. It performs well in sheet metal, thin plate, and similar materials where step drilling is standard practice. The cobalt construction handles harder workpiece materials and elevated cutting temperatures better than standard high-speed steel, making it a practical choice for demanding production or field maintenance environments where bit longevity matters.

Key Features

• Cobalt tool material for improved heat resistance and durability in hard materials
• 12 hole sizes in a single bit, covering 6 mm to 37 mm diameter range
• 13 mm round shank with 3 flats prevents slipping in the chuck
• 4 mm step length for controlled, incremental hole sizing
• Bright uncoated finish with no additional coating to chip or peel

Compatibility

Designed as a general-purpose step drill bit for use in drill presses and hand drills with compatible chuck sizes; fits applications requiring holes from 6 mm to 37 mm in sheet metal, thin plate, and similar workpieces.

Installation Notes

Installation is performed by machinists, fabricators, or maintenance technicians using a standard drill press or hand drill. Secure the shank firmly in a chuck sized to accept the 13 mm diameter before use. Always wear appropriate eye protection and secure the workpiece before drilling. Reduce feed pressure as the bit approaches final hole diameter to maintain step accuracy and extend bit life.