Hertel SDD40565111 Step Drill Bit Set 6 Pc Hss

Product Description

The HERTEL SDD40565111 is a 6-piece step drill bit set made from high-speed steel with a black oxide coating. It covers a size range from 1/8 inch up to 1-1/8 inch and includes 22 individual hole sizes across the six bits. Step increments are 1/32 inch on the smaller bits and 1/16 inch on the larger bits, giving technicians precise control when drilling through sheet metal, electrical panels, conduit knockouts, HVAC cabinets, and similar thin-material applications. All bits feature a 3-flat shank design to prevent slipping in the chuck, and cutting direction is right hand. The set weighs 1.47 pounds.

This set is suited for metalworking and multipurpose drilling tasks in residential and light commercial service environments. Electricians, HVAC technicians, and plumbers commonly use step drill bits when enlarging or creating clean-edged holes in sheet metal enclosures, junction boxes, equipment panels, and pipe chase covers. The range of sizes in this set allows a single technician to handle the majority of common knockout and pilot-hole tasks without switching to a chassis punch or hole saw for standard diameters up to 1-1/8 inch.

Key Features

• 6-piece set covering 22 hole sizes from 1/8 inch to 1-1/8 inch
• High-speed steel construction with black oxide finish for heat and corrosion resistance
• 3-flat shank on 1/4 inch and 3/8 inch shanks prevents chuck slip
• Step increments of 1/32 inch and 1/16 inch for precise size control
• Conventional point geometry for clean entry on sheet metal and thin stock
• Right-hand cutting direction compatible with standard drill drivers and drill presses

Compatibility

Designed for metalworking and multipurpose drilling applications in inch-measurement systems. Compatible with standard 3-jaw chucks accepting 1/4 inch and 3/8 inch shanks. Set includes: 13-step bit 1/8 inch to 1/2 inch by 1/32 inch increments, 12-step bit 3/16 inch to 7/8 inch by 1/16 inch increments, 2-step bit 3/8 inch and 1/2 inch, 1-step bit 7/8 inch, 9-step bit 1/2 inch to 1 inch by 1/16 inch increments, and 2-step bit 7/8 inch and 1-1/8 inch.

Installation Notes

Step drill bits are typically used by electricians, HVAC technicians, and plumbers working on sheet metal and enclosure panels. Always de-energize electrical equipment and lock out power before drilling into any panel or enclosure per NFPA 70E lockout-tagout procedures. Use cutting fluid or lubricant on harder stock to extend bit life and reduce heat buildup. Inspect each bit for wear or chipping before use and replace any bit that shows damage to avoid irregular hole sizes.