Hertel SDD43274752 Step Drill Bit 9 Sizes Hss

Product Description

The HERTEL SDD43274752 is a high-speed steel step drill bit designed to drill multiple hole sizes with a single tool. It covers 9 hole sizes ranging from 1/4 inch to 3/4 inch in diameter, with each step measuring 1/8 inch in length. The 3/8 inch round shank features three flats to reduce slippage in standard drill chucks. The bright, uncoated finish is suitable for general-purpose use in sheet metal, electrical panels, and conduit work. Licensed electricians, HVAC technicians, and plumbers rely on step bits like this one when punching clean, sized holes through thin-gauge steel and aluminum without needing multiple drill sizes.

This step drill bit is well suited for trade work that requires precise hole sizing in thin materials such as electrical enclosures, junction boxes, HVAC sheet metal, and plumbing panels. The 9-step progression allows a single bit to cover a wide range of hole diameters commonly needed in residential and light commercial service work. The 1/8 inch step increments provide consistent sizing control without the need to change bits between passes.

Key Features

• High-speed steel construction for durability in metal drilling applications
• 9 hole sizes from 1/4 inch to 3/4 inch in 1/8 inch increments
• 3/8 inch round shank with 3 flats resists chuck slippage
• Bright uncoated finish for general-purpose use
• Single bit replaces multiple standard drill sizes for sheet metal work

Compatibility

Designed for use with standard 3/8 inch or larger keyed or keyless drill chucks. Suitable for drilling thin-gauge ferrous and non-ferrous metals typical in electrical, HVAC, and plumbing trade applications.

Installation Notes

Step drill bits are typically used by electricians, HVAC technicians, and plumbers when sizing knock-outs or access holes in sheet metal enclosures. Use at moderate drill speeds with consistent feed pressure to maintain clean step edges. Secure the workpiece firmly before drilling to prevent material from spinning. Inspect the bit for wear regularly, as dull steps can cause oversized or ragged holes.