Hertel SD63361729 Step Drill Bit 9-step 1/4 to 3/4 in

Product Description

The HERTEL SD63361729 is a 9-step high-speed steel step drill bit designed for drilling multiple hole sizes with a single tool. Built from M2 HSS with a black oxide finish, it covers hole diameters from 1/4 inch through 3/4 inch in 1/16-inch increments. The cylindrical shank measures 1/4 inch in diameter and features two flats for secure chuck engagement. At 2-3/16 inches overall length and 0.12 pounds, it is sized for compact access in panels, enclosures, and sheet metal. HVAC technicians, electricians, and plumbers use this bit when they need a range of hole sizes without swapping tools repeatedly.

This step drill bit is rated for general-purpose, multipurpose applications in thin materials including sheet metal, electrical panels, junction boxes, plastic enclosures, and light-gauge steel. It is well-suited for trade professionals who drill knockout holes for conduit, pipe stubs, or control wiring entry points during installation and service work. The straight flute geometry and black oxide coating help manage heat and chip clearance in these common trade scenarios.

Key Features

• 9 hole sizes from 1/4 inch to 3/4 inch in 1/16-inch step increments
• M2 high-speed steel construction for durability in general-purpose drilling
• Black oxide coating reduces friction and provides corrosion resistance
• 1/4-inch cylindrical shank with 2 flats for quick-change chuck compatibility
• Straight flute design aids chip evacuation in thin-material applications
• Compact 2-3/16-inch overall length suits confined work areas

Compatibility

Designed as a general-purpose step drill bit compatible with standard 3-jaw chucks and quick-change drill drivers accepting a 1/4-inch cylindrical shank with flats.

Installation Notes

Step drill bits are typically used by electricians, HVAC technicians, and plumbers for cutting holes in sheet metal and thin panels. Always de-energize and lock out electrical panels before drilling near live components. Use a center punch to prevent bit walking on smooth metal surfaces. Apply light, consistent feed pressure to avoid overheating the cutting edges, and allow the bit to cool between extended use cycles.