Sterling by McDonough Model DG Drill Grinder | 1/8" - 2.5" Capacity | 1/2HP 115V

Sterling by McDonough Model DG Drill Grinder

Model: DG | Motor: 1/2 HP | Capacity: 1/8" to 2-1/2" Drills

Overview

The Sterling McDonough DG is a professional-grade drill sharpener designed for high-accuracy grinding of 2, 3, and 4-flute twist drills. Featuring a 1/2 HP, 3,450 RPM motor, this unit is optimized for precision toolroom use, providing enough torque to maintain consistent spindle speeds during the sharpening process. Its standout feature is the V-block holding system, which eliminates the need for expensive collet sets and allows an operator to switch from a 1/8" bit to a 2-1/2" bit in seconds.

Technical Specifications

• Drill Capacity: 1/8" to 2-1/2" Diameter.
• Flute Range: Sharpens 2, 3, and 4-flute drills.
• Included Angles: Variable adjustment from 90° to 140°.
• Motor: 1/2 HP Industrial Motor (typically 115V Single-Phase or 230/460V 3-Phase).
• Grinding Wheel: 6" Straight Cup Wheel (Standard 70-Grit Aluminum Oxide).
• Infeed Control: Micrometer head for ultra-precise material removal.
• Construction: Heavy cast-iron swing arm and base for maximum rigidity.

Key Performance Features

• Simplicity & Speed: The V-block and tailstock design is "self-centering," meaning there are no chucks or collets to swap. This significantly reduces downtime in shops that sharpen a wide variety of drill sizes.
• Versatile Point Geometry: Easily adjust for different materials by changing the included angle, from 90° for soft plastics to 140° for hardened stainless steel.
• Integrated Dressing: Includes a built-in diamond wheel dresser to ensure the cup wheel face remains perfectly flat, which is critical for achieving a perfectly centered drill point.
• Compact Footprint: Often pedestal-mounted, the DG model provides industrial-scale capacity without taking up the floor space of larger cylindrical grinders.