Silver and Deming Drills

The Versatile Precision Twist Drill SD Drills

The general purpose drill line from Dormer Pramet includes the market-leading Precision Twist Drill brand of Silver & Deming drills. These reduced shank drills deliver versatility and reliability.

The Precision Twist Drill R56 features a ½ inch diameter round shank suitable for use with ½ inch chuck portable drills. The common flute and overall length allows for minimal adjustments for drill presses. It is ideal for drilling a wide range of materials of low to medium tensile strength.

The Precision Twist Drill R57 features 3 flats on the ½ inch diameter shank for a more positive non-slip hold.

The Precision Twist Drill R56CO is manufactured from premium cobalt steel for increased hardness, wear resistance and heat resistance. It features a 118° self-centering split point for accurate positioning and easier penetration. The R56CO is the ideal drill for tough, high tensile strength materials that generate higher cutting temperatures, such as high alloy steels, ferrous castings, stainless and other difficult to machine materials.

The Precision Twist Drill S&D drills will be showcased on booth W-2464 at IMTS in Chicago, along with the Pramet, Dormer and Union Butterfield branded-products. Learn more about your winning combination at

About Dormer Pramet:

Dormer Pramet is a manufacturer of solid and indexable drilling, milling, threading and turning tools for the general engineering sector. Market-leading brands include Precision Twist Drill (PTD), Union Butterfield, Master, Dormer and Pramet. With best-in-class training, support and logistics services, Dormer Pramet has become the reliable one-stop-shop for general purpose and multi-application cutting tools. Visit us at

Miriam Metcalfe

Marketing Manager

Dormer Pramet

2511 Technology Drive

Suite 113/114

Elgin, IL  60124


Office: +1 847-783-5713

Mobile: +1 630-488-6091

Fax: +1 847-783-5760

Phil McFadden

Cell:  847-708-4234

Fax:  630-923-8293

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