Norseman 43550 240-B Bright Finish 118deg HSS Drill Set 115 Piece
Magnum Super Premium drills substantially outperform cobalt drills in work hardening Stainless Steel applications. This performance advantage is the result of construction differences between the two types of drills. Cobalt drills, manufactured to Type J NAS 907 specs, have a very thick web. This web is necessary to limit breakage of the brittle cobalt steel. Magnum drills are made of special hi-moly tool steel, which is much tougher than cobalt steel. Magnum drills with their thin web will penetrate the work hardening stainless fast enough to continually cut beneath the chip which is hardening from deformation. This means the drill is cutting softer steel.
- 115 pc Set High Speed Steel Bright Finish Jobber - General Purpose 118-Degree Point
- 1/16 - 1/2 by 64ths, #1 - #60, A - Z 118-Degree Point
- High speed steel provides good wear resistance, can be used in general purpose applications for ferrous and nonferrous materials
- Bright finish increases chip flow in softer materials such as aluminum, wood and plastic
- Spiral flutes with a higher flute angle to remove chips more easily
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