The A100 is the deliverable and widely tested short twist drill for general applications. The A100 is recognizable by the famous silver ring where the size indication is clearly legible. The A100 HSS DIN338RN twist drill is precision ground to achieve good hole quality and reliable stand time in general applications. The steam-releasing (black) surface holds better coolants and lubricants in favor of the lifetime and quality of the hole.

Dormer Jobber Length Drill Bit, Type N General Purpose, Series: A100, Imperial/Metric, 0.25 mm Drill - Metric, 0.0098 in Drill - Decimal Inch, 19 mm Overall Length, 4XD Cutting Depth, 2 Flutes, Spiral Flute, 3 mm Flute Length, Straight Shank, 118 deg Point, Self-Centering/Split Point, Right Hand Cutting Direction, HSS Cutting Edge, No Through Coolant, HSS, Steam Tempered, Dark Gray, Applicable Materials: Plain Carbon Steel, Alloy Steel, Lamellar Graphite, Titanium, Alloyed and Cermet

• High speed steel (HSS) provides good wear resistance and can be used in general purpose applications for both ferrous and non-ferrous materials
• Oxide prevents chip building, galling and welding on the workpiece
• It is commonly used on low carbons, stainless steel and ferrous metals
• Spiral flutes are constructed with a higher flute angle to remove chips more easily regular helix form tapered web configuration
• No coolant channel

• Catalog https://assets.unilogcorp.com/2/ITEM/DOC/Dormer_0000496_Catalog.pdf