Dormer High Speed Steel Jobber Drill Bits 9mm Diameter, 125mm Overall Length, 10 Pieces A1089.0

Dormer A1089.0 High Speed Steel Jobber Drill Bits set features a pack of 10 precision-engineered drill bits, each with a diameter of 9mm and an overall length of 125mm. Designed for accuracy and durability, these drill bits are manufactured from premium-grade tempered high speed steel (HSS) that withstands high temperatures encountered during drilling operations. The 135° split-point design offers excellent positional accuracy and reduces the tendency for the drill to wander on surface contact.

The helix of each drill bit is designed for superior stiffness and efficient chip evacuation, improving drilling speed and finish quality. These bits are optimized for drilling tough materials including austenitic stainless steel, cast steel, grey and malleable cast irons, nickel-brass, aluminum alloys, plastics, and graphite. They are not recommended for masonry applications.

The cylindrical straight shank with a 9mm diameter offers excellent grip in both hand and machine drilling tools. The blue surface treatment provides additional rust resistance, enhancing longevity in demanding industrial environments. The drill bits conform to international standards BS 328, DIN 338 RN, and ISO 235, ensuring reliable and standardized performance in professional settings.

Premium tempered HSS construction for durability and heat resistance. 135° split-point for precise centering and reduced walking. Optimized helix design for efficient chip removal and rigidity. Versatile use in various metals, plastics, and composite materials.

Compliant with BS 328, DIN 338 RN, ISO 235 standards. Suitable for both hand and machine drilling applications. Blue surface finish for corrosion resistance. Includes clear size markings for easy identification. Set contains 10 pieces, all 9mm diameter, 125mm overall length.

This Dormer HSS drill bit set is an essential toolset for workshops, manufacturing lines, and construction sites requiring reliable and precise drilling in multiple materials. The set offers professional-grade quality suitable for industrial, mechanical, and maintenance applications.

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