Dormer High Speed Steel, 158 mm Overall 21 mm

RS Stock No.:: 230-5820
Mfr. Part No.:: A17021.0
Brand:: Dormer

Dormer High Speed Steel, 158 mm Overall 21 mm

Subtotal (1 unit)*

$163.90

(exc. GST)

$180.29

(inc. GST)

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In Stock

Plus 5 unit(s) shipping from 09 February 2026

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Units	Per unit
1 +	$163.90

*price indicative

RS Stock No.:: 230-5820
Mfr. Part No.:: A17021.0
Brand:: Dormer

Specifications

Technical data sheets

Legislation and Compliance

Product Details

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	Dormer
	Product Type	Drill Bit
	Material	High Speed Steel
	Number of Flutes	2
	Overall Length	158mm
	Flute Type	Helical
	Shank Type	Reduced Cylindrical
	Finish	Steam Oxide
	Drilling Length	82mm
	Cutting Direction	Right
	Shank Size	12.7 mm
	Coolant Through	Yes
	Drill Point Angle	118°
	Drill Bit Size	21 mm
	Standards/Approvals	No

	Select all
	Brand Dormer
	Product Type Drill Bit
	Material High Speed Steel
	Number of Flutes 2
	Overall Length 158mm
	Flute Type Helical
	Shank Type Reduced Cylindrical
	Finish Steam Oxide
	Drilling Length 82mm
	Cutting Direction Right
	Shank Size 12.7 mm
	Coolant Through Yes
	Drill Point Angle 118°
	Drill Bit Size 21 mm
	Standards/Approvals No

RoHS Status: Exempt

Dormer A170 Series Drill Bit, HSS, Twist - A17021.0

This Dormer twist drill bit with a 21mm diametre is a versatile tool designed for various applications in automation, electronics, electrical, and mechanical industries. Made from high-speed steel (HSS) and suitable for drilling stainless steel, this drill bit offers exceptional durability and long-lasting performance. Whether you're working with tough materials or intricate projects, the Dormer twist drill bit is the reliable solution you need.

Features & Benefits

• Constructed from high-speed steel (HSS) for durability and longevity

• Suitable for drilling stainless steel with precision

• 118° point angle for easy regrinding and maintenance

• Steam tempered finish prevents chip to tool welding

• 21mm diametre ideal for a wide range of drilling applications

Applications

• Used for drilling stainless steel components in the automotive industry

• Ideal for creating precise holes in electrical enclosures and panels

• Suitable for fabricating metal brackets and supports in mechanical systems

Can it handle drilling through hardened steel?

Yes, the Dormer twist drill bit is designed to drill through hardened steel with ease.

Will it maintain its sharpness after extended use?

Yes, thanks to the steam tempered finish, this drill bit retains its sharp edge for prolonged use.

Is it suitable for use in automated drilling machines?

Yes, the Dormer drill bit is compatible with automated drilling machines for efficient and precise operations.