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25PCS HSS Twist Fully Ground Drill Bit

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Product Description

Basic Information

Model NO.

CNTN00008

Length

Jobber-length

Type

Twist Drill Bit

Material

High Speed Steel

Usage

Metal Drilling

Weight

1.08kg

Dimensions

180X170X60 mm

Surface

Bright Treatment

Package

ABS Box

Origin

China

Properties & Benefits

Drilling of ordinary steels.

Split-point grinding: Reduction of the drill tip. Enables simple self-centring on smooth surfaces and reduces axial load.

118° tip: Ideal angle for efficient sharpening and general use in materials with long shavings.

Cylindrical shank: Diameter of the shank matches the tip, allowing versatile use on portable tools and CNC machines.

30° type N flute: Normal flute profile with a 30° helix angle for good rigidity and excellent drilling precision.

High-speed steel (HSS): High-quality substrate for general use in steels and cast irons up to 950 N/mm².

Available Sizes

Ø 1 - 1.5 - 2 - 2.5 - 3 - 3.5 - 4 - 4.5 - 5 - 5.5 - 6 - 6.5 - 7 - 7.5 - 8 - 8.5 - 9 - 9.5 - 10 - 10.5 - 11 - 11.5 - 12 - 12.5 - 13 mm

Features & Application

Widely Used In Industry

Frequently Asked Questions

What materials are these HSS drill bits suitable for?

These High-Speed Steel (HSS) drill bits are designed for general use in steels and cast irons with a tensile strength up to 950 N/mm². They are particularly effective for drilling ordinary steels.

What is the advantage of the 118° tip angle?

The 118° tip angle is optimized for general-purpose drilling, especially in materials that produce long shavings. It allows for rapid material attachment and simplified centring.

Do I need a center punch before using these bits?

Thanks to the split-point grinding, these bits are self-centring even on smooth surfaces. This significantly reduces the need for pre-marking and lowers the required axial load during drilling.

Can these be used with handheld power tools?

Yes, the cylindrical shank design ensures that the bits are compatible with both portable electrical tools and professional CNC machine tools.

What does the 30° helix angle provide?

The 30° type N flute profile provides excellent tool rigidity and ensures high drilling precision while effectively clearing debris during the drilling process.