HRC45 Solid Carbide 90 Degree Spot Drill Bits | Precision Centering & Chamfering Tools

The HRC45 Solid Carbide 90 Degree Spot Drill Bits are precision-engineered drilling tools designed for high-accuracy hole initiation in metalworking applications. Ideal for CNC machining, aerospace manufacturing, and automotive production, these spotting drill bits prevent drill walking and ensure exact hole placement. By creating a precise indentation that matches the angle of your regular drill bit, they protect workpieces from damage and improve overall machining efficiency.

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Key Features

Premium Solid Carbide Material – Made from tungsten carbide with HRC45 hardness for exceptional wear resistance and longevity.
90-Degree Angle – Matches standard drill bit angles for perfect centering and chamfering in one operation.
2-Flute Design – Provides balanced cutting action and smooth chip evacuation.
Versatile Material Compatibility – Suitable for general steel, alloy steel, tempered steels, cast iron, aluminum alloy, copper, brass, magnesium alloy, and zinc alloy.
Custom Coating Available – Uncoated options in stock; various coatings (e.g., TiN, TiCN, TiAlN) available upon request to enhance tool life and performance.
Precision Ground – Tolerance-controlled to ensure yaw less than 0.01mm for high-accuracy applications.

Technical Specifications

Parameter	Details
Material	Solid Tungsten Carbide
Hardness	HRC45
Angle	90 Degrees
Flute Count	2
Coating	Customized (Uncoated in stock)
Brand	MSK

Available Dimensions

Diameter (mm)	Flute	Total Length (mm)	Angle	Shank Diameter (mm)
3	2	50	90°	3
4	2	50	90°	4
5	2	50	90°	5
6	2	50	90°	6
8	2	60	90°	8
10	2	75	90°	10
12	2	75	90°	12

Custom diameters and lengths available on request.

Applications

These 90-degree spot drill bits are essential for:

✅ CNC Precision Drilling – Prevents bit wandering on automated machines
✅ Aerautics & Aviation Manufacturing – High-stakes applications demanding zero error
✅ Automotive Parts Production – Consistent hole starting for engine and chassis components
✅ Mold & Die Making – Accurate centering for complex mold geometries
✅ General Lathe Processing – Improves hole quality in turned parts
✅ Electrical Manufacturing – Clean chamfers for enclosure and component holes

How to Use (Important Notes)

For centering and chamfering only – Do not use for through-hole drilling. This tool is designed for spot drilling and chamfering operations.
Check tool runout – Verify yaw before use. If deviation exceeds 0.01mm, correct or replace the tool.
Select correct size – For a 5mm finished hole, choose a 6mm spot drill. This prevents deflection during subsequent drilling and produces a 0.5mm chamfer in one pass.

Why Choose MSK Spot Drills?

Efficiency – Combines centering and chamfering in one operation, reducing cycle time.
Precision – Eliminates drill walking for perfectly positioned holes.
Versatility – Works on ferrous, non-ferrous, and hardened materials.
Customization – Coatings and non-standard sizes available to meet specific needs.

Packaging & Shipping

Secure packaging to prevent damage during transit
Global shipping available from our ISO-certified facility
Bulk order discounts available – contact us for quote

Contact Us for Custom Solutions

Need a special coating, diameter, or length? Our engineering team can customize these spot drill bits for your specific application. Fill out the form below or email us directly.