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Drill Bits for Hardened Alloy Steel
HSS drill bits provide a practical balance of hardness, toughness, and cost.
135° split point is self-centering without wandering on hardened alloy steel.
HSS options are suitable for daily drilling in steel, aluminum, wood, and plastic.
Accurate grinding helps the drill run more smoothly with less vibration..
Suitable for OEM drill bit programs with customized packaging and size selection.
Trusted by Global Brands
OEM Partner for Industry Leaders
Customization & Packaging
Complete OEM/ODM solutions tailored to your brand requirements
Build Your Own Brand with Custom Drill Bits for Hardened Alloy Steel
- Custom Packaging Options: Blister, color box, bulk pack— flexible for different sales models
- Shank Type Customization:Straight shank / reduced shank / 1/4" hex / three-flat shank — fit different tool systems
- Material Selection: HSS 4241 / 4341 / 6542 / M35 / M42 — tailored to price and performance
- Low MOQ: MOQ from 100 pcs — support quick market validation
Application Notes
Discover the versatile applications and material compatibility of our products
Drilling PVC
- •These double-ended drill bits feature sharp fine cutting edges to drill PVC smoothly. Efficient flute design clears chips quickly without cracking or chipping the plastic. It creates neat, burr-free round holes with stable, clean cutting performance every time.
Drilling Hardened Alloy Steel
- •Made with premium high-strength material, the bits easily handle hardened alloy steel. Special tip geometry resists high heat, wear and breakage. It maintains steady penetration for precise round holes, ideal for heavy-duty hard metal drilling tasks.
Drilling Iron
- •Optimized for iron material drilling, the dual-end design offers strong cutting force and great toughness. It removes iron scraps rapidly to avoid clogging and overheating. Delivers smooth, accurate holes with long-lasting sharpness for daily iron processing.
Real Factory & Application Videos
Watch real manufacturing and field applications to verify quality, performance, and supply capability
Want Drill Bits Suitable for Wood, Plastic, and Metal?
A flexible twist drill bit range helps wholesalers cover more daily drilling needs.
Are You Building a Private Label Drill Bit Line?
OEM support includes logo marking, packaging design, size selection, and material matching.
Need Quick-Change Drill Bits for Fast Work?
Hex shank twist drill bits support faster bit changes and better compatibility with quick-change holders.
Our Production Process
From raw materials to finished products, every step is meticulously controlled to ensure superior quality and precision.
Raw Material Cutting
Heat Treatment
Coarse Grinding
Shank Grinding
Flute Edge Grinding
Fine Grinding
Double Angle
Angle Grinding
Sharping Edge
International Certifications
Our products meet the highest international standards and are certified by leading quality organizations worldwide.
RoHS Certificate
• Expiry Date:2027.10.05
ISO 9001:2015
• Expiry Date:2028.10.05
SGS Audit Report
• Expiry Date:2028.01.05
Product Spec Table
| SKU | Key Specs | Material / Coating | Packaging |
|---|---|---|---|
| 1/64"/0.5mm | 12mm Flute Length / 34mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 3/64"/1.0mm | 12mm Flute Length / 34mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 1/16"/1.5mm | 20mm Flute Length / 43mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 5/64"/2.0mm | 24mm Flute Length / 49mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 3/32"/2.5mm | 30mm Flute Length / 57mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 7/64"/3.0mm | 33mm Flute Length / 61mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 9/34"/3.5mm | 39mm Flute Length / 70mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 5/32"/4.0mm | 43mm Flute Length / 75mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 11/64"/4.5mm | 47mm Flute Length / 80mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 3/16"/5.0mm | 52mm Flute Length / 86mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 7/32"/5.5mm | 57mm Flute Length / 93mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 15/64"/6.0mm | 57mm Flute Length / 93mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 1/4"/6.5mm | 63mm Flute Length / 101mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 17/64"/7.0mm | 69mm Flute Length / 109mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 9/32"/7.5mm | 169mm Flute Length / 101mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 5/16"/8.0mm | 75mm Flute Length / 117mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 21/64"/8.5mm | 75mm Flute Length / 117mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 11/32"/9.0mm | 81mm Flute Length / 125mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 3/8"/9.5mm | 81mm Flute Length / 125mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 25/64"/10.0mm | 87mm Flute Length / 133mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 13/32"/10.5mm | 87mm Flute Length / 133mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 27/26"/11mm | 94mm Flute Length / 142mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 7/16"/11.5mm | 94mm Flute Length / 142mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 15/32"/12mm | 101mm Flute Length / 151mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 31/64"/12.5mm | 101mm Flute Length / 151mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 1/2"/13.0mm +mm | 101mm Flute Length / 151mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 17/32"/13.5mm | 108mm Flute Length / 160mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 9/16"/14.0mm | 108mm Flute Length / 160mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 37/64"/14.5mm | 114mm Flute Length / 169mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 19/32"/15.0mm | 114mm Flute Length / 169mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 39/64"/15.5mm | 120mm Flute Length / 178mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 5/8"/16.0mm | 120mm Flute Length / 178mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 21/32"/16.5mm | 125mm Flute Length / 184mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 43/64"/17.0mm | 125mm Flute Length / 184mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 11/16"/17.5mm | 130mm Flute Length / 191mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 45/64"/18.0mm | 130mm Flute Length / 191mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 47/64"/18.5mm | 135mm Flute Length / 198mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 3/4"/19.0mm | 135mm Flute Length / 198mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 49/64"/19.5mm | 140mm Flute Length / 205mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
| 25/32"/20.0mm | 140mm Flute Length / 205mm Overall Length | M35/M42 Body Material/Custom Coated | Plastic Box/Paper Box/Customization |
Frequently Asked Questions
Everything you need to know about our products, customization options, and ordering process.
What Drill Bits Are Best For Hardened Steel?
Cobalt M42 and solid carbide drill bits are the top picks for hard, heat-treated hardened steel with strong wear resistance.
How To Drill A Hole In Hardened Steel?
Use low drill speed, steady light pressure, apply cutting fluid, and start with a small pilot hole for clean drilling results.
Can Carbide Bits Drill Any Hardened Steel?
Carbide bits handle most standard hardened steel, yet ultra-high hardness alloy steel still needs professional industrial bits.
Are Titanium Drill Bits Good For Hardened Steel?
Titanium coated HSS bits are not ideal; they dull quickly and lack enough hardness for tough hardened steel drilling.
What Are Common Mistakes When Drilling Hardened Steel?
Running too fast, applying heavy force, skipping cutting fluid and using ordinary HSS bits are frequent drilling errors.
Should I Use Cutting Fluid When Drilling Hardened Steel?
Yes, cutting fluid lowers heat, reduces bit wear, prevents overheating and creates smoother holes on hardened steel.
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Trusted by businesses worldwide
See what our global partners say about our premium drilling tools and cutting solutions.
"We Need Drill Bits For Hardened Alloy Steel For Our Production Line. These Bits, Made With Premium M35 Cobalt, Handle The Toughness Of Our Materials Exceptionally Well. They Maintain Their Sharpness For Long Runs, Which Has Significantly Reduced Our Tool Replacement Costs. We Are Impressed And Plan To Continue Working With You."
Liam Henderson
Auto Body Repair Workshop Manager
United Kingdom
"Our Clients In The Automotive Industry Rave About These Alloy Steel Drill Bits. They Appreciate The Precision And The Ability To Drill Through Hardened Components Without Breaking. The Quality Is Top-Notch, And We Are Committed To Continuing Our Partnership."
Giulia Bianchi
Automotive Hardware Importer
Italy
"For Repairing Heavy Machinery, We Trust These Drill Bits For Hardened Steel. They Deliver Consistent Performance And Have Never Disappointed Us On Critical Jobs. We Value This Reliability And Look Forward To Placing More Orders In The Future."
Ole Kristensen
Vehicle Modification Engineering Contractor
Norway
"We Need Drill Bits For Hardened Alloy Steel For Our Production Line. These Bits, Made With Premium M35 Cobalt, Handle The Toughness Of Our Materials Exceptionally Well. They Maintain Their Sharpness For Long Runs, Which Has Significantly Reduced Our Tool Replacement Costs. We Are Impressed And Plan To Continue Working With You."
Liam Henderson
Auto Body Repair Workshop Manager
United Kingdom
"Our Clients In The Automotive Industry Rave About These Alloy Steel Drill Bits. They Appreciate The Precision And The Ability To Drill Through Hardened Components Without Breaking. The Quality Is Top-Notch, And We Are Committed To Continuing Our Partnership."
Giulia Bianchi
Automotive Hardware Importer
Italy
"For Repairing Heavy Machinery, We Trust These Drill Bits For Hardened Steel. They Deliver Consistent Performance And Have Never Disappointed Us On Critical Jobs. We Value This Reliability And Look Forward To Placing More Orders In The Future."
Ole Kristensen
Vehicle Modification Engineering Contractor
Norway
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