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DIN 1869 HSS Extra Long Drill Bits
DIN 1869 extra-long design provides extended reach for deep-hole drilling and hard-to-access workpieces.
Fully ground flute technology supports fast chip removal, lower friction, and cooler drilling performance.
135° split point tip ensures precise self-centering, reduces walking, and improves drilling accuracy without center punching.
Clear shank size marking helps users identify sizes quickly, improving efficiency in workshop and industrial use.
100% pre-shipment inspection with HRC testing ensures stable cutting performance, reliable hole quality, and consistent bulk order standards.
Trusted by Global Brands
OEM Partner for Industry Leaders
Customization & Packaging
Complete OEM/ODM solutions tailored to your brand requirements
OEM Customization — DIN 1869 HSS Extra Long Drill Bits
- Extra-long size customization
- Material Options（HSS 4241, 4341, 6542(M2), and cobalt grades ）
- Packaging Customization (Plastic Tube, PVC Pouch, Color Box, or Bulk)
- Private label marking
Application Notes
Discover the versatile applications and material compatibility of our products
Drilling Wood
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Real Factory & Application Videos
Watch real manufacturing and field applications to verify quality, performance, and supply capability
How Can Long Series Drill Bits Improve Deep Hole Drilling Efficiency?
Long reach design helps drill deeper holes in thick workpieces, with smooth chip removal and stable cutting for buyers.
Can HSS Twist Drill Bits Handle Multiple Drilling Materials?
Suitable for metal, aluminum, wood, and plastic, helping wholesalers cover more customer needs with one practical drill bit range.
What Makes HSS Twist Drill Bits Reliable for Bulk Orders?
Factory-direct supply, OEM packaging, low MOQ, and stable production help reduce complaints and support long-term repeat business.
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 |
|---|---|---|---|
| 1.0mm | 33mm Flute Length / 56mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 1.5mm | 45mm Flute Length / 70mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 2.0mm | 56mm Flute Length / 85mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 2.5mm | 62mm Flute Length / 95mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 3.0mm | 66mm Flute Length / 100mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 3.5mm | 73mm Flute Length / 112mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 4.0mm | 78mm Flute Length / 119mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 4.5mm | 82mm Flute Length / 126mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 5.0mm | 87mm Flute Length / 132mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 5.5mm | 91mm Flute Length / 139mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 6.0mm | 91mm Flute Length / 139mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 6.5mm | 97mm Flute Length / 148mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 7.0mm | 102mm Flute Length / 156mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 7.5mm | 102mm Flute Length / 156mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 8.0mm | 109mm Flute Length / 165mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 8.5mm | 109mm Flute Length / 165mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 9.0mm | 115mm Flute Length / 175mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 9.5mm | 115mm Flute Length / 175mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 10.0mm | 121mm Flute Length / 184mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 10.5mm | 121mm Flute Length / 184mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 11mm | 128mm Flute Length / 195mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 11.5mm | 128mm Flute Length / 195mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 12mm | 134mm Flute Length / 205mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 12.5mm | 134mm Flute Length / 205mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 13.0mm +mm | 134mm Flute Length / 205mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 13.5mm | 140mm Flute Length / 214mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 14mm | 140mm Flute Length / 214mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 14.5mm | 144mm Flute Length / 220mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 15mm | 144mm Flute Length / 220mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 15.5mm | 149mm Flute Length / 227mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 16mm | 149mm Flute Length / 227mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 16.5mm | 154mm Flute Length / 235mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 17mm | 154mm Flute Length / 235mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 17.5mm | 158mm Flute Length / 241mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 18mm | 158mm Flute Length / 241mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 18.5mm | 162mm Flute Length / 247mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 19mm | 162mm Flute Length / 247mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 19.5mm | 166mm Flute Length / 254mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
| 20mm | 166mm Flute Length / 254mm Overall Length | M35/M42/Custom Body Material/Custom Coated | Bulk Packing/Plastic Boxes Customization |
Frequently Asked Questions
Everything you need to know about our products, customization options, and ordering process.
Do they make extra long drill bits?
Yes, Extra-long drill bits are designed for industrial deep-hole drilling where standard lengths cannot reach. TENYU extra-long drill bits use premium HSS material with specialized heat treatment, achieving 63+ HRC hardness while maintaining flexibility for stable deep drilling performance.
What are really long drill bits called?
In the professional B2B tooling market,these extended drills With Extra Long Series and Aircraft Extension Drills.
Can you make a drill bit longer?
Custom Manufacturing: As an OEM/ODM factory, we can manufacture bits with custom-length shanks during the production phase to meet specific engineering requirements, ensuring the entire tool maintains a consistent 63 HRC+ hardness and perfect concentricity.
Can you get extra long drill bits?
Absolutely. Extra-long bits are available as standard catalog items for diameters ranging from 2mm to over 20mm.They often feature a parabolic flute design to facilitate the efficient evacuation of metal chips from depths exceeding 10 times the drill's diameter.
Are there extra long drill bits?
Yes,Our extra-long series provides the reach needed for drilling through multiple layers of material or reaching recessed fasteners. We ensure every extra-long bit meets rigorous quality control standards, ensuring that even at lengths of 500mm or more, the tool delivers the precision expected by professional importers.
Need a Quotation?
Send us your inquiry with contact person, WhatsApp, email, and message. Our team will respond quickly.
Other ways to reach us
| Series | Length Grade | Overall Length (OAL) | Flute Length (LCF) | Application |
|---|---|---|---|---|
| Series 1 (I) | Shortest extra-long type | 195–315 mm | 135–210 mm | Medium-depth drilling with better rigidity |
| Series 2 (II) | Medium-long type | 240–370 mm | 160–250 mm | General deep-hole drilling |
| Series 3 (III) | Longest extra-long type | 280–480 mm | 190–320 mm | Extreme deep holes and hard-to-reach positions |
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Trusted by businesses worldwide
See what our global partners say about our premium drilling tools and cutting solutions.
"Exceptional factory for DIN 1869 HSS Extra Long Drill Bits sourcing. Their 15-25 Lead Time is impressive. These bits reach deep inside pipes with perfect accuracy on drill presses. No supply disruption so far—a highly recommended manufacturing partner for industrial projects."
Lucas Morel
Technical Director
France
"Reliability is key for our DIN 1869 HSS Extra Long Drill Bits wholesale business. We’ve seen no quality instability across bulk orders. Perfect depth control for deep-hole drilling. Their professional OEM service and low MOQ from 100 pas support our brand's growth effectively."
Hiroshi Tanaka
Procurement Manager
Japan
"Best value for DIN 1869 HSS Extra Long Drill Bits sourcing. They function perfectly in high-precision tasks. With zore customer complaints and a Stable Lead Time, this factory is our most dependable long-term supplier for high-quality industrial drill bits."
Erik van der Berg
Supply Chain Manager
Netherlands
"Exceptional factory for DIN 1869 HSS Extra Long Drill Bits sourcing. Their 15-25 Lead Time is impressive. These bits reach deep inside pipes with perfect accuracy on drill presses. No supply disruption so far—a highly recommended manufacturing partner for industrial projects."
Lucas Morel
Technical Director
France
"Reliability is key for our DIN 1869 HSS Extra Long Drill Bits wholesale business. We’ve seen no quality instability across bulk orders. Perfect depth control for deep-hole drilling. Their professional OEM service and low MOQ from 100 pas support our brand's growth effectively."
Hiroshi Tanaka
Procurement Manager
Japan
"Best value for DIN 1869 HSS Extra Long Drill Bits sourcing. They function perfectly in high-precision tasks. With zore customer complaints and a Stable Lead Time, this factory is our most dependable long-term supplier for high-quality industrial drill bits."
Erik van der Berg
Supply Chain Manager
Netherlands
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