Extra Long Drill Bits Manufacturer
- Your Trusted Partner in Premium Hardware Tool Manufacturing
- 15+ Years of Excellence in Hardware Manufacturing
- Wholesale Hardware Sets at Factory-Direct Prices
- OEM & Private Label Services | EN12413 Certified
While brands like Gühring provide top-tier performance, Tenyu Tools offers the same M35/HSS-Co industrial standards at factory-direct pricing, significantly increasing your wholesale profit margins.
Extra Long Drill Bits Manufacturer From China
- One-stop solution for your purchase
- 15 Years Expertise in OEM & ODM Services
- Your Brand, Our Precision – Tailored OEM Drill Bit Solutions
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Your Leading Extra Long Drill Bits for Metal Drilling Manufacturer & Supplier
Internationally Certified Supplier
Tenyu Tool, specializing in extra-long drill bits for metal drilling, meets global standards with SGS approval and ISO certifications for quality and environmental management.
Comprehensive Quality Control
All products are rigorously tested in Tenyu Tool’s advanced lab and inspected by a dedicated QC team of over 100 professionals to ensure flawless performance.
Certified Compliance Documentation
Every shipment includes a manufacturing test certificate verifying that the products meet required chemical and mechanical standards.
Efficient Production and Delivery
With 15 automated production lines, Tenyu Tool maintains consistent delivery within 7–35 days, ensuring timely fulfillment even during high-demand periods.
Tenyu Tool Professional Production Workshop for Extra Long Drill Bits
Support online face-to-face factory visits
Voice of the World Exhibition
Tenyu Tool actively participates in trade shows around the world and visits our customers, we get closer to them and get more opportunities to present our extra long drill bits.
Qualification Certificate
Third-Party Verified Excellence: Engineering Confidence Into Every Extra Long Drill Bits
Guidelines for the Proper Use of Extra-Long Drill Bits in Drilling
Step | Procedure | Important Notes |
1. Preparation | Select the correct extra-long drill bit for material and hole size. | Ensure bit is sharp, straight, and free from cracks or warping. |
2. Marking | Accurately mark the drilling point with a punch or guide. | Prevents wandering and ensures precise entry. |
3. Setup | Secure the workpiece firmly using clamps or a vise. | Prevents vibration, improves accuracy, and reduces bit breakage. |
4. Alignment | Position drill perpendicular (or at intended angle) to surface. | Misalignment can cause bending, binding, or tool failure. |
5. Drilling | Begin drilling at low speed, gradually increase while applying steady pressure. | Avoid excessive force; let the bit cut rather than push. |
6. Clearing Chips | Retract the bit periodically to remove chips and allow cooling. | Reduces heat buildup, prevents clogging, and maintains cutting efficiency. |
7. Finishing | Drill through completely, then slowly retract while still rotating. | Prevents jamming, ensures clean exit hole, and protects bit integrity. |
Extra-Long Drill Bits for Drilling Material-Specific Techniques
Material Type | Recommended Cutter | Key Technique | Lubrication Needs |
Mild Steel | High-speed steel (HSS) bit | Use steady feed, moderate speed | Light cutting oil |
Stainless Steel | Cobalt alloy bit | Lower speed, firm consistent pressure | Sulfur-based cutting oil |
Hardened Steel | HSS or carbide-tipped bit | High speed, avoid excessive pressure | Kerosene or light oil |
Wood | Brad-point or auger bit | High speed, clear chips frequently | Generally none |
Concrete | SDS drill bit | Hammer drill action, steady pressure | Water cooling if possible |
Plastic | HSS bit with sharp point | Low speed, avoid overheating | None or minimal water mist |
Extra-Long Drill Bits for Different Material Drilling Proper Usage
Situation | Solution | Tool Requirement |
Drilling deep holes in metal | Use cutting fluid, drill in stages, retract to clear chips | Extra-long HSS or cobalt bit, cutting oil |
Drilling through thick wood | Maintain high speed, clear chips often | Extra-long auger or brad-point bit |
Drilling into concrete | Use hammer action with steady pressure | Extra-long SDS drill bit |
Drilling plastics | Low speed, avoid overheating | Extra-long HSS bit with sharp edge |
Drilling stacked materials | Clamp tightly, drill slowly through layers | Extra-long multi-purpose bit |
Comparison of Extra-Long Drill Bits Types and Their Applications
Type | Best For | Cutting Edge Design | Advantages | Limitations | Typical Applications |
HSS Extra-long Bit | Mild steel, general metals | Standard twist with sharp edge | Affordable, versatile, easy to sharpen | Wears faster on hard metals | General fabrication, maintenance drilling |
Cobalt Extra-long Bit | Stainless steel, hardened alloys | Split point, reinforced edge | High heat resistance, long life | More brittle, higher cost | Industrial metalworking, aerospace parts |
Extra-long SDS drill bit | Concrete, stone, brick | Tungsten carbide tip with wide flutes | Extremely hard, durable in abrasive materials | Brittle, requires hammer drill | Construction, anchoring holes |
Brad-point Extra-long Bit | Hardwood, softwood | Center spur with outer cutting spurs | Precise entry, clean hole edges | Limited to wood, not for metal | Furniture making, cabinetry |
Auger Extra-long Bit | Thick timber, deep wood drilling | Screw tip with wide spiral flute | Fast chip removal, deep hole capability | Coarse finish, limited to wood | Timber framing, utility pole drilling |
Comparative Technical Analysis of Extra-Long Drill Bit Types
Technical Feature | High-Speed Steel (HSS) Drill Bits | Airplane Extension Drill Bits |
Tooth Geometry | Standard twist design | Standard twist with extended shank |
Material Compatibility | Wood, plastics, mild metals | Wood, plastics, light metals, confined areas |
Optimum Cutting Speed | Medium | Medium to high, depending on reach |
Surface Finish Quality | Moderate to high, clean cut on soft metals and wood | Moderate, optimized for accessibility rather than finish |
Vibration Levels | Low to medium | Medium, higher risk due to extended length |
Comparative Technical Analysis of Extra-Long Drill Bit Types
Technical Feature | High-Speed Steel (HSS) Drill Bits | Airplane Extension Drill Bits | Cobalt Drill Bits | Solid Carbide Drill Bits |
Tooth Geometry | Standard twist design | Twist design with extended shank | Split point, reinforced cutting edge | Precision-ground, very sharp edges |
Material Compatibility | Wood, plastics, mild metals | Wood, plastics, light metals, confined areas | Hard metals, stainless steel | Aerospace alloys, hardened steel, composites |
Optimum Cutting Speed | Medium | Medium–High (depends on reach) | Medium–High (to avoid overheating) | High (requires stable machine setup) |
Surface Finish Quality | Moderate–High | Moderate (focus on reach, not finish) | High, smooth on hard metals | Very High, excellent precision finish |
Vibration Levels | Low–Medium | Medium–High (extended length adds flex) | Low–Medium | Low (if rigid machine used), High if handheld |
Application-Based Selection Guide for Extra-Long Drill Bit Types
Application Scenario | Recommended Choice | Technical Rationale | Pro Tip |
General-purpose drilling in wood, plastics, or mild metals | High-Speed Steel (HSS) Drill Bits | Cost-effective, versatile, and heat-treated for extended life | Use cutting oil on metals to extend tool life |
Drilling in confined or hard-to-reach areas | Airplane Extension Drill Bits | Extended shank provides access to restricted spaces | Maintain steady alignment to reduce vibration |
Working with hard metals or stainless steel | Cobalt Drill Bits | Cobalt alloy provides superior heat resistance and hardness | Drill at low speed with firm pressure to prevent work hardening |
Precision machining in aerospace, automotive, or hardened alloys | Solid Carbide Drill Bits | Exceptional hardness and wear resistance, ideal for CNC and stable setups | Use only with rigid, machine-assisted drilling to avoid breakage |
Table of Contents
FAQ section：
How deep can these extra-long drill bits actually drill, and what materials are they compatible with?
These bits are specifically engineered for deep-hole applications that standard bits cannot reach. With a total length of [Insert Length, e.g., 12 inches], they are ideal for drilling through thick wooden beams, soft metals, plastics, and PVC.
• Pro Tip: For maximum efficiency in deep wood, we recommend using a “pecking” motion—pulling the bit back periodically to clear wood chips and prevent clogging.
Will the drill bit bend or wobble during use due to its extreme length?
Naturally, longer bits have more flexibility than standard ones. To ensure a straight, precise hole and prevent snapping:
• Start with a pilot hole: Use a standard-length bit of the same diameter to create a guide hole (about 1 inch deep).
• Steady pressure: Insert the long bit into the pilot hole before starting the motor. Apply steady, downward pressure and avoid any lateral (side-to-side) force.
Does the bit overheat or lose its sharpness quickly during long-distance drilling?
Our bits are crafted from Premium HSS (High-Speed Steel) with a heat-resistant coating to maintain hardness at high temperatures. However, deep-hole drilling generates significant friction.
Maintenance: To extend the life of your bits, use cutting fluid or lubricant when drilling through metal and operate at a lower RPM. This prevents the tip from “burning” and ensures the cutting edge stays sharp for hundreds of uses.
What is the maximum length capability for your custom extra-long drill bits?
While many suppliers only offer standard catalog sizes, Tenyu Tools specializes in extreme-reach engineering.The most advanced CNC grinding machines are used in the manufacturing of drill bits ranging from 1mm to 1000mm (a metre) in length. For both straight shank and Morse taper shank designs, we offer you complete customization options that let you specify the exact flute length and overall size dimensions to match industrial blueprints for your customers.
How does Tenyu ensure straightness and prevent breakage in Extra Long Drill Bits over 500mm?
For procurement managers, high return rates due to “bit walking” or snapping are major concerns. We solve this through two critical engineering processes:
Precision Straightness Control: Each piece is straightened in two-step, straightening process. After vacuum heat processing we use custom semi- automatic machines to ensure TIR conform with industrial standards, which allows the tools to run vibration free at high cutting speeds.
Breakage Prevention:We use an Parabolic Flute Design that is higher than standard spirals. Such a design improves chip removal, and reduces heating which is the main cause of bit failure in deep holes.
Extra-Long Drill Bit vs. Drill Bit Extension: Which offers better ROI for my clients?
Drill Bit Extensions are cost-effective for occasional DIY “reach” tasks but suffer from low rigidity and high run-out.
By contrast, Tenyu’s One-Piece Extra-Long Bits are called ― I kid you not — “industrial workhorses”. These are great bits and feature -Superior concentricity -Advanced torque resistance -Extended tool life. When suggesting extra-long one-piece bits in construction, mining or heavy manufacturing for your professional tradesmen customers, you are reducing downtime on the job and ensuring hole accuracy while protecting the brand that signifies quality – yours.
Can we request custom Extra Long Drill Bits diameters and private labeling for international markets?
Absolutely. We offer full OEM services – laser marking on the shank with your brand logo as well packaging Options: bulk, plastic tubes, or set box. Our MOQ is flexible for the stable and confident buyers, we support order by container or LCL shipment in small quantity.
How do Extra Long Drill Bits Tenyu Tools vs Gühring vs Norseman?
We only follow the leaders We follow world class leaders like Gühring and Norseman. Tenyu’s goal is to provide an industrial-level service, for a factory direct price. Purchasing from us provides you with the same M35 Cobalt (5%) material standard, grinding graduations, and top-tier brand quality that our wholesale business customers currently experience and for far less. We successfully stand in the middle “luxury price” and “quality industrial performance”, to improve your local market competitive forces.
Extra Long Drill Bits Supplier | Extra Long Drill Bits for Precision Deep Drilling
When you need to drill deep holes, reach the maximum depth, and achieve perfect accuracy, simply will not do the job. That is where long drill and extra-long drill bits are needed. As an industry-leading producer, Tenyu Tools excels in manufacturing high-capacity drill bits for the woodworking, metalworking, construction, and special industries markets. With the finest materials such as HSS, cobalt, and solid carbide, our tools are created for strength, precision, and long-lasting performance.
Understanding Long Drill Bits
Extended drill bits are specifically designed for drilling holes beyond the reach of normal bits. They are an indispensable tool for deep drilling into wood, small metal holes for precision, or reaching remote locations within machines and buildings. By choosing the proper design and material, one can obtain efficiency and reliability for high-pressure tasks.
What are Long Drill Bits?
Extended-length cutting tools for applications where deeper holes are needed than with ordinary bits, long drill bits are available in more than one diameter, length, and material. They are employed across the globe in woodworking, aerospace, automotive, and building projects. Their increased reach offers great precision and reach into thick or tight material.
Types of Long Drill Bits
There are available varieties of long drill bits which are designed for a specific material and function. Types help the user determine the proper tool for the task and prevent tool wear or under performance.
Twist Long Drill Bits
The most versatile and widely used type. Twist long drill bits are designed with spiral flutes that help remove chips and debris as you drill. They are suitable for wood, plastics, light metals, and composite materials. At Tenyu Tools, twist long drill bits are available in multiple lengths and diameters, ensuring clean, precise holes in both industrial and DIY applications.
Auger Long Drill Bits
Auger bits cut very aggressively and cut very deeply into the wood. Their large, wide flutes make them perfect for drilling deep, clean holes through timber, beams, and lumber. They are generally used for building, carpentry, and electrics, where deep wooden channels are needed.
Spade Long Drill Bits
Spade bits consist of a flat paddle-shaped cutting edge that cuts full-sized, shallow-to-medium-depth holes readily in wood. When one needs to drill through thicker wooden stock, framing material, or cabinetry stock, longer models are the ideal choice. They’re not as precise as the twist bits, but they’re fast and economical.
Airplane Extension Drill Bits
Originally designed for aerospace use, the bits provide enhanced reach and versatility for constricted or hard-to-reach areas. They can easily be utilized for aerospace, auto, and industrial repair uses for drilling through constricted configurations. Tenyu Tools manufactures aviation extension drill bits with precision standards, therefore becoming a trusted alternative among industries where quality and durability matter most.
Specialty Long Drill Bits
Some of them are the step-long drill bits, the countersink long drill bits, and the multi-material drill bits. They are specially designed for specialty drilling applications within industries, and they provide one-of-a-kind solutions where ordinary designs could not deliver optimally.
Common Applications of Long Drill Bits
The multi-purpose nature of the long drill bits renders them indispensable within industries from woodworking to aerospace applications. Their uses depend on varying material composition, length, and flute configuration.
Woodworking and Carpentry
These are the absolute necessities for drilling deep dowel holes, beam through-holes, furniture joints, and cabinetry installations. Auger and spade long drill bits are particularly used for timber framing and framed buildings.
Metalworking and Fabrication
In applications involving pipes, steel plate, and machine parts, the length of the drill bit gives the reach for drilling deep holes or punching through one or more metal layers. Tenyu Tools offers cobalt and carbide bits for durability, longevity, and heat resistance for such tough applications.
Construction & Masonry Work
Masonry long drill bits are required for fastening anchors, bolts, conduits, and rebar junctions for masonry applications. When equipped with carbide-tipped varieties, they deliver the toughness required for drilling into hard materials such as stone, concrete, and reinforced brick.
Aerospace and Automotive Applications
High drills or really long drill bits, notably aircraft extension drills, are designed for precise drilling within tight locations like the fuselage portions of an aeroplane, car chassis, and machine shop equipment. Accuracy and the ability to reach tight locations are what make them irreplaceable within these sectors.
Installations, Electricity, and Sanitaries
Plumbers and electricians use long drill bits to pull wires, conduits, and pipes through thick beams, ceilings, or walls. Auger and twist-long drill bits help them make the installations swiftly without tearing down buildings.
Industrial Maintenance and Heavy Equipment
Maintenance personnel typically employ the longer drill bits for machinery repair, drilling holes for bolts, or making access holes for large equipment. The Tenyu Tools’ HSS, Cobalt, and Carbide bits’ durability provides consistency even for the high-use applications that occur within an industry setting.
Extra Long Drill Bits
When standard long drill bits are insufficient, extra-long drill bits offer unmatched reach and precision. Their specialized designs are for penetrating thick material, dado holes, and longer-than-average workpieces where standard tools are unable to provide an effective performance. Tenyu Tools manufactures extra-long drill bits via its superior engineering processes for the purpose of providing durability, sturdiness, and reduced breakages even under extreme circumstances.
Features of Extra Long Drill Bits
- Up to 72 inches long.
- High-quality material selection (HSS, Co, carb.
- Optimized flute designs for smooth chip removal.
- Balanced construction to reduce vibration.
Advantages of Using Extra Long Drill Bits
Extra-long drill bits provide an array of benefits, which make them worth the investment for both professional and commercial individuals. They are not like normal bits since they are created for reach, comfort, and performance in the case of deep drilling.
Stretch into hard-to-reach
Their longer length provides the ability to drill locations where standard drill bits are too short, like deep holes, large beams, or machine housing. It provides the ability to perform work without having to dismantle structures.
Deeper Drilling with one Pass
Extra-long drill bits eliminate the necessity for step drilling or the use of multi-part short bits. Performing deeper holes within a single continuous operation, they conserve time, cut down tool changes, and maximize workflow productivity.
Flexibility Through Materials
Whether the project involves working with wood, plastics, masonry, or metal, extra-long drill bits, and particularly those made from cobalt or carbide, can deal with harsh situations and stay true.
Higher Accuracy and Smooth Finish
Their longer length provides more controlled drilling through thick material for straighter, more accurate holes with a smoother finish. It is most desirable where accuracy is paramount, such as in aerospace, automotive, and construction applications.
Cost Efficiency Over Time
Although longer-than-average drill bits cost more initially, their longevity, longer life, and suitability for which they can be employed for a variety of applications render them a cost-effective option for the industry and professional users who engage in frequent deep drilling.
Choosing the Right Extra Long Drill Bit
Material compatibility
- General-purpose HSS
- heat resistance by the addition of cobalt
- high hardness by carbide
Hole depth and diameter
- To suit the project’s techno-technical necessities
Machine compatibility
- Ensure your drill supports extended lengths.
Application requirements
- Select masonry bits for concrete, aviation extension bits for aerospace/automotive, and so on.
Materials for Long Drill Bits
The performance and longevity of a long drill largely depend upon the material. We employ the use of HSS, cobalt, and solid carbide for the highest performance and longevity at Tenyu Tools.
High-Speed Steel (HSS) Drill Bits
Inexpensive and multi-purpose, it is best for wood, plastics, and mild metals. Tenyu Tools employs superior heat treating for longer cutting life.
Cobalt Drill Bits
Supplied enriched with cobalt alloy for high heat resistance and durability, suitable for hard metals and stainless steel.
Solid Carbide Drill Bits
Toughest one, best for aerospace and auto applications for high-precision drilling. Good wear resistance, but only appropriate for stable machine-assisted drilling.
Steel vs. Carbide – Which Should You Use?
HSS → Everyday use.
Cobalt → High-strength metals and high-heat occupations.
Carbide → Most desirable for high durability and accuracy.
Specification for Long Drill Bits
Tenyu Tools supplies drills of longer length with varying specifications for varying industries.
6″ or 12″, 18″, or 72
From small jobs through to heavy industrial drilling, we offer standard and special sizes.
Flute Design: Straight versus Twist
Straight Flute bit drill: It has a narrow channel and is suited for shallow hole drilling. It uses a shearing action for the cutting process.
Twist Flute bit drill: Best for chip elimination effectively within metal, masonry, and wood.
Types of Shank: Others and Straight Shank
Straight Shank: Most basic, universal form.
Reduced Shank: Fits larger bits into smaller chucks.
Hex Shank: Additional traction for power drill usage.
Taper Shank: Ultimate stability for heavy equipment.
Applications of Long Drill Bits
Woodwork
Ideal for furniture building, cabinetry, joining with dowel, and drilling into beams.
Masonry and Concrete
Tungsten carbide-tipped bits for heavy construction jobs such as laying anchors and drilling conduit.
Aircraft Extension Drills
For auto and aerospace applications, for reach and accuracy, where the spaces are small. Tenyu Tools engineers customized drill bits for professional performance in any category.
Why Our Long Drill Bits?
Tight Quality Control Specifications
Every piece is examined for quality, firmness, and durability.
Custom Sizes and OEM Options
Custom designs, specialty sizes, and private labels for you.
Global Delivery and Customer Care Guarantee
Say it through global shipping and expert tech support for every order.
Tenyu Tools’ selection is a partnership with an experienced, capable factory committed to lasting performance.
Purchasing Long Drill Bits
The proper selection of the manufacturer for the long drill bits is not any different from the selection of the type of drill bit itself. A quality source offers consistent reliability, material authenticity, and precise manufacturing details that affect drilling efficiency and tool life directly.
Finding a Reliable Manufacturer
Points for thinking are as follows:
Quality of Material
The best drill bits are made from superior-grade HSS, cobalt, or solid carbide materials, heat-treated properly for improved strength and cutting efficiency. It thus falls upon the producer to source raw materials that are of the highest quality.
Customization and OEM Service
No two markets are the same. A quality manufacturer would be required to provide custom shanks, coatings, flute configurations, and sizes, and OEM/private labeling for custom projects or branding applications.
Quality Control and Certifications
Quality manufacturers follow rigorous quality control processes and international standards. It guarantees consistency of dimensions, hardness, and performance for each lot.
Dealing with an established partner such as Tenyu Tools means not merely procuring drill bits but investing in carefully crafted solutions for higher productivity, reduced downtime, and stable performance for all applications.
A website that offers Extra Long Drill Bitsmanufacturing services.
Some of the top sources of it would be in websites like Alibaba, AliExpress, Made In China,Amazon, Homedepot , and manymore! These are dedicated e-commerce websites that can bring you the customizations you’re looking for with your saw blade.
