Extra Long Drill Bits Manufacturer

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

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
Rostfreier Stahl	Cobalt alloy bit	Lower speed, firm consistent pressure	Sulfur-based cutting oil
Gehärteter Stahl	HSS or carbide-tipped bit	High speed, avoid excessive pressure	Kerosene or light oil
Holz	Brad-point or auger bit	High speed, clear chips frequently	Generally none
Beton	SDS drill bit	Hammer drill action, steady pressure	Water cooling if possible
Kunststoff	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	Lösung	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

Typ	Best For	Cutting Edge Design	Vorteile	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	Mittel	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	Kobaltbohrer	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	Mittel	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	Kobaltbohrer	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

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, Kobalt, 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 Kobalt und 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 und 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 lange Bohrer

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-Werkzeuge 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-Werkzeuge employs superior heat treating for longer cutting life.

Kobaltbohrer

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.

Verlängerungsbohrer für Flugzeuge

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

Das 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 Erstausrüster/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-Werkzeuge 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,Amazonas, Homedepot , and manymore! These are dedicated e-commerce websites that can bring you the customizations you’re looking for with your saw blade.

Extra Long Drill Bits Manufacturer