Hole Making Tools

Solid carbide drills, indexable drills, reamers and boring bars engineered for tight tolerance hole production in hydraulic manifolds and valve bodies.

Hole-Making Tools series

Explore by series

Six drilling and reaming series, each with its own application guide, tool-selection notes and RFQ checklist. Choose the series that matches your part to see configurations, materials and custom options.

01Solid Carbide Drilling Tools

Carbide Drill Bits

Solid carbide drills for accurate, repeatable holes in production machining — engineered for rigidity, wear resistance, and consistent hole quality, with standard and drawing-based options.

11 productsView series 02Versatile HSS Drilling Tools

High-Speed Steel Drill Bits

High-speed steel drills for general machining, fabrication, repair, and maintenance — a versatile, serviceable option for standard holes and application-specific grinds.

Made to your drawingView series 03Replaceable-Head Drilling Systems

Modular Drill Bits

Modular drilling systems pair a reusable tool body with replaceable cutting heads — simplifying cutting-edge replacement and supporting flexible hole-making across compatible configurations.

Made to your drawingView series 04Finishing Reamers for Accurate Bores

High-Precision Reamers

Finishing reamers engineered around final bore size, geometry, and surface-finish requirements — for applications where the pre-hole must become a controlled finished feature.

12 productsView series 05Drilling Tools for Deep, Straight Holes

Deep-Hole Drill Bits

Deep-hole drilling tools engineered around straightness, stability, chip evacuation, and coolant delivery — configured to the hole, workpiece, machine, and production conditions.

3 productsView series 06Stepped, Form, and Combination Drills

Custom Drill Bits

Custom stepped, form, and combination drills built from your drawing — combining required features in one engineered tool to reduce tool changes and simplify the machining sequence where the application supports it.

5 productsView series

Not sure which series fits? Send your drawing and our engineers will recommend the tool.

11 Products

Carbide Drill Bits

Solid carbide drills with internal coolant for steel, stainless steel, cast iron and high-temperature alloys.

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23 Products

Carbide Milling Cutters

Carbide square and ball end mills for your production requirements.

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9 Products

Carbide Taps

Ultra-fine grain tungsten carbide taps for a wide range of thread standards.

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4 Products

Carbon Fiber Milling Cutters

Ultra-fine grain tungsten carbide end mills for carbon fibre (CFRP) machining.

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5 Products

Custom Drill Bits

Step drills and special-profile drills made to your drawings or samples.

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4 Products

Custom Milling Cutters

Special-profile milling cutters made to your drawings or samples.

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12 Products

Danfoss Cavity Tools

Roughing and finishing cavity tools for Danfoss-compatible cartridge valve cavities.

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3 Products

Deep-Hole Drill Bits

Carbide drills for deep holes with stable chip evacuation and straightness.

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11 Products

Gear Shaper Cutters

Grade A pinion-type and disc-type gear shaper cutters in M35 cobalt HSS with TiAlN coating, for finishing and pre-shaving internal and external gears, per GB/T 6081 and DIN 3968.

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12 Products

High-Precision Reamers

Carbide, cermet and welded reamers for high-precision and deep-hole bores.

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1 Products

HSS Milling Cutters

High-speed steel milling cutters for general and interrupted machining.

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21 Products

HSS Taps

HSS and HSS-E spiral flute, straight flute and forming taps.

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4 Products

HydraForce Cavity Tools

Roughing and finishing cavity tools for HydraForce-compatible cartridge valve cavities.

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8 Products

ISO 1179 Port Tools (BSPP)

Port forming cutters for ISO 1179 BSPP (G thread) ports.

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4 Products

ISO 6149 Port Tools (Metric)

Port contour cutters for ISO 6149 metric thread ports.

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8 Products

Orthopedic Thread Milling Cutters

Thread mills for titanium alloy and stainless steel orthopedic locking plates.

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6 Products

Parker Cavity Tools

Roughing and finishing cavity tools for Parker-compatible cartridge valve cavities.

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2 Products

Plastic Cutting Tools

Carbide and HSSE end mills for engineering plastics, acrylics and composites.

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5 Products

SAE J1926 Port Tools (UNF)

Port contour cutters for SAE J1926 straight thread O-ring ports.

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16 Products

Sun Hydraulics Cavity Tools

Roughing and finishing cavity tools for Sun Hydraulics-compatible cartridge valve cavities.

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3 Products

T-Slot Milling Cutters

T-slot and undercut cutters for slots, grooves and keyways.

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23 Products

Thread Milling Cutters

Tungsten carbide thread mills for a wide range of thread standards.

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11 Products

Ultrasonic Blades

Ultrasonic cutting blades for honeycomb cores, prepregs and soft composites. Made to order to your drawings.

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38 Products

Cavity Tools

Complete range of cavity form tools compatible with Sun Hydraulics, HydraForce, Parker and Bosch Rexroth cartridge valve standards.

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17 Products

Composite Material Machining

PCD tipped and diamond coated tools designed for clean, delamination-free machining of carbon fiber, GFRP and other composite stacks.

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11 Products

Gear Tools

Precision gear cutting tools including hobs, shaper cutters and form milling cutters for spur, helical and spline applications.

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31 Products

Hole Making Tools

Solid carbide drills, indexable drills, reamers and boring bars engineered for tight tolerance hole production in hydraulic manifolds and valve bodies.

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31 Products

Milling Cutters

High performance milling cutters with TiAlN and AlTiN coatings for steel, stainless and superalloy machining.

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17 Products

Port Tools

Single-pass port tools producing complete port form, chamfer and thread relief in one operation. Available in all major hydraulic standards.

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61 Products

Threading Tools

Complete threading program including taps, solid carbide thread mills and indexable inserts for UN, metric, NPT and BSPP threads.

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No products listed in this category yet

We are still adding this range to our online catalog. These tools are available made to order: send your drawing or sample and we will quote sizes, lead time and price, or contact our team for current availability.

Made to Order

Manufactured to your drawing

Tools in this category are produced on request to your drawing, sample or specification. Send us your requirements and our engineers will reply within 24 hours.

Request a Quote Browse All Products

AR655 Series Deep-Hole Reamer

V-welded tungsten carbide six-flute reamer for deep-hole and through-hole precision reaming, with nano TiAlN coating and internal coolant. Standard sizes and custom tools made to your drawings.

CR415 High-Helix Carbide Reamer for Through-Hole Applications

High-helix carbide reamer with Nano DLC coating and internal coolant for clean, chatter-free reaming of through holes, deep grooves and blind holes.

CR750 High-Precision Reamers for Firearms

Tapered carbide reamer with diamond-like coating for precision bores such as barrel bores and gas ports in steel, stainless steel and titanium.

CRT426 Welded Metal-Ceramic Deep Hole Reamer

Brazed cermet deep-hole reamer for HRC 35–45 hardened and stainless steels, giving a mirror-like bore finish without coating.

CRT430 Welded Carbide Deep Hole Reamer

Brazed carbide deep-hole reamer with internal coolant for accurate bores in steel, stainless steel and aluminium alloys.

DC183X Three-Flute Threaded Bottom Hole Drill Bit

Threaded hole drill. The DC183X Series three-flute, internally cooled, high-efficiency carbide drill bits are high-performance tools developed by JIAYI Tools specifically for high-feed deep-hole drilling and high-volume machining applications. Standard sizes and custom tools made to your drawings.

DF177C Internally Cooled Flat-Bottomed Carbide Drill Bit

Non-planar drill bit. The DF177C series of high-efficiency, internally cooled carbide deep-hole drills is a cost-effective solution developed by JIAYI Tools specifically for deep-hole machining up to 12 times the drill diameter in medium-volume production scenarios. Standard sizes and custom tools made to your drawings.

DP160C High-Performance Flat X-Drills for Steel

Short Blade X-type Carbide Drill. The DP160C features an “external cooling groove + integrated stepped cutting edge” design, enabling precision machining of two different hole diameters in a single pass, while the external cooling system delivers coolant directly to the cutting zone. Standard sizes and custom tools made to your drawings.

DP170C High-Feed External Cooling Drill Bit

High-hardness drill bit. The DS170C series of externally cooled, high-efficiency deep-hole carbide drill bits is a cost-effective solution developed by JIAYI Tools specifically for deep-hole machining up to 12 times the diameter and medium-volume production scenarios. Standard sizes and custom tools made to your drawings.

DPG30C High-Feed External Cooling Drill Bit

High-hardness drill bit. The DPG30C series of externally cooled, short-fluted carbide drill bits are high-efficiency tools developed by JIAYI Tools specifically for high-feed small-hole and thin-walled part machining applications. Standard sizes and custom tools made to your drawings.

DPX50C High-Feed External Cooling Drill Bit

High-hardness drill bit. The DPX50C series of internally cooled, high-helix carbide drill bits are high-performance tools developed by JIAYI Tools specifically for deep-hole drilling up to 8 times the diameter and for machining materials prone to tool sticking. Standard sizes and custom tools made to your drawings.

DRG30 High-Feed External Cooling Drill Bit

High-hardness drill bit. The DRG30 series of externally cooled general-purpose carbide drill bits is a cost-effective product developed by JIAYI Tools specifically for general-purpose holes up to 6 times the diameter and a wide range of machining applications. Standard sizes and custom tools made to your drawings.

DRG50 High-Feed External Cooling Drill Bit

High-hardness drill bit. The DRG50 series of internally cooled, high-performance carbide drill bits are highly reliable products developed by JIAYI Tools specifically for precision hole drilling up to 8 times the diameter and for machining a variety of materials. Standard sizes and custom tools made to your drawings.

DRX30 High-Feed External Cooling Drill Bit

High-hardness drill bit. The DRX30 series of internally cooled, high-performance carbide drill bits are highly reliable products developed by JIAYI Tools specifically for precision hole drilling up to 8 times the diameter and for machining a variety of materials. Standard sizes and custom tools made to your drawings.

DRX50 High-Feed External Cooling Drill Bit

High-hardness drill bit. The DRX50 series of internally cooled, high-performance carbide drill bits are highly reliable products developed by JIAYI Tools specifically for precision hole drilling up to 8 times the diameter and for machining a variety of materials. Standard sizes and custom tools made to your drawings.

DS150X High-Feed External Cooling Drill Bit

High-hardness drill bit. The DS150X series of internally cooled general-purpose deep-hole carbide drill bits is a highly reliable product developed by JIAYI Tools specifically for general-purpose deep-hole machining up to 10 times the diameter, across a wide range of applications. Standard sizes and custom tools made to your drawings.

FAQ

Hole-making tools: common questions

Can't find your answer? Send your drawing and application details and our engineers will advise.

Ask an engineer

What is the best tool sequence to achieve high-precision holes with tight cylindrical and surface finish tolerances?

To achieve micron-level tolerances (such as IT7 or higher) and an excellent surface finish (Ra< 0.8µm), a strategic multi-step or combined approach is required:

Pre-Drilling: Utilize JIAYI SEIKO's solid carbide drills (ideally with internal coolant) to create a straight, stable baseline hole.
High-Precision Reaming: Follow up with our custom carbide or cermet reamers. Reaming is critical for correcting cylindricity and achieving the final diameter with extreme accuracy.
Combined Options: For high-volume production, we engineer multi-step drills or composite drilling-reaming tools that combine multiple operations into a single pass, drastically reducing cycle times and eliminating tool-change errors.

How can I prevent chip packing and tool breakage when drilling deep holes (5 x D to 30 x D)?

Deep hole drilling risks catastrophic failure if chips are not evacuated instantly. We recommend the following best practices:

Through-Coolant (Internal Coolant): Always use tools with internal coolant channels. High-pressure coolant forces chips back out along the flutes and cools the cutting zone directly.
Optimized Flute Geometry: JIAYI SEIKO's deep hole drills feature specialized wide-flute geometries and polished surfaces to minimize friction during chip transport.
Pecking Cycle: For extra-deep non-internal coolant setups, deploy a pecking cycle strategy to break and clear chips periodically, minimizing chip packing risks.

When should I choose Cermet reamers over Carbide reamers for high-volume hole finishing?

Tool material selection depends heavily on your production volume and workpiece material:

Cermet Reamers: Best utilized for high-speed, high-volume finishing of steel, ductile iron, and automotive components. Cermet offers exceptional chemical stability and resistance to built-up edge (BUE), yielding a superior mirror-like surface finish and longer tool life under high-speed conditions.
Carbide Reamers: Ideal for a broader application spectrum, including stainless steel, titanium, and exotic alloys, due to its higher toughness and resistance to chipping under variable cutting conditions. Inquire here to match the perfect tool material to your specific application.