Deep-Hole Drill Bits

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

JIAYI deep-hole drill bits for straight and stable drilling

Deep-Hole Drill Bits

Drilling Tools for Deep, Straight Holes

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

  • ISO 9001:2015 Certified
  • Manufacturing Since 2009
  • 1,800 m² Facility
  • 8,000 Tools/Day
Product range

Manage the Entire Deep-Hole Process

Successful deep-hole drilling depends on the tool, machine, guide strategy, coolant delivery, and cutting parameters working together.

01

Straightness at depth

Tool geometry and process conditions are evaluated to control drift over the required drilling depth.

02

Chip evacuation

Flute, cutting-edge, and coolant strategy are selected to move chips reliably out of the hole.

03

Stable long-reach cutting

Tool construction and setup are reviewed to limit vibration and deflection over extended reach.

04

Custom reach and diameter

Non-standard diameters, lengths, and interfaces can be engineered after the application is confirmed.

Tool selection

Depth, Coolant, and Machine Data Are Essential

Provide the hole diameter and depth, entry and exit conditions, straightness and finish requirements, workpiece material, machine type, spindle interface, coolant pressure and flow, and expected volume. JIAYI will review whether the proposed tool and process are suitable before quotation.

DrawingsMaterialMachine & coolantVolume
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Deep-Hole Drill Bits from JIAYI
Catalog

Deep-Hole Drill Bits series

Open any tool for dimensions and drawings, or request a quote for a modified version.

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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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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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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6 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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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.

DX150X deep-hole drill series card
XC Type Carbide Drill. The DX150X 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 and a wide range of applications. Standard sizes and custom tools made to your drawings.
DX170X deep-hole drill series card
XC Type Carbide Drill. The DX170X 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.
DX180X deep-hole drill series card
XC Type Carbide Drill. The DX180X series of internally cooled, extra-long-flute carbide drill bits are high-performance tools developed by JIAYI Tools specifically for deep-hole drilling applications (15 times the diameter or more) and difficult-to-machine materials. Standard sizes and custom tools made to your drawings.
Why JIAYI

Why Choose JIAYI for Deep-Hole Drill Bit Applications

  • 01

    Process-level review. The recommendation considers chip control, coolant delivery, stability, and guidance — not only the drill diameter.

  • 02

    Geometry for the application. Cutting geometry, substrate, coating, and length are matched to the confirmed material and machine conditions.

  • 03

    Custom engineering. Special reach, diameter, and interface requirements can be developed from the hole drawing and process data.

Custom tooling

Need a Deep-Hole Tool for a Specific Setup?

Send the hole drawing and complete process data, especially coolant capability and machine configuration. Our engineers will review the application before proposing and quoting the tool.

Request custom tool quote
Application review

Planning a deep-hole operation? Ask our tooling engineers to review the tool and process together.