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High Precision Grinding Services

DEK specializes in I.D. grinding, O.D. grinding, surface grinding, and centerless grinding. With our 20+ years of grinding experience, our professional team can grind to drawings, samples, or your instructions to provide the best service for your project!

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Precision Grinding Service


High Quality Precision Grinding Services


DEK offers a wide range of precision grinding services to global clients in medical, automotive, aerospace, marine, agricultural and other industries, adhering to their specifications to manufacture quality components.

At DEK, we pride ourselves on ultra-precision technology and quality. Our capabilities in grinding start at 0.1mm up to 300mm in diameter, 2mm up to 1200mm in length with a tight tolerance as low as ±0.001mm (+/- 0.00005″), and a micro finish as low as 0.4ra.

We specialize in ID, OD, surface and centerless grinding. In addition, we can handle any grinding requirement depending on your project. We can also process a wide range of raw materials, metals: stainless steel, aluminum, tool steel, mild steel, brass and copper, etc. plastics: nylon, acrylic, PTFE and PEEK, etc. making us truly versatile.

  • External diameter tolerances as tight as +/- 0.00007" (±0.002mm)
  • Internal diameter tolerances as tight as +/- 0.00007" (±0.002mm)
  • Roundness to +/- 0.00005" (±0.001mm)
  • Cylindricity to +/- 0.00005" (±0.001mm)
  • Grinding surface finishes 0.4Ra~0.8Ra
  • Diameter from 0.1mm to 300mm
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Precision Grinding Material

Explore our extensive selection of materials suitable for precision grinding Service. From metals to plastics, we offer versatile options to meet your specific project requirements.


Alloy Steel
Mild Steel
Stainless Steel
Tool Steel
Tungsten Steel
Alloy Steel

Alloy steel is an alloy of iron (Fe) and other elements ( including carbon, chromium, nickel, and molybdenum) and is a common metal with precision grinding. It is widely used in aerospace, automotive and tool making due to its hardness, high strength,  wear and corrosion resistance.

At DEK, we specialize in machining all types of alloy steels, including 4130 and 4340. You can get high precision parts such as: bearings, gears, crankshaft, connecting rod,drive shafts and more.


Alloy Steel 1215, 4130,4140,4340,8620,A514 etc.

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Brass is mainly composed of copper and zinc and has a yellow metallic appearance. It is widely used in electronics and construction  due to its excellent workability, thermal conductivity, corrosion resistance, good electrical and excellent mechanical.

At DEK, we specialize in machining all types of brass, you can get high-precision parts such as bolts, pins, bushings, collars,fasteners and more.


Brass 260, C360, Cz121,etc

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Bronze is a copper-tin alloy with excellent corrosion resistance, electrical conductivity and castability.

At DEK, we specialize in machining all types of bronze, including 544 and 841, and our high-precision service ensures high-quality parts for industries such as manufacturing and construction, perfect for bearings, gears, handrails, connectors, sockets, and more.


Bronze 544, 841, 932,954, etc.

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Copper is an extremely electrically conductive metal that is widely used in automotive and electronics due to its excellent thermal conductivity, ease of processing and corrosion resistance.

At DEK, we specialize in machining all types of copper, including 101 and 110, you can get high precision parts such as: electrical connectors, sensor parts, shafts, pins and more


Copper C101, C110, etc.

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Mild Steel

Mild steel has a carbon content of between 0.05% and 0.25%,is a commonly used material for swiss cnc turning. Due to its low carbon content, it has outstanding workability and plasticity. In addition, it has good weldability and moderate mechanical properties.

At DEK, we specialize in machining all types of mild steel, including 1018 and 1215, and you can get high-quality parts such as: bolts, nuts, shafts, bearings, rods and more for construction and automotive.


Mild Steel 1018, 1045, A36, 1215, etc.

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Stainless Steel

Stainless steel is an excellent material choice for precision grinding .Because it has good mechanical,  high temperature resistance, corrosion resistance, and is easy to machine.

At DEK, we specialize in machining all types of stainless steel, including 304 and  316,you can get  top-quality parts for industries such as automotive, manufacturing and medical, perfect for bearings, bushings, collars,valves, flanges, fittings, medical parts and more.


Stainless Steel 301, 303, 304, 304L, 316, 316L, etc.

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Titanium is a lightweight, high-strength metal that is popular in precision grinding. It has high temperature resistance, excellent corrosion resistance and biocompatibility.

At DEK, we specialize in machining all types of titanium, including Grade 2 and Grade 5.You can get high quality parts such as: engine parts, human implant materials, golf clubs and more for medical aerospace and sports.


Titanium Grade 1, Grade 2, Grade 5, etc.

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titanium -part-cnc-machining
Tool Steel

Tool steel is a specialty steel used in CNC Machining to make tools and dies. With high hardness, good toughness, wear resistance and corrosion resistance.

At DEK, we specialize in machining all types of tool steels including A2, A3 and D2.Our high precision service ensures high quality parts for industries such as manufacturing, automotive and aerospace, perfect for stamping dies, engine parts, turbine blades and more.


Tool Steel A2, A3, D2,S7, etc.

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Tungsten Steel

Tungsten steel has extremely high hardness and density. It has good resistance to high temperatures, wear and corrosion.

At DEK, we specialize in machining all types of tungsten steel, and our precision services ensure high-quality parts for industries such as industrial manufacturing and aerospace, perfect for jet engine nozzles, aircraft fuselages, grinding stones, grinding wheels, and more.


Tungsten Steel YG6, YG8, YG15, YL50, etc.

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surface finishing

One-stop Surface Finishing

Explore a wide range of surface finishing options ideal for precision grinding service. Achieve the desired texture and appearance for your precision parts and components.
more surface finishes

Precision Machining Tolerance Table

Category Metal Plastic
Linear Dimensions +0.01mm 10.05mm
Diameter +0.002mm +0.02mm
Precise Hole +0.002mm +0.02mm
Chamfer Heights +0.02mm +0.05mm
Angular Dimensions +0°5 +19
Straightness +0.002mm +0.02mm
Flatness +0.002mm +0.01mm
Perpendicularity +0.002mm +0.01mm
Symmetry +0.002mm +0.01mm
Concentricity +0.002mm +0.01mm
Parallelism +0.002mm +0.01mm
Tolerances listed here are minimums for an ideal case. Looser tolerances may be required depending on process, material choice, or part geometry.
If you have no detailed requirements for product tolerance, we can follow the following general ISO2768 tolerance table.

Instant & Accurate Quotes

We will thoroughly review each drawing and provide accurate quotes.

We don't use online automated quotation tools, because it is very inaccurate. Online quote platforms rely solely on calculations based on cutting amounts and fixed coefficients, they fail to account for actual processing nuances, such as material deformation after heat treatment, tight tolerance requirements, grinding after heat treatment, etc. Consequently, automated price calculations can lead to inaccuracies, ultimately increasing your costs.

But you can rest assured at DEK!

Our quotations are both cost-effective and accurate because we have a team of professional mechanical engineers who meticulously review each drawing. These engineers boast over 10 years of experience and possess deep expertise in programming, machine operation, post-processing, material properties, and more. Ensure you will get accurate quotes within 6 hours.

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Production Capacity Guarantee

With perfect production and quality process, you can place your order with confidence.

Advanced CNC Machine Shop

DEK has a range of advanced grinding machines, including surface grinders, circular grinders, internal grinders, precision grinders, centerless grinders, ball grinders, ultra-precision grinders and polishers.

These advanced equipments can achieve micron or even nano-scale surface roughness to meet the processing requirements of high-precision parts, such as manufacturing precision molds and optical components. At the same time, they can effectively improve the finish, efficiency and reliability of parts to meet your specific project requirements

Quality Control

We follow a strict quality inspection process including IQPC, QE, OQC, etc. and use CMM, projector, laser interferometer, profilometer, and hardness tester to conduct high-precision dimensional and hardness inspections.

In addition, our quality personnel use surface roughness meters and microscopes to conduct a thorough cosmetic inspection of components to ensure that there are no scratches or burrs. Each component is rigorously inspected at any stage of production to ensure that the final product fully meets your specifications and quality requirements.

Professional Packaging

We generally package our products using plastic bags, rustproof paper and foam, depending on the size and characteristics of the parts. After sealing with tape, we label each package so you can quickly identify the contents.

Once the initial packaging is complete, we will pack it into a 5 ply corrugated box or wooden crate and secure it with pearl cotton or fill it with bubble wrap to prevent damage during transportation. We also attach a packing slip to the outer box to protect your custom machined parts and make it easy for you to inspect and confirm your shipment.

Global Shipping

We cooperate with several international transportation or courier companies and have extensive experience in logistics

We will provide personalized transportation solutions according to your order:
  • For small quantities of products, you can choose DHL, FedEx, UPS and other international express or air transportation to ensure fast delivery;
  • For larger volumes and weights, we will suggest you to use sea freight or trucking to save costs.
  • No matter which mode of transportation you choose, we are committed to providing you with the most convenient and economical logistics services.

    Our Advantages

    2300+ Engineers Love Work With Us


    Our Ordering Process

    Different from the Internet quote platforms, we produce and complete all the details of your parts in our own factory. Each step is professional and reliable, ensuring you can rest assured.
    Send RFQ

    Send RFQ with 2D/3D drawings and detailed requirements via Email or online form.

    Review & Quote

    Our Engineer team will review every drawing carefully and provide an accurate quote within 6 hours.

    Confirm Order

    Confirm the quote, details and delivery schedule, then sign the contract.


    Arrange production process, start programming and machining.

    Quality Control

    Strict quality control during production and final inspection.

    Packaging & Shipping

    Pack the parts, attach part identification labels, and start shipping.

    Send RFQ 222
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    Confirm Order
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    Precision Grinding Services Buying FAQs

    DEK can mainly provide outer diameter grinding, inner diameter grinding, surface grinding and centerless grinding. If you need other types of grinding services, we can also provide them for your project.
    Quotes for precision grinding depend on the material, complexity of the process, volume and additional requirements, among other factors. DEK will provide customized quotations based on your project specifications. Of course, large quantities of products are more affordable.
    There are no minimum order quantities for all DEK machining, whether you are prototyping, low-volume or high-volume production, we are happy to provide a cost-effective solution for your project
    DEK's lead time is determined by the complexity of your project and the production cycle. If your project is simple and the quantity is moderate, then we can usually complete the order within 4-7 days. If your goods are particularly urgent, we will be able to provide you with expedited service, within 3 days to complete the order!
    Our precision grinding services are capable of working with a wide range of materials, including but not limited to metals such as steel, stainless steel, aluminum, brass, copper, and exotic alloys. Additionally, we can handle various non-metallic materials like ceramics and plastics. We have the expertise and equipment to tailor our precision grinding processes to the specific properties of each material, ensuring optimal results.
    We employ a variety of precision grinding processes to meet the diverse needs of our customers. These include surface grinding, cylindrical grinding, centerless grinding, and internal grinding, among others. Our skilled technicians select the most suitable process based on the geometry, material, and desired tolerances of your components.
    Yes, our precision grinding services encompass both external and internal grinding. Whether you require precise surface finishing for external features or intricate grinding for internal dimensions, our advanced equipment and experienced team can handle both aspects with precision and accuracy.
    Typically, we can meet +/-0.005mm, but it depends on material, shape and other design requirements, let's talk more details for an evaluation of your project.
    Yes, our grinding processes are well-suited for large-scale production runs. We have the capacity and efficiency to handle high-volume orders while maintaining consistent quality and precision. Our streamlined processes and modern equipment ensure cost-effective solutions for large-scale projects.
    Yes, we offer rush services for urgent projects that require faster turnaround times. Please contact our team with the details of your project, and we will do our best to accommodate your timeline while maintaining the highest level of quality and precision.

    Get An Accurate Quote For Your Next Projects

    No matter your project is complicated or simple, no matter is metal or plastic, you will get an accurate quotation within 6 hours.

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    Knowledge of  Precision Grinding

    What is Precision Grinding?

    Precision grinding is a highly specialized manufacturing process that achieves exceptional smoothness and accuracy in machine parts and tools. It operates much like sanding, albeit with much greater precision.

    The process involves removing tiny increments of material from the surface until it meets exact specifications. This meticulous refinement ensures that components fit together with absolute precision, enhancing their overall performance and longevity.

    Precision grinding works by using abrasive materials like grinding wheels or belts, which rotate at high speeds and carefully remove layers from the workpiece's surface. This gradual reduction continues until the desired level of smoothness and accuracy is achieved, making it a critical step in industries where even the slightest error can lead to significant problems.

    What are the advantages of Precision Grinding?

    Precision grinding offers numerous benefits in manufacturing and engineering. It ensures exact dimensions, superior surface finish, tight tolerances, durability, and consistent quality. Advantages of Precision Grinding:

    • Exact Dimensions
    • Superior Surface Finish
    • Tight Tolerances
    • Enhanced Durability
    • Consistent Quality