Custom Knurling Services

JIAHUI’s Custom Knurling Services exemplify precision and quality, where every detail is a testament to our commitment. Our process begins with a comprehensive consultation, delving into your exact knurling requirements. We meticulously consider factors like pattern design, pitch, and depth to ensure the final product aligns perfectly with your vision.

With an emphasis on quality, our skilled technicians employ advanced machining techniques. Our state-of-the-art equipment, coupled with years of expertise, guarantees flawless execution. The knurling process involves controlled pressure and precise rotations, resulting in consistent and well-defined patterns.

  • Uncompromising Criteria
  • Experiential Approach
  • Vision and Precision
Knurling -

What’s Knurling Process?

Knurling is a precision engineering process that involves creating a textured pattern on the surface of a workpiece, typically cylindrical. The process unfolds in several distinct steps. It commences with carefully selecting the workpiece that will undergo knurling, coupled with the decision regarding the specific knurling pattern to apply. Patterns vary widely, from intricate diamond designs to straightforward straight-line configurations, based on the intended application and aesthetic preferences.

After preparation, the chosen workpiece is securely fixed within specialized machinery, such as a lathe, to ensure stability during the procedure. The critical element in the process is the knurling tool itself, which consists of a pair of wheels, each featuring a negative impression of the intended pattern. As the workpiece rotates, the knurling tool is pressed against it, causing the wheels to embed the chosen pattern onto the surface through a combination of pressure and rotational movement.

Our Qualification For Knurling Service

At JIAHUI, we specialize in knurling CNC lathe parts, primarily focusing on metal materials such as steel, brass, and aluminum alloys. Additionally, we extend our knurling expertise to rigid plastics, creating visually appealing and grip-enhancing textures. Knurled patterns play a pivotal role in facilitating ease of handling compared to smooth surfaces.

A prevalent application of knurling lies in producing knurled nuts, encompassing materials like brass, steel, and plastic. These nuts find widespread usage across diverse sectors, including the automotive industry, electrical components, electric appliances, and medical devices.

Our dedication to ensuring customer contentment motivates us to provide all-encompassing solutions, spanning from prototyping to personalized project low-volume production. Embracing a customer-centric approach and emphasizing quality, we ensure that each knurled piece meets stringent standards. JIAHUI stands as your reliable partner in achieving exceptional knurling outcomes.

Manufacturing Process

Knurling manufacturing involves securing metal or hard plastic workpieces, such as nuts, in a lathe. A specialized knurling tool is pressed against the rotating workpiece, creating a textured pattern through pressure and rotation.

Knurling-Manufacturing Process -
Material Weight Size Limit Surface Finish Tolerance
Stainless Steel 50g-300KG ø115mmx1000mm Ra.3.2µm~0.4µm ±0.05mm
Steel 50g-300KG ø115mmx1000mm Ra.3.2µm~0.4µm ±0.05mm
Magnesium Alloy 3g-5KG ø115mmx1000mm Ra.3.2µm~0.4µm ±0.05mm
Copper Alloy 3g-3KG ø115mmx1000mm Ra.3.2µm~0.4µm ±0.05mm

Our Knurling Production Capabilities

Our extensive capabilities encompass top-tier knurling services. We meticulously craft knurled components and materials safeguarded by our consistently updated quality systems. In alignment with the latest ISO industry benchmarks, JIAHUI upholds its reputation as an efficiently managed entity, fostering pride among employees, suppliers, and valued customers.

Materials for Knurling Parts

The art of knurling finds its canvas on an array of materials. Our expertise spans multiple domains, including metals like steel, brass, and aluminum alloys, each bringing unique characteristics to the knurled surface. This diverse range of materials caters to various industries and showcases our adaptability and precision in transforming smooth surfaces into textured wonders.

  • Stainless Steel
  • Aluminum
  • Copper
  • Carbon Steel

Stainless Steel - Steel

Stainless steel is metal-enriched with chromium elements (11%) and a small amount of carbon. Chromium offers corrosion resistance to stainless steel. Due to this, the die-cast parts are less likely to be affected by rust or corrosion. It can be easily molded into several forms. Thus, manufacturers prefer it for the die-casting process.


  • Extremely durable
  • High tensile strength
  • Corrosion resistant
  • Easy fabrication and formability
  • Low maintenance cost



The distinctive characteristics of aluminum make it one of the best materials for die-casting. The major aluminum alloys are A360, A380, A390, A413, ADC12, and ADC1. Among all, the A380 is the most worthwhile aluminum alloy.


  • Excellent corrosion resistance
  • Lightweight
  • High strength and hardness
  • Outstanding thermal conductivity
  • High electrical conductivity
  • Remarkable EMI and RFI shielding properties



Copper is a reddish-orange metal with a face-centered cubic structure that is highly valued for its aesthetics. It exhibits remarkable properties, yet, it can be alloyed with different elements, such as aluminum, tin, zinc, nickel, etc., to improve its characteristics further. The following are some fundamental properties of copper that make it ideal for producing die-casting parts.


  • Very soft
  • An excellent conductor of heat and electricity
  • Good corrosion resistance
  • High ductility
  • Fine malleability


Carbon Steel - Steel

Carbon steel is famous for its low cost and versatile nature. Typically, carbon steel is divided into three categories, i.e., low-carbon, medium-carbon, and high-carbon steel. The properties of these types differ according to the carbon content present in the material. Low-carbon steel is known for its good machinability and weldability, whereas high-carbon steel is used in high-strength applications.


  • Very hard
  • Ductile and malleable
  • Relatively low tensile strength
  • Good machinability
  • Low cost


Surface Treatment For Knurling Parts

By integrating knurling with the proper surface treatment, we not only elevate the tactile experience but also safeguard against wear and tear, extending the lifespan of knurled components. Our dedication to providing top-quality solutions is reflected in our mastery of surface treatment techniques.



Anodizing_Knurling -

Anodizing improves corrosion resistance, enhancing wear and hardness and protecting the metal surface. This surface finish is widely used in mechanical parts, aircraft, automobile parts, and precision instruments.

Aluminum, Magnesium, Titanium, Zinc

Clear, Black, Grey, Red, Blue, Gold, White, Silver, purple

Smooth, Matte finish

Powder Coating

Powder Coating_Knurling -

Powder coating in surface treatment is a dry finishing process where a fine powder is electrostatically applied to a surface. The coated object is then cured under heat, melting the powder particles and forming a durable, smooth, uniform coating.

Aluminum, Magnesium, Titanium, Zinc, Copper, Stainless Steel, Steel

Black, Grey, White, Yellow, Red, Blue, Green, Gold, Vertical stripe

Smooth, Matte finish


Electroplating_Knurling -

Electroplating in surface treatment is when a metal coating is applied to a conductive surface through an electrochemical reaction. It involves immersing the object to be plated in a solution containing metal ions and using an electric current to deposit a metal layer onto the surface.

Aluminum, Magnesium, Titanium,Zinc, Copper, Stainless Steel, Steel

Clear, White, Black, Grey, Red, Yellow, Blue, Green, Gold, Silver, Bronze

Smooth, Semi-matte, Matte finish


Polishing_Knurling -

Polishing is the process of creating a shiny and smooth surface, either through physical rubbing of the part or by chemical interference. This process produces a surface with significant specular reflection but can reduce diffuse reflection in some materials.

Aluminum, Magnesium, Titanium, Zinc, Copper, Stainless Steel, Steel


Smooth, Mirror finish

Laser Carving

Laser Carving_Knurling -

Laser carving is a surface treatment method that utilizes laser technology to remove material from a surface, creating intricate designs, patterns, or text. It provides precise and customizable engraving on various materials, enhancing aesthetics and adding a personal touch to the surface.

Stainless Steel, Fe-based Alloy Steel, Copper Alloy, Nickel-base Alloy, Titanium, Hard Alloy

Clear, Black, Grey, White, Yellow, Red, Blue, Green, Gold, Silver, Purple

Smooth, Matte finish

Excellent Knurling Services

Unlock the potential of your projects with our quality knurling service, driven by a dynamic workforce and innovative solutions.

Typical Knurling Products

Knurling -

FAQs Related To Knurling

A: Knurling is a process of creating a pattern of ridges or grooves on the surface of a workpiece to improve its grip or aesthetics. There are several methods of knurling processing. Here are a few common ones:

  1. Single Point Knurling: This is the most basic method of knurling. It involves using a single-point knurling tool with a hardened, serrated wheel. The tool is pressed against the rotating workpiece, creating the knurl pattern as the wheel cuts into the surface. Single-point knurling can be done on both manual and CNC machines.
  2. Diagonal Knurling: Diagonal knurling is a variation of single-point knurling. This method sets the knurling wheel at an angle (typically 30 to 45 degrees) to the workpiece. This creates a diagonal pattern of ridges, which can provide a better grip and reduce the tendency for the workpiece to move or rotate.
  3. Form Knurling: Form knurling involves using a set of knurling wheels or dies that have the desired knurl pattern already formed on them. The workpiece is pressed between the knurling wheels or dies, creating the knurl pattern on the surface. Form knurling is often used for mass production, allowing for faster and more consistent knurling.
  4. Roll Knurling: Roll knurling is a method where the knurling pattern is formed by rolling the workpiece between two knurling wheels. The knurling wheels have the desired pattern cut into their surfaces, rotating in opposite directions to create the knurl pattern on the workpiece. Roll knurling is commonly used for larger workpieces or when a high volume of knurling is required.
  5. Push Knurling: Push knurling is a manual method where a knurling tool is manually pressed against the workpiece, creating the knurl pattern. This method is often used for small or delicate workpieces that cannot be knurled using other methods.

The choice of knurling method depends on factors such as the type of workpiece, the desired knurl pattern, the production volume, and the available equipment. Each method has its advantages and limitations, and the selection should be based on the specific requirements of the knurling application.

A: Knurling knives, also known as knurling wheels or knurling dies, are the tools used in the knurling process to create the desired pattern on the workpiece. They could be classified based on various factors. Here are some common classifications of knurling knives:

  1. Shape: Knurling knives come in different shapes to create different knurl patterns. The most common shapes include straight, diamond, diagonal, and serrated. Each shape creates a distinct pattern of ridges or grooves on the workpiece surface.
  2. Pitch: The pitch of a knurling knife refers to the distance between individual serrations on the cutting surface. Knurling knives are available in different pitch sizes, allowing for the creation of various knurl patterns with different densities and depths.
  3. Material: Knurling knives are typically made from high-speed steel (HSS), carbide, or tool steel. The choice of material depends on factors such as the hardness of the workpiece material, the desired knurl pattern, and the expected tool life.
  4. Diameter: Knurling knives come in various diameters, which determine the width of the knurl pattern they create. Different diameters allow for the creation of knurl patterns of different widths, accommodating different grip requirements and aesthetic preferences.
  5. Coating: Some knurling knives may have a coating on the cutting surface to reduce friction, enhance their durability, and improve the quality of the knurling process. Common coatings include titanium nitride (TiN) and diamond-like carbon (DLC).
  6. Type of Knurling: Knurling knives can also be classified based on the type of knurling process they are designed for. For example, knurling knives are designed explicitly for single-point knurling, diagonal knurling, form knurling, or roll knurling.

It's essential to select the appropriate knurling knife based on the specific knurling requirements, such as the desired pattern, the workpiece material, and the knurling method being used. Proper selection ensures optimal performance and quality in the knurling process.

A: The depth of knurling teeth, also known as the knurl pitch depth or height, is influenced by several factors. Here are some of the key factors that affect the knurling tooth depth:

  1. Knurling Tool Design: The design of the knurling tool, including the shape and pitch of the knurling teeth, directly affects the depth of the knurling pattern. Different tool designs will create different tooth depths. Knurling tools with deeper teeth will produce deeper knurl patterns.
  2. Pressure Applied: The amount of pressure applied to the knurling tool during the knurling process can affect the depth of the knurling teeth. Higher pressure can result in deeper teeth, while lower pressure may result in shallower teeth.
  3. Workpiece Material: The hardness and ductility of the workpiece material can also impact the depth of the knurling teeth. Softer materials, such as aluminum or plastic, tend to allow for deeper knurling tooth depths. In contrast, harder materials, like stainless steel, may limit the achievable tooth depth.
  4. Knurling Speed: The speed at which the knurling tool moves across the workpiece can influence the tooth depth. Higher rates can result in shallower teeth, while slower speeds may allow deeper teeth.
  5. Lubrication: Lubrication during the knurling process can affect the tooth depth. Lubrication can reduce friction and heat, allowing for smoother knurling and potentially deeper teeth.
  6. Machine Rigidity: The stiffness and stability of the knurling machine or tool setup also affects tooth depth. A stiffer setting provides greater control and consistency, resulting in more accurate and even tooth depth.

It's important to note that the depth of the knurling teeth should be chosen carefully based on the intended application and requirements. Too shallow teeth may not provide sufficient grip, while excessively deep teeth may cause excessive stress on the workpiece or compromise its structural integrity.

A: Knurling patterns refer to the texture or design created on the surface of the workpiece during the knurling process. There are several common types of knurling patterns, including:

  1. Straight Pattern: In the straight pattern, the knurling teeth are aligned parallel to each other, creating straight ridges or grooves on the workpiece surface. This pattern often provides better grip on cylindrical objects like handles or knobs.
  2. Diamond Pattern: The diamond pattern consists of knurling teeth arranged in a diamond-shaped grid. This pattern provides a more secure grip on the workpiece and is commonly used for enhancing the appearance and functionality of various objects.
  3. Diagonal Pattern: The knurling teeth are arranged diagonally in the diagonal pattern, resulting in a crisscross pattern on the workpiece surface. This pattern offers a strong and secure grip and is often used for applications that require extra slip resistance.
  4. Serrated Pattern: The serrated pattern features knurling teeth with small notches or serrations along their length. This pattern provides an aggressive grip and is commonly used in applications where a firm hold is essential, such as on tools or machinery handles.
  5. Custom/Textured Patterns: Knurling can also be done to create custom or textured patterns based on specific design requirements. These patterns can be unique and varied, adding aesthetic appeal to the workpiece or serving particular functional purposes.

The choice of knurling pattern depends on the intended application, the desired grip requirements, and the aesthetic preferences. Different patterns offer varying levels of grip and can create different visual effects on the workpiece surface.

A: Knurling tool collision can occur due to various reasons, including:

  1. Improper Tool Setup: If the knurling tool needs to be properly mounted or secured in the knurling machine or tool holder, it can become misaligned or loose during the operation. This misalignment can lead to tool collision with the workpiece or other parts of the machine.
  2. Incorrect Tool Size or Shape: Using a knurling tool unsuitable for the workpiece or the desired knurling pattern can result in tool collision. If the tool is too large or too small for the workpiece, it may collide with the surface or adjacent areas, causing damage.
  3. Excessive Feed or Pressure: Applying excessive feed or pressure during the knurling process can cause the tool to collide with the workpiece. This can happen if the feed rate or pressure is set too high or if there is a sudden increase in pressure due to a malfunction or operator error.
  4. Workpiece Misalignment: If the workpiece is not properly aligned or secured in the knurling machine, it can lead to tool collision. Misalignment can cause the tool to hit the workpiece at an angle or collide with other machine parts.
  5. Machine Malfunction: Mechanical issues or malfunctions in the knurling machine can also result in tool collision. This can include problems with the tool holder, feed mechanism, or other components that affect the movement and positioning of the knurling tool.

To prevent tool collision, it is essential to ensure proper tool setup and alignment, use the correct tool size and shape for the application, and carefully set and monitor the feed rate and pressure. Regular maintenance and inspection of your knurling machine could help identify and resolve any potential malfunctions or issues that could lead to tool collisions.

A: The choice of material for the knurling mold depends on several factors, including the type of knurling operation, the workpiece material, and the desired knurling pattern. Here are some common materials used for knurling molds:

  1. High-Speed Steel (HSS): HSS is a popular choice for knurling molds due to its excellent hardness, wear resistance, and heat resistance. It can withstand the high forces and friction generated during the knurling process. HSS molds are suitable for knurling softer materials like aluminum, brass, and mild steel.
  2. Tool Steel: Tool steels, such as D2 or A2, are commonly used for knurling molds that require high strength and durability. These steels offer good hardness and toughness, making them suitable for knurling operations on harder materials like stainless steel or hardened steel.
  3. Carbide: Carbide is a tough, wear-resistant material that can withstand high temperatures. It is often used for knurling molds that involve high-speed or heavy-duty operations. Carbide molds are suitable for knurling hard materials like cast iron or heat-treated steel.
  4. Diamond: Diamond knurling molds are used for specialized applications that require extremely fine or intricate knurling patterns. Diamond molds offer exceptional hardness and durability, allowing for precise and long-lasting knurling on various materials.

The mold material selection should consider factors such as the workpiece material hardness, the desired knurling pattern, the expected tool life, and the operating conditions. It is best to consult with tooling experts or manufacturers to determine the most suitable material for your specific knurling application.

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