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Surface Finishing：The application of knurling and CD patterns

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knurling CD Pattern production
Knurling and CD Pattern are common surface treatment processes in metalworking. The former focuses on practical functions, while the latter emphasizes decorative aesthetics, and both are widely used in the design and production of various metal products.

1. Knurling: A Practical Choice for Anti-Slip and Assembly

 
Knurling is a process where a toothed knurling wheel presses against the surface of a metal workpiece, causing plastic deformation of the surface layer to form concave-convex textures. Its patterns mainly include straight knurling, cross knurling, and diagonal knurling: straight knurling is suitable for parts requiring axial sliding (e.g., sleeves), cross knurling offers the best anti-slip effect (commonly used on knobs and handles), and diagonal knurling balances anti-slip performance with aesthetics.
In daily life, knurling is applied to watch crowns, screwdriver handles, and machine tool operation handwheels. It not only ensures a firm grip but also enhances the fit tightness between parts during assembly—for example, the connection between a knurled shaft and hole can transmit torque without additional key structures.
Knurling Aluminum Formexfabtech

2. CD Pattern: A Decorative Tool for Light and Shadow Texture

CD Pattern, also called laser pattern (named for its resemblance to the texture on CD discs), is a process where fine concentric circular lines are engraved on metal surfaces using a CNC lathe or laser cutting. Its lines are extremely fine, and when light hits them, they refract to create gradient light and shadow effects, showing different gloss levels from different angles for an exquisite texture.
 
CD Pattern is often seen on the side edges of mobile phone middle frames, metal panels of power banks, interior knobs of cars, and high-end fountain pen bodies. It not only boosts product appearance but also conceals minor processing marks on metal surfaces. When combined with processes like anodization or electroplating, its light and shadow effects become even more striking.
CD Pattern
 
Knurling and CD Pattern can also be used together in products.
 
  • Purpose: Knurling prioritizes practical needs such as anti-slip and assembly; CD Pattern focuses on enhancing the visual texture of products.
  • Touch and Form: Knurling features concave-convex three-dimensional textures with a rough touch; CD Pattern consists of fine grooves with a smooth touch.
  • Accuracy Requirements: Knurling has loose accuracy requirements with relatively deep textures; CD Pattern requires high-precision CNC equipment with shallow, dense lines.
  • Material Compatibility: Knurling is suitable for metals with good plasticity (e.g., aluminum, copper); CD Pattern can be used on harder metals (e.g., stainless steel, titanium alloy).
Knurled factory

 

If you are looking for a reliable partner, please feel free to contact us.FORMEXFABTECH primarily offers machining services for various product designs.

 

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