Why Knurling Widely Used in Rapid Prototype?

SG Prototype offers a diverse range of finishing techniques, and knurling is one of our most specialised. Knurling is the process of applying a tool to press onto cylindrical components, creating customizable surface patterns that feel good and prevent slipping. By mounting the knurling wheel onto a motorised tool turret, the operation can be performed immediately after turning, ensuring precise pattern alignment.  

I. Types of Knurling

Knurling patterns are determined by the profile of the knurling wheel and are primarily categorised into these types:

Straight knurling: Parallel or linear patterns

Diagonal Knurling: Single-direction spiral patterns

Diamond knurling: Diamond-shaped patterns

Crisscross Knurling: Vertical cross, square grid patterns

II. Our Case Studies

SG Prototype has extensive experience in knurling processes. During machining, we allow for a diameter increase of 0.05–0.2mm in workpieces. It is essential to leave a machining allowance in precision assembly design to ensure accuracy. Below are images of our knurled prototypes.

III. Application of Knurling

Functional Validation: Regular raised and recessed textures significantly enhance surface friction coefficients, providing realistic test conditions for anti-slip performance evaluation.

Appearance and Texture Evaluation: Knurling patterns endow prototypes with the same surface characteristics as mass-produced parts, reducing the risk of design changes in the later stage.

Contact us to obtain precise quotations and technical advice incorporating knurling processes for your prototyping projects. Submit your 3D drawings and technical specifications. Our engineering team will provide a detailed manufacturing feasibility analysis and quotation within 24 hours.