What Are Knurled Parts?
Knurled parts are widely used in CNC machining to improve grip, positioning, and assembly performance. Knurling is a forming process in which patterned rollers press into the surface of a workpiece to create regular textured patterns, rather than removing material.
This process is commonly applied to cylindrical components and is especially effective for parts that require manual handling, anti-slip surfaces, or press-fit connections.
How Knurling Works
Knurling is performed by pressing hardened knurling wheels against a rotating workpiece on a lathe. The material is displaced to form a consistent pattern.
Key process parameters include:
Pressure
Spindle speed
Feed rate
Coolant control
Unlike cutting operations, knurling maintains material integrity while improving surface functionality.
Common Types of Knurling Patterns
1. Straight Knurl
Parallel lines along the axis
Suitable for linear grip applications
2. Diagonal Knurl
Angled pattern in one direction
Used for decorative or light grip purposes
3. Diamond Knurl
Crossed diagonal lines forming a diamond pattern
Most widely used due to excellent anti-slip performance
Advantages of Knurled Components
Improved grip and handling safety
Enhanced visual appearance and texture
Better press-fit and assembly stability
Cost-effective and efficient process
No material removal, maintaining part strength
Limitations of Knurling
Mainly suitable for cylindrical surfaces
May cause slight deformation if improperly controlled
Requires precise setup and tooling alignment
Tool wear needs to be monitored in mass production
Applications of Knurled Parts
Knurled components are widely used across industries:
Industrial equipment and tools
Automotive components
Medical devices
Consumer electronics
Mechanical assemblies
