Exploring the Various Types of Fasteners and their Role in CNC Machining--cncmass.com(kinds of spring Dave)

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CNC machining, an abbreviation for Computer Numerical Control machining, is a widely used manufacturing process that involves the use of computerized controls to operate and manipulate machine tools. This article delves into the significance of fasteners in CNC machining, highlighting different types, their functions, and how they are produced.

Types of Fasteners:

1. Bolts and Screws:
Bolts and screws are crucial components when it comes to fastening two or more parts together in CNC machining processes. These threaded fasteners provide secure connections due to their ability to grip surfaces tightly. The production of bolts and screws often involves precision techniques such as cold heading, where metal wires are cut, heated, shaped, and formed into the desired thread pattern.

2. Nuts:
Nuts complement bolts and screws by providing a threaded hole for them to be tightened onto. These cylindrical shaped fasteners come with internal threads and can be made from various materials such as steel, brass, or nylon. Producing nuts typically entails machining operations like turning or milling, creating precise threads on the inside.

3. Washers:
Washers act as spacers between fasteners and the surface being fastened, distributing loads and reducing friction. They are usually flat and round with a hole in the center. Washer production generally involves stamping processes, where a large sheet of material is pressed precisely to form individual washers.

4. Rivets:
Rivets are permanent fasteners commonly used when joining materials that cannot be easily disassembled. These pins-like fasteners consist of a smooth cylindrical shaft, a head, and a tail. Cold forming processes like solid riveting or impact extrusion are employed during their production, ensuring a tight and durable connection.

5. Anchors:
Anchors play a vital role in securing objects to various surfaces. They are commonly used in CNC machining applications that involve attaching heavy or hanging objects onto walls, ceilings, or floors. Anchors can be made from materials such as plastic, metal, or concrete and are produced through casting or molding techniques.

Production Techniques:

The production of fasteners for CNC machining involves a range of manufacturing methods tailored to specific types of fasteners:

1. Machining: Fasteners like screws, nuts, and washers are often manufactured using turning, milling, or drilling processes. These techniques involve removing material from a larger piece until the desired shape and threads are achieved.

2. Cold Heading: Preferred for bolt production, cold heading incorporates the shaping of metal wires into fastener blanks by applying pressure without heating the material. This technique ensures precise dimensions and quality control.

3. Stamping: Washers and certain types of rivets undergo stamping, a process where flat sheets of material are compressed between two dies under high force. The die shapes cut and form individual fasteners simultaneously, providing efficiency in large-scale production.


Fasteners play a critical role in CNC machining, ensuring secure connections and facilitating the assembly of multiple components. Bolts, screws, nuts, washers, rivets, and anchors are just a few examples of the different types available, each serving specific purposes in various applications. Understanding the importance of these fasteners and their production techniques allows CNC machinists to create reliable and efficient products while achieving optimal functionality and performance. CNC Milling CNC Machining