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1. What Is a Bolt?
A bolt is a fastener used to join two or more parts together in mechanical connections. It is typically a cylindrical metal fastener. This small piece forms the foundation of major constructions.
Is it really that important?
Yes! Bolts securely hold various structures and machine parts together.
Thanks to its threaded structure, a bolt provides a strong connection when used with a nut or a screw. Bolts play a crucial role in daily life, from household furniture to vehicle engines, construction structures to electronic devices. Their strength and reliability make them an indispensable part of modern engineering and manufacturing processes.
The properties of bolts depend on factors such as the material used, surface coating, thread structure, and durability. Bolts are usually made from materials such as steel, stainless steel, brass, or titanium, depending on their application. Surface coatings enhance corrosion resistance. For instance, galvanized coating prevents bolts from rusting.
What Is the Difference Between a Bolt and a Screw?
The differences between bolts and screws determine their areas of application. A screw grips directly into the material thanks to its threaded structure, whereas a bolt is typically used with a nut.
Key differences:
Usage Areas:
Bolts, screws, nuts... These are the hidden heroes of modern engineering. But how much do you actually know about them?
Imagine this:
You are constructing a structure and want everything to be perfect. You must use the right fasteners. But how do you determine the correct measurements?
Here’s the answer:
Fasteners cannot be selected without understanding measurement units. Learning this terminology is the first step in choosing the right bolt.
Fasteners, including bolts, screws, nuts, and washers, are fundamental components in machinery and structural assembly. Proper selection and measurement of bolts are critical for connection durability and safety.
Bolt Measurements
Bolt measurements are not just numbers—they determine how strong a structure will be. But how do you choose the right size?
Start with a simple step:
Choosing bolts with the correct dimensions is crucial for the assembly process. An incorrectly sized bolt can result in a weak connection or damage. That’s why determining the right bolt size is essential for engineers and assembly teams.
The measurements vary based on the application. The key bolt dimensions include:
Bolt sizes are typically expressed in metric (M) units.
For example: M8 x 1.25 x 30 means a bolt with an 8mm diameter, 1.25mm thread pitch, and 30mm length. Selecting the correct size ensures optimal performance in its application.
Types of Bolts
Each bolt type is designed for specific applications, and selecting the right one ensures a secure connection.
Bolts vary widely and are manufactured for different purposes. Some common types include:
Each bolt type is optimized for specific applications.
For example, hex bolts are preferred in high-torque environments, while eye bolts are used in lifting and securing operations.
Bolt Standards
Why are bolt standards important?
Standards determine the quality and reliability of bolts. Internationally standardized bolts ensure safe and consistent performance.
The most widely used bolt standards include:
Each standard defines bolt dimensions, materials, and performance properties. Selecting bolts according to these standards ensures compatibility, safety, and durability.
Bolt production consists of several steps, including raw material selection, shaping, threading, heat treatment, and coating. The manufacturing process ensures that the bolt is designed according to its intended application. For example, high-strength bolts are made from steel and undergo heat treatment to enhance durability.
Hot-rolled steels are cut to the required dimensions and then machined on CNC lathes to achieve the final diameter.
To form the head of the bolt, one end of the cut pieces is heated to approximately 1150°C using an induction heating machine. Once the required temperature is reached, the head is pressed into the desired shape (hexagonal, etc.). This process creates a single-piece bolt with no welds or connection marks.
The bolts are then sent to a furnace for flame surface hardening. The primary goal of this process is to increase the bolt’s tensile strength, hardness, and durability.
After the surface hardening process, it’s time for thread cutting. The bolts are placed into thread-cutting machines, where the threading process is completed. Once finished, they are ready for use in various industrial applications according to project requirements.
Steel selection should be based on the conditions the bolt will be exposed to. For example:
The type of steel directly affects the performance and longevity of the bolt.
The most commonly used steel grades for bolt production include:
Hasçelik offers a wide range of bolt steels tailored to industry needs.
Hasçelik provides high-quality and durable steel solutions, offering customized outputs based on customer needs.
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