Function, Construction, Working and Specification of Fitting Tools

In the Fitting trade, hand tools are essential for performing various mechanical operations with accuracy and efficiency. To use these tools effectively, a fitter must understand their function, construction, working principles, and specifications. The book “Fitting” provides detailed knowledge of these aspects to help students develop practical skills and technical understanding.

Function of Fitting Tools

The function of a fitting tool refers to the specific purpose for which the tool is used. Each tool is designed to perform a particular task in the workshop. Proper knowledge of tool functions helps in selecting the right tool for the job.

• Measuring Tools: Used for checking dimensions and ensuring accuracy.
• Marking Tools: Used to mark lines and points on the workpiece.
• Cutting Tools: Used to remove excess material.
• Holding Tools: Used to hold the workpiece securely.
• Striking Tools: Used to apply force.
• Threading Tools: Used to create threads on components.

Understanding the function of each tool ensures efficient work and prevents damage to both the tool and the workpiece.

Construction of Fitting Tools

Construction refers to the design and structure of a tool, including the materials used and its components. Most fitting tools are made from high-quality steel to ensure strength, durability, and resistance to wear.

For example:

• Hacksaw: Consists of a frame, blade, and handle. The blade is made of high-speed steel.
• File: Made of hardened steel with teeth cut on its surface.
• Hammer: Consists of a steel head and a wooden or fiber handle.
• Vernier Caliper: Made of stainless steel with main scale and sliding scale.

The construction of tools determines their strength, accuracy, and suitability for different types of work.

Working Principle of Fitting Tools

The working of a tool refers to how it performs its function. Each tool operates based on a specific principle.

• Hacksaw: Cuts material using a reciprocating motion of the blade.
• File: Removes material through abrasion when rubbed against the workpiece.
• Chisel: Cuts metal by shear force when struck with a hammer.
• Vernier Caliper: Measures dimensions using a sliding scale and vernier principle.
• Tap and Die: Create threads by cutting grooves in the material.

Understanding the working principle helps in using the tool correctly and achieving better results.

Specification of Fitting Tools

Specifications refer to the size, capacity, and other technical details of a tool. These details help in selecting the appropriate tool for a specific task.

Some examples of tool specifications are:

• Hacksaw: Blade length (e.g., 250 mm or 300 mm)
• File: Length, grade (rough, smooth), and shape
• Hammer: Weight of the head (e.g., 500 g, 1 kg)
• Vernier Caliper: Range (0–150 mm) and least count (0.02 mm)
• Drill: Diameter and type

Knowing specifications ensures proper selection and accurate performance of tools.

Importance of Understanding These Aspects

Knowledge of function, construction, working, and specifications is essential for every fitter. It helps in:

• Choosing the correct tool for the job
• Improving work efficiency
• Ensuring safety in the workshop
• Maintaining tools properly

Without this knowledge, it is difficult to perform fitting operations accurately.

Application in Workshop Practice

In workshop practice, fitters use different tools for various operations such as marking, cutting, filing, drilling, and assembling. Each operation requires specific tools with proper specifications.

For example, while marking a job, a fitter uses a scriber and try square. During cutting, a hacksaw is used. For finishing, files of different grades are used. Proper understanding of tools ensures smooth workflow and high-quality output.

Care and Maintenance of Tools

Proper care and maintenance are essential for increasing the life of tools and ensuring their efficiency. Tools should be cleaned after use, stored properly, and protected from rust.

• Keep tools clean and dry
• Sharpen cutting tools regularly
• Apply oil to prevent rust
• Store tools in proper toolboxes

Well-maintained tools provide better performance and reduce effort.

Safety Considerations

Safety is an important aspect while using fitting tools. Improper use can lead to accidents and injuries.

• Use the correct tool for each operation
• Wear protective equipment
• Inspect tools before use
• Avoid using damaged tools

Following safety precautions ensures a safe and productive working environment.

Conclusion

The chapter on Function, Construction, Working and Specification is essential for understanding fitting tools in detail. It helps students gain knowledge about how tools are designed, how they work, and how they should be used.

By mastering these concepts, students can improve their technical skills and perform fitting operations with accuracy and confidence. This knowledge forms the foundation for becoming a skilled and professional fitter.