Try Square – Types, Parts, Materials and Uses in ITI Turner Trade

In the ITI Turner trade, accuracy and precision are essential for producing quality components. One of the most important measuring and checking tools used in workshop practice is the try square. It is widely used for checking squareness and marking right angles on workpieces. This chapter explains the types, parts, materials, and uses of the try square in detail.

Introduction to Try Square

A try square is a hand tool used to check the accuracy of right angles (90°) and to mark perpendicular lines on a workpiece. It is commonly used in fitting, carpentry, and machining operations.

In the Turner workshop, the try square is used to ensure that surfaces are properly aligned and perpendicular, which is important for accurate machining.

Construction of Try Square

A try square consists of two main parts joined together at a right angle:

• Blade: The long, thin part used for marking and checking
• Stock: The thicker part that is held against the workpiece

The blade is fixed into the stock in such a way that they form an exact 90° angle.

Parts of a Try Square

The main parts of a try square include:

• Blade: Used for marking lines and checking squareness
• Stock (Handle): Provides support and grip
• Rivet or Pin: Joins the blade and stock

Material Used for Try Square

The try square is made from high-quality materials to ensure durability and accuracy:

• Blade: Made of hardened and tempered steel for wear resistance
• Stock: Made of cast iron, steel, or sometimes wood

The materials are selected to maintain rigidity and ensure that the 90° angle remains accurate over time.

Types of Try Squares

1. Engineer’s Try Square

This type is commonly used in metalworking. It is made entirely of steel and provides high accuracy.

2. Carpenter’s Try Square

Used in woodworking, it has a wooden stock and steel blade. It is less accurate compared to the engineer’s try square.

3. Adjustable Try Square

This type allows adjustment of the blade angle. It is used in special applications where flexibility is required.

4. Combination Square

A versatile tool that can be used as a try square, depth gauge, and angle measuring tool.

Uses of Try Square

The try square is widely used in workshop operations:

• Checking squareness of surfaces
• Marking perpendicular lines
• Testing the accuracy of machined components
• Setting up workpieces for machining

Method of Using Try Square

The correct method of using a try square is as follows:

• Place the stock firmly against the reference surface
• Align the blade along the edge of the workpiece
• Check for gaps between blade and surface
• Use a scriber to mark lines if required

Proper handling ensures accurate results and prevents measurement errors.

Accuracy and Care

The accuracy of a try square depends on its proper use and maintenance. Even a small deviation can lead to errors in machining.

• Avoid dropping the tool
• Keep it clean and free from rust
• Do not use it as a hammer or lever
• Store it properly after use

Advantages of Try Square

• Simple and easy to use
• Provides quick checking of right angles
• Useful for marking and inspection

Limitations of Try Square

• Limited to checking 90° angles only
• Accuracy depends on user skill
• Not suitable for very high precision measurement

Application in Turner Workshop

In the Turner trade, the try square is used to check whether the faces of workpieces are perpendicular to each other. It is also used during marking and layout operations to ensure correct alignment before machining.

Accurate use of the try square helps in producing components with proper dimensions and alignment.

Safety Precautions

While using the try square, the following precautions should be taken:

• Handle the tool carefully
• Avoid using damaged or bent squares
• Keep fingers away from sharp edges

Conclusion

The try square is an essential measuring and marking tool in the ITI Turner trade. It plays a key role in ensuring accuracy and precision in workshop operations.

Understanding its types, parts, materials, and uses helps trainees perform their tasks effectively and produce high-quality work.

In conclusion, mastering the use of the try square is important for every Turner, as it forms the basis of accurate measurement and alignment in machining processes.