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FITTER - CITS

Introduction to die and theirs types

1 Definition: A die is a specialized tool used in manufacturing processes, particularly in metalworking, to shape
or cut materials into specific shapes or forms.

Dies are typically made from hardened steel and are designed to withstand the high pressures and forces
involved in the manufacturing process.
They are essential components in various industries, including automotive, aerospace, electronics, and more

Type of dies
1 Solid die : A solid die is a type of die used primarily for cutting or forming operations in metalworking and other
manufacturing processes.

2 Split die : A split die is a type of die used for cutting threads on cylindrical workpieces, such as bolts, screws,
and studs.
3 Adujastable die : An adjustable die, also known as an adjustable round die or adjustable split die, is a
specialized type of threading die used for cutting external threads on cylindrical workpieces.

4 Die nut : The die nut is used for chasing or reconditioning the damged threads. Die nuts are not to be used
for cutting new threads. The die nuts are available for different standards and sizes of threads. The die nut is
turned with a spanner.
5 Die Plate: A die plate, also known as a die shoe or die set, is a critical component in various manufacturing
processes, particularly in metalworking and forming operations.
6 Pipe die : A pipe die is a specialized tool used for threading pipes to create screw threads that allow pipes to
be joined together securely.

7 Chejar die : A chaser die, also known as a thread chasing die, is a tool used for repairing or restoring damaged
threads on bolts, screws, or other threaded components. Instead of cutting new threads like a tap or a die, a
chaser die follows the existing thread pattern and reshapes or cleans up the damaged threads to their original
form.
8 Acrone die : Acorn Cone Dies are Designed with a straight hook angle for production threading work on steel
parts using screw machine or other thearding equipment.
9 Adjustable screw Plate die: This is another type of a two piece die similar to the half die. This provides
greater adjustment than the split die.
The two die halves are held securely in a collar by means of a threaded plate (guide plate) which also acts as a
guide while threading.
When the guide plate is tightened after placing the die pieces in the collar, the die pieces are correctly located
and rigidly held.

Methods of thread cutting by die
1 First prepare the size of the rod on which the thread to be cut .
2. There should be slide chamfer at the end on the rod this makes it easier for the die to climb.

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CITS : CG & M - Fitter - Lesson 7 CITS : CG & M - Fitter - Lesson 7