Die and Die stock
. the different types of dies
. the features of each type die
. the use of each type of die
. name the type of diestock for each type of die
Uses of Dies
Threading die are used to cut external threads on cylindercal workpieces.
The following are the different types of dies
Circular Split Die(button die)
Half die
Adjustable Screw Plate Die
Circular Split Die/Button Die
This has a slot cut to permit slight variation in size. When held in the diestock, variation in the size can be made by using the adjusting screws. The permits increasing or decreasing of the depth of cut. When the side screws are tightened the die will close slightly.
Half Die
Half dies are stronger in construction.
Adjustments can be made easily to increase or decrease the depth of cut.
These dies are available in matching pairs and should be used together. By adjusting the screw of the diestock, the die pieces can be brought closer together or can be moved apart.
They need a special die holder.
Adjustable Screw Plate Die
This is another type of a two piece die similar to the half die.
This provides greater adjustment than the splite die.
The two die halves are held securely in a collor 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 collor, the die pieces are correctly located and rigidly held.
The bottom of the die halves is tapered to provide the lead for starting the thread. On one side of each die head, the serial number is stamped.
Both pieces should have the same serial numbers.
Die Nut
The die nut is used for chasing or reconditioning the damaged threads.
Die nut are not 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.
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