Which one of the following is used to rectify damaged or rusted threads?

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ALP CBT 2 Fitter Previous Paper: Held on 23 Jan 2019 Shift 1

Answer 1

Explanation:

The threading dies are used to cut external threads on the cylindrical workpieces.

The following are the different types of dies:

Circular split die/ button die	This has a slot cut to permit a slight variation in size. When held in the diestock, variation in the size can be made by using the adjusting screws. This permits increasing or decreasing the depth of the cut. This type of die stock is called button pattern stock.
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 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. This type of die stock is called quick cut die stock.

Die Nut (Solid Die)