Collapsing Taps

Collapsing Taps

Collapsing Taps - There are two types of taps:

(i) Solid taps

(ii) Collapsing taps

Collapsing taps are similar to self opening die heads in that the cutting elements collapse inward automatically when the thread is completed. This permits withdrawing the tap from the workpiece without the necessity of unscrewing it from the thread as in solid taps.

They can be either self setting for use in automatic machines, or require manual setting for each cycle. Two types of collapsing taps are available. The one with radial cutters generally is used for smaller size threads, whereas the type having circular cutters is used for larger sized threads.

Collapsing Taps are internal thread cutting tools in which the chasers or cutting elements automatically withdraw from the work at the completion of the thread, making reversal of the machine unnecessary. These tools save the reversal time of solid taps.

The chasers, made in sets of three or more, can be easily removed for resharpening and can also be quickly and accurately adjusted to size. These taps with suitable chasers will cut either right or left hand threads, straight or tapered, in a range of diameters within the rated capacity of the tool.

Stationary collapsing taps are particularly suited for hand operated machines or other similar applications where the tap does not rotate. A closing handle or other means is provided for resetting the tool. The tap bodies are provided with either a hand trip or a trip plate.

The taps provided with a trip plate are adjustable to govern the length of thread to be cut. Hand trips are suitable where the construction of the part is such that it is desirable to both trip and reset the tap by hand. It may also be used as a lever trip by having the closing handle, contact a stop on the machine.

Stationary Collapsible Taps with Trip Plate and Hand Trip For Receding the Tap

Rotary collapsing taps are especially designed for use on multiple spindle automatics and drilling machines or where it is necessary to open and close the tap automatically. The taps are opened automatically by either a plate trip or sleeve trip.

Taps provided with a trip plate are adjustable to govern the length of thread to be cut. Resetting requires a yoke arranged to contact the rear face of the movable outer sleeve of the tap.

Tripping by the sleeve trip is particularly desirable for multiple spindle automatics, threading machines, and similar applications. Both tripping and resetting are by means of a yoke operating in the groove of the outer sleeve of the tap.