You will need
- - detail;
- - die;
- - knob;
- - engine oil.
The internal thread is cut with a tap, a die. As a rule, often there is a need to cut the external thread. For this you will need a rod, on which you will cut thread, die and tap wrench for her.
Remember that the diameter of the rod shall be equal to the diameter of the future thread. Secure the piece in a vise, preferably vertically. Insert the die into the ratchet and secure it. Now attach the die to the end of the rod, making sure that there are no distortions, it is very important.
Right hand thread is cut by rotating the knob clockwise, left – anticlockwise (for this thread should be relevant and die). The die should rotate smoothly, without jerks. Its working surface be sure to lubricate with engine oil.
For threading formed chip, it is necessary to regularly remove, slightly turning the die in the opposite direction. As a rule, after the die is cut some of the threads, and further work is already underway simply.
If there is no handle for the dies, you can hold her usual gas key. But in this case it is much harder to start the thread without bias, therefore, observe the exact position of the die, avoid bending the key. The slightest imbalance can ruin all the work.
What if the diameter of the workpiece is more than the required thread size? In this case the rod need to be turned on a lathe to the required diameter. If you hold the part in the lathe is not impossible, it is possible to grind it on a conventional electric press, but this work requires great care. Control caliper the diameter of the rod, ensure that it has been strictly cylindrical. The quality of workpieces depends on the reliability of the future thread.
Sometimes, it is the first time to begin proper cutting, carving turns are skewed. In this case, remove the die and knock the already cut area of the thread with a hammer, then repeat the cutting. Since the beginning of the thread usually is not loaded with a work station, it is quite acceptable.
Advice 2: How to cut a thread on the pipe
The ability to cut threads on pipes is a fairly useful skill. However, in our modern apartments cut into the threads very often. Therefore, it is enough to get a normal plumbing vise and knob set of dies. The size and material is selected for thread cutting dies depends on the properties of that particular pipe.
At the end of any die has to be crammed stamp reflecting the necessary information. Note the steel grade of the dies and thread designation. The thread is left and right, so that the brand can meet the appropriate letter symbols ("R" or "L"), indicating the direction of the thread.
If you need to cut threads in a pipemade from high-strength stainless steel, then you will need a die of appropriate diameter marked R18. Even better to use the die marked R18F2, where "F2" denotes that the tool steel contains up to 2% vanadium acts as an alloying additive. In the absence of the listed dice will fit steel die stamps P9, which is quite common.
The dies can also be cut or uncut (solid). The first will allow you to achieve precision, by passing the thread in several passes with parallel adjustment of the thread diameter with the locking screw knob.
This files most often for threading the pipes are used round dies, although for threading manually often use a sliding die, fixed in a special oblique die stock and having numbers from one to six.
Want to know how to cut thread? It's not difficult. Take any driver, it pick up the die for cutting the desired thread on the pipe of the necessary diameter. Insert the die into the ratchet and secure it there by tightening the bolts two or three sides. The tube should hold in a Vice, wrapping it if necessary, something soft (such as cloth). Install the die to the pipe end and start to rotate, simultaneously pressing: start to cut carving. After reaching the desired mark, simply Unscrew the die back. If the die is a little tight going back again scrolling to the end of the thread, turning it back and forth a few times in particularly difficult areas. That's all.