Types of crane-box - understand the design and compare the

The crankshaft can be considered the main element of any crane, it is this simple design that is responsible for the fact that when the valve is turned, the water supply is blocked. When choosing a particular model, it is necessary to take into account not only the geometrical dimensions, but also the operating conditions of this device. The proposed material will allow you to understand what a crane is, its structure and principle of operation, as well as help in choosing.

Types of faucet bush

As for the classification, depending on the design can be distinguished:

• devices with a worm connection, during operation, the rod simply extends and closes the passage through which water entered. Worm crane is a classic, most of the old devices belong to this category.

Note! To understand that this type of axle box is used in the tap can be determined by how many turns you need to do before the overlap of water. In worm models, the stock goes down smoothly, so you need to make a few full turns.

• Ceramic - not all the device is made of ceramics, but only 2 discs, which are the locking element. The price is slightly higher than that of the worm counterpart, but ceramic discs wear out very slowly, besides, the valve can be closed almost instantly, just turning the knob about 90 ?;

• Note worth more and ball devices. Ball valve-axle box differs from the above in that the usual metal ball with a through hole acts as a locking element. As well as the ceramic version allows you to quickly block the flow of water.

In general, the design of the crane-axle boxes from different manufacturers remains the same, only individual parts are changed in order to increase durability. For example, some manufacturers are satisfied with the fat chamber between the sealing and the slip ring, this increases the durability of the piston and ensures the smoothness of the rotation of the handle.

A shut-off gasket can be simply protected with a brass shell - this will allow it not to creep away under loads.

Types + dimensions of the crankshaft are especially important when choosing. If the type of this device affects only the durability and ease of use of the crane, then the possibility of installing an axle box in the socket depends on its size.

More about the device and installation

As for which types of cranes can be considered optimal, there is no universal answer, it all depends on the operating conditions and requirements for the crane. Therefore, it makes sense to consider the design and principle of operation of the previously listed types of devices.

The device and the principle of operation of the worm crane

The principle of operation is that during rotation of the flywheel the rod moves up and down and the rubber locking gasket fixed at its end reliably closes the channel through which water flows. It is precisely the locking gasket that can be considered the “weakest link”, but it will not be difficult to replace it, so the rubber crane can be considered quite reliable.

A metal rod with a cut left-handed thread (also known as a worm screw) is fixed in the stem. The rod itself is produced in the form of a hollow hexagonal rod with a head for mounting the handle (flywheel). At the end of the worm screw is secured locking rubber gasket.

By the type of head under the flywheel, you can judge who the manufacturer of the crane-axle box. In models of domestic production, it has a tetrahedral shape, while in foreign models it has a round notch. For example, the crane bush 20 slots - guaranteed foreign production.

If we compare it with analogues (ceramic and ball), then we can only note that much lower durability. But such a crane-axle box is much less demanding on the quality of water, so that if there are small mechanical inclusions in water, then this option is suitable.

As for the size, the undercarriage itself is considered a crane box 3 4, 3/8, 1/2 inches. These are the diameters of the landing part are found in the vast majority of homes.

Ceramic crane

The key element of such a device is 2 ceramic plates with an ideally smooth surface. A through hole of the same shape is made in each of them. The bottom plate is fixed, and the top plate is connected to the stem and handle. If a crankcase with a flywheel requires several turns to open, then the maximum that a half-turn analog would require is a rotation of 90 °.

When the valve opens, the holes in the lower and upper disks are aligned; when closed, the upper plate rotates so that the holes overlap.

Note! The only drawback of this design can be considered almost complete unsuitability for repair. If the ceramic disk fails, you will have to buy a new box.

The tightness depends on how tightly the plates fit one another, therefore the half-turn faucet-box should pass only clean water, without sand particles and other solid inclusions. For example, it can be used to supply water after the filter.

On the size and interchangeability of crane cases

Quite often, people want to replace the constantly leaking worm crane with a ceramic one. In this regard, the question arises - will this require replacing the entire crane, or simply inserting a new one in place of the old crane box.

When choosing, you need to focus on the diameter of the mounting hole, that is, the size of that part of the crankshaft that is screwed into the mixer, must exactly match the size of the socket. It is clear that, for example, a faucet box 3 8 inches is not suitable for a hole of a smaller diameter.

Also pay attention to the device parts under the flywheel. In imported devices, the number of notches matters, and domestic ones have this part completely made in the form of a tetrahedron. So, if a domestic crane is replaced with a ceramic analogue, then a flywheel will also need to be replaced.

As for the length, in this parameter most of the crane-boxes are not different from each other, which only contributes to their interchangeability.

The order of work when replacing and repair kranbuksy

When replacing instructions for the work will look like this:

• First you need to stop the water supply and start dismantling the old device. The first step is to remove the cap from the flywheel;
• it will show a bolt under it, unscrewing it, you can remove the valve;
• after that, you can use the key to unscrew the bush from the landing nest;

• after inspecting the thread and removing debris, you can install a new crane box. The works are carried out in the reverse order - the bush itself is screwed in first, then the turn of the decorative cap and the valve begins.

Note! When choosing a new crane box, it is extremely important to choose the right size. It’s not worth making a choice by eye, as a result you can get, for example, a Kranbuksa with a 3/8 inch bore diameter, while you need a 1 2 2 inch axle crane.

Installation of the flywheel is performed only if it corresponds to the number of slots on the nozzle. It is clear that the crane bush 18 splines and a flywheel with a square cross section of the hole are simply incompatible.

As for repairs, in the case of worm gears, it usually consists in replacing the locking gasket. In this case, all that needs to be done is to dismantle the Kranbucks and replace the old gasket with a new one. If you wish, you can even cut it yourself out of a rather thick and thick rubber.

Much worse, if the very bottom of the landing nest is damaged, as a result of this, even if the crane cage is properly laid, it will leak a little. In this case, you will need to replace the entire crane, as a temporary measure you can consider installing a thicker gasket.

As for ceramic Kranbuks, then, most likely, when problems with tightness appear, only its complete replacement will help. But sometimes the cause of a leak lies in the abrasion of the ring, through which it provides a tight clamping of the plates to each other.

In this case, repair is possible with your own hands, for this it is enough to simply cut a new ring of approximately the same thickness (there is no need to precisely observe the dimensions) and place it in place of the old one on the rod. On this the possibility of repairing ceramic crane books is exhausted.

Summarizing

The crankshaft is a simple but no less important mechanism, which is responsible for the normal operation of any tap in the house. The proposed material will provide an idea of ​​the principle of operation of such devices and determine the choice.

The video in this article can be viewed as a quick guide to self-replacing the crane box.