It is very difficult to manage with one tool in everyday work. Combination key sets can come to the rescue. However, it is necessary to choose such sets carefully, given the maximum of subtleties and nuances.
The main thing to consider when choosing the size of the supplied tools. A combination key is called a key that has 2 heads - a spanner and a cap. This solution allows you to cope with most tasks. You need to understand why a set of keys can be used:
- for domestic purposes;
- for servicing bicycles, cars;
- in construction and repair;
- in work with agricultural machinery;
- in metalwork and assembly manipulations;
- in work with plumbing fixtures.
Depending on this goal, you need to select the composition of the tool, its variety. Any set will definitely have wrenches. The cap and ratchet head of the key can be used equally calmly. However, the ratchet option allows not to remove the key each time from the connection, but to use it after rearrangement. Therefore, in most cases, they choose a combination of open-end and combination spanners or a purely ratchet tool of a mixed type.
Advanced sets (including 22 or even 26 items) contain keys from 6 to 32 mm. The simplest sets, consisting of 6 keys, usually cover the sizes of 0.8-1.9 cm. Even for domestic purposes, extended sets (12 or 15 devices of various sizes) are more justified. But not only the number of items in the set is important. It is also necessary to take into account what they are made of.
Quality tools should be made of chrome vanadium steels. In addition, external protection with zinc or another anti-corrosive substance is also required. Usually the full chemical composition is painted on the product itself. If this is not the case, then it is better to refuse the purchase. You should also ask about the brand of the product. First of all, you need to trust the products of leading companies. It is useful to pay attention to a bag or case. Depending on personal preferences choose:
- soft cover made of fabric.
A very valuable acquisition can be a modern set of ring spanners with a ratchet and hinge. A similar set contains 6 pcs. mixed keys. Their dimensions are 0.8, 1, 1.2, 1.3, 1.4 and 1.7 cm. Each key contains:
The kit is sold to consumers in a plastic container. The part of the annular element located inside the housing contains 72 teeth. The geometry of each of the teeth is chosen so that because of the dog, the part rotates in only one direction. To move it in the opposite way, the key must be turned over . Dismantling is structurally impossible.
Thanks to the hinge, it is possible to change the inclination of the working parts by 180 degrees. The described keys allow you to unscrew the nuts without constant rearrangement. This property is especially important in a limited space. But gradually the dog, and the teeth themselves will wear out. As a result, a key “slip” may appear.
The ratchet in this tool kit has no lubrication inside. Because the ratchet mechanism will wear out excessively. It is also worth considering that there are no keys of 1.1, 1.5 and 1.6 cm. It is reasonable to pay attention to the OMT82S kit, supplied by the Taiwanese company Ombra. This company knows a lot about the production of professional-grade hand tools - there are no problems with their sets.
The described set is designed to work with a wide range of fasteners. The outer shell of all instruments is covered with three layers of specially selected nickel and chromium compounds. Such a mixture is guaranteed to eliminate the slightest corrosion phenomenon.
A common mistake is the opinion that it is impossible to choose a high-quality kit for moderate money.
If you need a set of shortened keys, it makes sense to choose KING TONY 9-1282MR. It includes 12 tools. With the help of such devices it is easy to carry out installation, repair or dismantling work on a wide variety of mechanisms and assemblies. Designers made sure that you can use the tool in a limited space.
Delivery takes place on prepared polymer lodges suitable for the assembly of tool trolleys.
A good choice in some cases may be Licota ACK-B1004. This set includes combination open-end wrenches with a size of 2.4-3.2 cm. Nine of these tools are located in the tool tray. The total weight of the collection is 5.345 kg. It is given a 1 year warranty.
The manufacturer declares that this kit is suitable for mounting and dismounting threads during repair work. The original ACK-BCOVER cover is optional. Thanks to it, you can turn the lodgement into a typical tool kit. It is convenient both on the road and in the absence of tool stands. In addition to general recommendations, it is important to know additional subtleties.
What tools are supplied?
The combination wrench sets invariably present traditional open-horn devices . A pair of horns leaves the handle. The distance between them is equal to the value of nuts and bolts. In most cases, standard open-end wrenches are equipped with horns of various sizes at the ends. The head is located at an angle of 15 degrees with respect to the longitudinal axes of the handles.
On some models, the tilt is 75 degrees. Often combine heads with different angles, but the same size. Use the open-end wrench if you can get to the nut only from the side. In all other cases, a more practical solution is a ring spanner. This is just a ring that duplicates the geometry of nuts and bolts from the inside.
The least effort is to scroll through the fasteners when using a key with a 12-sided internal profile . The hexagonal option is much better suited for "power" work. Sometimes there are designs similar to an open-end wrench, only with rounded edges. There is nothing unexpected here: a slot was simply made in the ring device so that it was possible to get to the nuts not only from the ends.
There is also a socket - including articulated (allowing you to work in different positions) keys. Among the end tool, angular and tubular structures are often distinguished. If it is not indicated what is combined with what, manufacturers imply carob and cap elements. A convenient option is when their heads converge at an angle of 90 degrees. Regardless of which end to grasp, the palm will rest against the opposite edge.
Quite often, a tool with a dynamic profile is used to work with hexagonal fasteners. Typically, these keys have a horn format. The role of the dynamic profile is the elimination of violations of the nut faces. As a result, the operation of both tools and fasteners is maximally extended.
Do not use force when using any combination keys.
A more detailed overview of the combination keys can be found in the video below.