Manual drills: choice, application, pros and cons

Despite the steadily growing popularity of the electrified tool, the use of manual drills continues to be very relevant. Their choice is relatively small, however, they all can boast a lot of obvious advantages with a minimal number of minuses. The justice of this thesis is confirmed by both domestic and foreign craftsmen who continue to use these tools to successfully solve various household tasks.

Manual drills: choice, application, pros and cons

Manual drills: choice, application, pros and cons

What it is?

Manual drill, also referred to as mechanical, is used by a person for two millennia. At first, it was extremely primitive, representing a bronze peak with a curved top and a pointed tip. In the future, its design has become more perfect, which led to the appearance of a coofer – a tool capable of boasting the presence of a cartridge to reliably fix the drills.

As for the popular models of manual drills currently used, they provide for the presence of gear reducer, Already mentioned earlier cartridge, handles, fixing handles and stubborn legs. Using such tools, you can drill holes in a variety of materials: from pliable wood to concrete and metals that differ in high strength.

Separate attention deserves the effectiveness of modern hand drills in comparison with the coofer: with the same handle rotation frequency they have three times.

Manual drills: choice, application, pros and cons

In addition to drilling, the tool in question can be used to solve the following tasks:

  • drawing markup;
  • an increase in the diameter of existing holes;
  • Creating nests for hidden heads of screws, bolts and rivets;
  • Perform finishing.

In addition, individual craftsmen use a manual drill as a replacement of a screwdriver and a mixer – subject to the fixing of a suitable device in its cartridge.

Manual drills: choice, application, pros and cons

pros

There is enough advantages, fully justifying the use of described tools.

  • Easy design. Due to the absence of a large number of components, mechanical drills are easily repaired and do not need to be particularly thorough care. This allows you to significantly reduce the amount of time and means necessary to ensure the operation of the tool used. The solution of this problem is not different: it involves the timely application of lubricants and the replacement of parts that exhausted their working resource.
  • Reliability and strength. Experience shows that breaking the hand drill is very difficult even subject to regular and very intensive operation. This is explained by the high quality of the materials used in the manufacture of such tools (especially those that were issued during the USSR). Many mechanical drills produced several decades ago, successfully serve so far, repeatedly justifying their initial cost.

Manual drills: choice, application, pros and cons

  • Autonomy. The tools described do not need electric power, and therefore they can be applied anywhere. This advantage of manual drills is especially relevant for those who have to work away from the usual benefits of civilization.
  • Democratic price. To date, a new manual drill can be purchased for 600-1000 rubles, while the existing mechanical “helper” will cost even cheaper (approximately twice). In addition to the technical condition, its dimensions are affected by the value of the instrument, the equipment, the case material and the reputation of the manufacturer.

Most often, the master prefers drills produced in a two-handed version using them to create small holes and grooves. Accurate execution of such works implies accurate control of drilling depth and extremely careful rotation for which the described tool is sufficient to the greatest extent.

Manual drills: choice, application, pros and cons

Minuses

One of the main shortcomings of manual drills is their massiveness due to the specifics of the parts used. Provided that the latter are made of cast iron, the mass of the tool can reach 3 kg, creating certain difficulties during operation and transportation. Another disadvantage of such drills is large dimensions: as a rule, the masters do not consider it critical, however, some craftsmen refuse to the manual tool for this reason.

Separately, it is worth mentioning an application of physical efforts provided for work with mechanical drills.

This circumstance leads to the fact that many performers prefer the power tool. In addition, manual drills are significantly inferior in terms of performance, and therefore practically not used when performing large volumes of work.

Manual drills: choice, application, pros and cons

Manual drills: choice, application, pros and cons

Manual drills: choice, application, pros and cons

Varieties

Depending on the characteristics of its design, the described tools are single and two-speed. The first are applied relatively rarely, which is explained by their low efficiency, while the second are used much more often, since they have a more advanced design and are able to solve a variety of tasks.

Manual drills: choice, application, pros and cons

Single-speed

A classic hand drill relating to this species involves the presence of a pair of gears whose rotation leads a cartridge in motion. Most often, such tools are open – not providing for the use of a protective case.

The main advantage of this design is the maximum convenience of applying lubricants.

As for the location of the gears, the big one is associated with the handle, and the smaller – with the patron. Another feature of such drills is the presence of a handle, thanks to which you can safely fix the tool while working.

Manual drills: choice, application, pros and cons

Manual drills: choice, application, pros and cons

Two-speed

The considered type of hand drill implies the presence of a multiplier – a mechanical device, which is also called an accelerator.

It consists of gears located on different axes in one case, thanks to which the rotation frequency changes occurs.

In order to change the speed of such a drill, it is enough to install a handle on the other side. This action leads to an increase or decrease in the gear ratio, which naturally affects the performance of the tool. There are also such models of drills in which a longitudinal shift of the axis of rotation of the handle is provided for changing the speed, and the permutation not mentioned above.

Also, mechanical drills differ depending on the type of cartridge used. Its design can provide for the presence of three or four cams – clamping elements that ensure reliable fixation of the rotating tool.

Manual drills: choice, application, pros and cons

Manual drills: choice, application, pros and cons

Manual drills: choice, application, pros and cons

How to work drill?

To successfully solve problems with the application of the described tool Enough to adhere to useful recommendations.

  • If the Contractor needs a standard placement of holes, he should pay attention to the location of the drill. During operation, it should be at a right angle to the surface, without deviations in any side. As for inclined holes, it should be placed drill under the right angle.
  • Completing the drilling, you need to reduce not only the speed of rotation, but also push – in order to avoid damage to the cutting tool. In addition, the implementation of this condition reduces the likelihood of a loss of equilibrium by the Master.
  • To use a manual drill as a screwdriver, it is enough to fix in its cartridge a bit with a suitable tip. There is also attached and a mixer – in situations where the tool in question performs the function of the mixer.

Upon completion of the work, a manual drill remains thoroughly clean from dust, chips or sawdust.

Manual drills: choice, application, pros and cons

Safety and choice rules

One of the key conditions, to observe which is worth each owner of the hand drill, is the safe operation of this tool. The latter provides for the accounting of uncomplicated rules.

  • Detail drilling can only be performed after it is securely fixed. Ignoring this condition can damage the processed object or injury by the artist.
  • It is impossible to touch the drills and nozzles – both during the operation of the drill and after the expiration of a short period of time since its end. This is due to the fact that the processing of solid materials by a quick-growing cutting tool involves strong friction, the natural consequence of which is heating.
  • After the drill is securely recorded, the performer should remove the key from the cartridge.
  • To the cutting tool do not fool, it needs to be periodically cooling, making breaks in the work or inflicting a special suspension. Thus, you can not only extend the operational resource of the drill, but also make holes more neat.

Manual drills: choice, application, pros and cons

Manual drills: choice, application, pros and cons

In addition, in order to avoid damage to the eye with chips and other minor drilling waste, you need to use safety glasses.

In order for the purchased hand drill did not disappoint its owner, it must comply with the following conditions:

  • The high quality of the manufacture of all visible structural elements (in the presence of burrs, sharp edges and other defects from the acquisition of the tool it is desirable to refuse);
  • convenient shape of the handle (the presence of a protective coating is also welcomed);
  • smooth rotation of the cartridge;
  • No extraneous noise during work.

Manual drills: choice, application, pros and cons

Special attention should be paid to the material of the handle, which can act as a tree or plastic.

Most often, experts prefer the first second, explaining this best wear resistance of this material.

As for the species of manual drill, the optimal solution is a two-speed tool with a large number of functions. This is especially true to perform complex work – tasks, to solve which without changing the rotational speed is almost unreal.

Manual drills: choice, application, pros and cons

Manual drills: choice, application, pros and cons

How to make it yourself?

Finally, it remains to tell about the manufacture of the simplest hand drill on their own. The described method involves the use of an old umbrella, a dowel and drills as a component of the tool created, as well as the simplest inventory – a hammer and hacksaws for metal. Practice shows that this task can be solved in a few minutes, adhering to the algorithm below:

  • take an umbrella and sprink from its rod fragment of the desired length (along with the handle);
  • bend the workpiece in two places at an angle as close as possible to straight;
  • Pick up a dowel of a suitable diameter and drive it into the tube on the maximum possible depth, after which it is securely fixed in it.

Manual drills: choice, application, pros and cons

Manual drills: choice, application, pros and cons

Manual drills: choice, application, pros and cons

Manual drills: choice, application, pros and cons

Manual drills: choice, application, pros and cons

If the master is needed a thinner cutting tool, he will need another dowel to drive into the already established. Upon completion of this action, it remains to take the drill of a smaller diameter and consolidate it in the method described above.

Summing up, it can be stated that the manual drills deservedly use their popularity. Use them makes sense to everyone who appreciates reliable and unpretentious tools capable of providing high quality work performed.

Manual drills: choice, application, pros and cons

Overview of the hand drill and the principle of her work you can see in the following video.

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