How to lubricate a gearbox in a rock drill: lubrication and stages of work How to lubricate a gearbox in a rock drill, the choice of lubricant, the order of work, the features of lubrication of the drill chuck and the requirements for operation.
Features of maintenance of an electric drill with a punch function
It is much more difficult to maintain an electric drill, which works with a hammer drill function. This hybrid of tools has some disadvantages, unlike a conventional rock drill:
- They do not have special containers for pouring lubricant;
- It is much more difficult to service the drill chuck.
Permanent lubrication is required only for the bit tip. The amount of lubricant is minimal: you just need to clean the drill from dust and apply a small (the size of a match head) amount of grease to the tip. The same requirements apply to the lubrication of a conventional rotary hammer drill. An excess amount of grease on the drill will not harm the tool mechanism, but it will splatter in any case and can damage the repair of the room. But if the grease is brought into the gearbox in an excessive volume, it will simply leak out.
There is little to say about professional rotary hammers. In home use, this tool, as a rule, does not exist. Here, first of all, the price of the instrument plays a role, therefore, it is chosen much less often. But at the same time this tool is considered the simplest and unpretentious in operation. There is usually no problem with the lubrication of this tool, because the design of the mechanism is very simple.
The gearbox also does not have any features that make it difficult to maintain. It’s simple: we unscrew the drain valve, pour the used grease into the container, rinse the reservoir for the punch lubricant, tighten the drain hole and pour new grease to the desired mark. The gearbox of this rock drill is serviced in the same way as described above.
How to lubricate a gearbox in a hammer drill: lubrication and stages of work
Every tool needs timely maintenance, and the hammer drill needs it first. After all, the work of this tool is accompanied by a huge number of reciprocating rotations and movements, and the volume of dust emitted from the working object has a high concentration. Under these operating conditions, careful maintenance of the device and timely replacement of the lubricant in the perforator gearbox are required.
Most users believe that if grease is present, it can be used indefinitely. This opinion usually exists among users due to the poor level of knowledge of the laws of physics, so let’s talk about the mechanism of the lubrication in more detail.
What is needed to lubricate the rotary hammer gearbox?
This lubricant is also demanding for the temperature regime of operation. But this does not mean at all that it is impossible to use lithol. There are factors when, during the use of domestic lubricating fluid, the impact force of the tool only increases and the noise level generated by it decreases. over, this is true for a Chinese-built punch.
Users of the Chinese tool do not rely on warranty service, therefore they act at their own discretion from the very beginning of the operation of the hammer drill (or electric drill). As a hammer drill of any manufacturer has its own fundamental design features, then there is simply no single lubrication instruction. The main thing is that you have at hand:
- Perforator operating instructions;
- Branded lubricant or its domestic analogue.
And then, as you already understood, we act clearly according to the instructions. And remember that anyway the perforator must be cleaned as much as possible from dust after work. Make sure that the lubricant level is not more than the reference mark. Most often, the perforator has a special container for the lubricant, that is, it will not be difficult to do this whole procedure.
It is undesirable to lubricate the gearbox in a hammer drill immediately after work, because hot parts, when cold lubricant gets on them, lose their physical characteristics. The drill shank also needs to be lubricated with lithol or grease. If the hammer drill has an open chuck, then it is advisable to process the oil seal. First, you need to disassemble it and wipe it thoroughly. The applied lubricant will make it possible to extend the service life of the device and will protect against dust getting into the tool. There are several types of lubricants:
- For the gearbox;
- For drill bits;
- For drills.
Why do you need to lubricate the transmission unit?
No matter how strong the metal of the gears is, the friction of the teeth against each other inevitably leads to wear.
In addition to standard loads (when the gears mesh during rotation), the teeth can move in a longitudinal, axial plane. This happens when the hammer drill is designed in a ratchet pattern.
The small gear, together with the movable shaft, moves back and forth relatively large. Accordingly, the lubricant must ensure smooth sliding.
In addition, the gear shafts are supported by bearings. If they are not sealed (with their own lubricated), the same composition is used (all mechanics in one case).
- The adhesion must be so high that an oil film remains between the parts under any load.
- Requires a high rate of water resistance perforators can operate in high humidity conditions. When it cools down, a reduced pressure arises in the gearbox housing, atmospheric air, together with liquid vapors, is sucked inside.
- If water gets in, no emulsion should form.
- Since the gearbox gets very hot during operation, the lubricant will thin out due to temperature. In this case, the basic properties should be restored after cooling. The heated composition should also not lose the main antifriction parameters.
- A high dropping point is required. Otherwise, the rotating gear, under the action of centrifugal forces, will dump grease from the surface of the teeth.
- Fine cement (stone) dust gets into the gearbox housing. The composition of the lubricant is selected so that abrasive particles are bound and removed from the zone of intense friction. When using good oil, the dirt is always on the walls of the gearbox, not inside the gears.
- Since the gear housing is made of aluminum alloys and the gears and bearings are made of alloy steel, the anti-corrosion properties must be equally suitable for both metals.
The same properties (with the exception of dropping point and adhesion rates) should be present in liquid formulations. In a sealed gearbox casing, adhesion of lubricant is not required: during operation, liquid oil constantly washes all parts of the mechanism.
Rotary hammer gear lubricant: differences from conventional lubricants
The hammer drill belongs to the heavily loaded household tools. About the shock reciprocating mechanism is a separate conversation, in our material we will consider an equally important unit: a gearbox.
It works hard in any mode: drilling, perforated drilling, hammering. Maintenance and lubrication for the puncher gearbox is a mandatory procedure, it is performed regularly, using high-quality consumables.
over, this is not just an anti-friction oil, each manufacturer of power tools lays down certain characteristics in the composition, they must correspond to the operating conditions.
Taking proper care of your hammer drill
The hammer drill is a hybrid of two types of equipment used to create holes in different materials. Unlike the classic hammer drill, such a drill has some design flaws, which makes its maintenance more difficult and not very convenient. Such disadvantages, in particular, include:
- Lack of a special container into which the lubricating composition is poured;
- The complexity of servicing the cartridge due to the peculiarities of its structure.
The main care of a drill with the functions of a hammer drill is that after each use, the drill of such equipment (including the tail) must be well cleaned of drilling waste, and before inserting such a tool into the drill, a small amount should be applied to its shank lubricants (you can use ordinary grease). Excessive lubricant on the shank will not harm the tool and equipment used, but may adversely affect the appearance of the surface you are drilling, as excess lubricant will spray out from the rotating chuck.
Impact Drill Gear Lubrication
As a rule, drills with the functions of a perforator are purchased for domestic use, since their price is quite affordable, and they do quite well with their functions when performing simple repairs around the house. Despite the fact that these power tools have the features mentioned above, maintenance of the rotary hammer drill is not time-consuming and does not cause problems even for inexperienced users.
Equipment overheating reasons
Many home craftsmen have a question about how to use a hammer drill so that the housing of its gearbox does not overheat. First of all, you should find out the reason for the excessive heating. One of these reasons may be too much grease in the inner part of the gearbox, which also negatively affects the performance of the device.
The reason for the intensive heating of the perforator gearbox may be that an insufficient amount of lubricant is supplied to its internal parts. This can happen when the hammer drill is used for too long in chiseling mode.
Through this hole in the punch body, grease is periodically added during operation
Another common cause of device overheating is clogged holes that supply cooling air to the hammer drill motor. In such cases, it is necessary to thoroughly clean the rotary hammer from dust and put it in the normal drilling mode for a while. When operating in this gentle mode for about half an hour, the temperature of the gearbox housing should drop.
A versatile and relatively inexpensive lubricant that can be used in most modern rock drill models is diesel oil. Compounds based on graphite are actively and successfully used to lubricate rock drills. Such compositions, in particular, are used to lubricate open-type worm gears.