Even inexpensive rotary hammers, when used correctly, require timely maintenance. In more difficult conditions, a variety of grinders, including grinders, and wall chasers work. High speeds of rotation and movement of mechanism elements, significant loads, to which fine dust is added, negatively affect the quality of work. The tool requires periodic disassembly and cleaning, during which the hammer drill is lubricated.
Rotary hammer working equipment
The instructions for the mechanism always contain an urgent requirement to lubricate the shank of the replacement tool. The drill absorbs high dynamic loads at the level of thousands of blows per minute.
During continuous operation, the operator should regularly coat the drill shank with lubricant - without this, the attachment will overheat and break. Caring for a rotary hammer is a painstaking task.
Boer
Correct application is carried out in the grooves into which the cartridge wedges fit. It is important to clean them of debris and sand, and then apply a small amount of lubricant to them. When removing a drill or bit, you should always renew the layer of lubricant - a fraction of a gram is enough.
Hammer chuck
Initially, this unit does not have its own protective coating. It is required to add 1-2 grams of lubricant before starting work.
Cartridge
Place of processing – seating surfaces for replaceable tools. This is where colossal friction and shock loads arise that can damage the cartridge. In addition to active protection, this also achieves passive protection: a layer of substance will cover the internal device from the penetration of dust and small particles.
Hammer gearbox
This mechanism is key in an electric tool (after the motor, the rotation of which it transmits to the working attachment). Operating conditions of the gearbox: constantly changing rotation speed and torque, strong friction and increased heating from it. To this should be added penetrating dust and small contaminants - the gearbox is under constant tension.
Hammer gearbox
Lubrication of the rotary hammer gearbox is carried out by applying a substance to the internal surfaces - especially after long-term operation. Bearings and shafts are protected in the same way. It is important to lubricate the rotary hammer gearbox during long-term operation.
Design Features
Such power tools are barrel and straight, mechanical and pneumatic, and depending on the size - light, medium and heavy.
Main components:
- core;
- Boer;
- striker;
- piston;
- cylinder;
- electromagnetic coil.
There are differences in details depending on the type of device. And that's not all the details on the list. So how does a hammer drill, a useful device in construction, work? The units, in addition to the above parts, are equipped with:
| Element | Purpose |
| Cartridge | Used to secure the nozzle. There are tools with SDS Plus (drilling, drilling, impact) or SDS max (drilling and impact) chucks. |
| Chuck replacement system | High-speed replacement of one type of SDS chuck with another (cam). |
| Gearbox | This is a single body with many gears. The main function is to change the speed of rotation of the shafts. |
| Vibration protection | It can be active (has a counterweight with a spring) or passive (rubber pads and rubberized handle) type. The system reduces vibration levels. |
| Safety clutch | It comes into play when you need to stop the movement of the chuck if the attachment jams when drilling/drilling a surface. |
| Electronic immobilizer | Stops the device in emergency situations, for example, if there is an overvoltage in the network. |
| Engine | There are transverse (vertical arrangement) and longitudinal (horizontal arrangement). |
In addition, such tools have a variety of indicators and speed controllers. Having understood the nuances of the construction of this construction tool, it’s time to move on to lubricating its individual elements.
Lubricant for drills
High-quality models are sold with the volume of lubricant produced for processing drills. Its intended application is the mating surfaces of the shank. Moreover, the provided viscosity characteristics depend on the brand of the substance.
You should use exactly the brand recommended by the manufacturer. The reason is that the chemical composition is selected to match the construction materials and ensure their integrity during prolonged “hot” work.
It is optimal to purchase consumables of the same brands as the tool.
Gearbox lubricant
Lubricating the gearbox of a newly purchased hammer drill is not required. The factory has already placed the calculated amount of oil inside, so its presence there is often missed. However, during operation it decomposes, becomes dirty and ceases to fulfill its role.
After some time, it is recommended to replace the oil with one that is designed for harsh operating conditions and high heat. Friction occurs inside the gearbox during rotation, characterized by frequent and sharp squeezing of fluid from the friction pairs. Therefore, specialized oils are used that can:
- protect metals from oxidation;
- capture and remove pollution;
- stick to surfaces to protect them;
- be water-repellent;
- do not be afraid of strong heat,
- as well as self-healing.
Causes of equipment overheating
Many home craftsmen have a question about how to use a hammer drill so that its gear housing does not overheat. First of all, you should find out the reason for the excessive heating. One of these reasons may be too much lubricant in the internal part of the gearbox, which also negatively affects the performance of the device.
The reason for the intense heating of the rotary hammer gearbox may also be that an insufficient amount of lubricant is supplied to its internal parts. This can happen in cases where the hammer drill is used for too long in the chiselling mode.
Through this hole in the hammer drill body, lubricant is periodically added during operation.
Another common reason for the device to overheat is that the holes through which cooling air flows to the hammer drill motor are clogged. In such cases, it is necessary to thoroughly clean the rotary hammer from dust and switch it to normal drilling mode for a while. When operating in this gentle mode for about half an hour, the temperature of the gearbox housing should decrease.
With proper care of the technical condition of the rotary hammer and compliance with all recommendations for its use, the gear housing should not overheat under any operating conditions.
Top 4 lubricants for rotary hammer drills
Lubricant for hammer drills is individually selected for the brand of the tool itself, but there are several universal formulations. They stand out from the crowd, but the application remains up to the decision of the hammer drill operator.
The following are good for construction and domestic conditions, therefore they are used quite widely.
Hammer lubricant: makita 196804 7
Origin: Japan.
Purpose: processing of the shank and the inside of the chuck.
Release form: soft tube, 95 g.
Pros:
- lack of decomposition and transformation into wax;
- operational reliability and high level of surface protection;
- Convenience of storage containers.
Minuses:
- decent price;
- the chemical composition is a secret of the manufacturer.
Impression: smooth operation even after long hours of use.
Hammer lubricant: arsenal ar 401 100 g patriot
Origin: USA.
Purpose: processing of any replaceable drills used when rotating up to 4 thousand revolutions per minute.
Release form: flexible tube, 100 g.
Pros:
- retention of dusty contaminants – at a height;
- protection power – just right for intensive work with minimal consumption of tube contents;
- sufficient initial fluidity for fast and reliable processing of complex configurations;
- practical container that allows you to get a minimum amount of the composition.
Minuses:
- heated liquid has increased fluidity, which slightly reduces performance characteristics;
- the tube sometimes produces strong splashes, the price of which is lost composition and contaminated surfaces;
- There is no usual relief - it is problematic to open without removing gloves or with wet hands.
Impression: a decent lubricant at a not too high price, which lasts for a long time. How to use is intuitive.
Lubricant for rotary hammer: bison zsb 125
Origin: Russian Federation.
Purpose: replaceable tools with difficult working conditions (bit, chisel, drill), for cartridges of any configuration.
Release form: soft tube, 125 g.
Pros:
- enhanced chemical composition to withstand extreme loads;
- resistance to moisture and the formation of aqueous emulsion;
- reliable corrosion protection and high tribological properties;
- relatively low price;
- significant operating temperature range: from -50 to +130 degrees.
Minuses:
- relatively rapid acquisition of a liquid state;
- possible ejection from the rotating cartridge;
- does not rub off well from absorbent materials.
Impression: a semi-synthetic substance, packaged in a convenient tube, does its job efficiently, but you need to get used to its slightly lower viscosity.
Hammer lubricant: elitech 2006 000100
Origin: Russian Federation.
Purpose: to counteract friction and corrosion of replaceable tools and chucks.
Release form: tube, 60 g.
Pros:
- powerful operating temperature range: from -55 to +140 degrees;
- there is no scattering of individual drops;
- versatility of use - suitable for any type of tool and any working conditions.
Minuses:
- Possible strong darkening when working too hard and drying out when stored for too long;
- relatively small volume.
Impression: reliable material at an affordable price that will not turn into liquid oil.
How to lubricate correctly
To correctly apply the lubricant to the rotating parts of the hammer drill, you need to study the instructions. It indicates what needs to be done and in what order. It also indicates what consistency the lubricant should be.
The following steps are required:
- prepare lubricant for the hammer drill;
- remove the rotating elements from the housing and clean them from dust and dirt;
- let the parts dry;
- apply the mixture to the rotating elements in sufficient quantity;
- put everything back together in reverse order.
Important . Excessive lubricant clogs the hammer drill, reducing its service life. Therefore, there is no need to apply more substance than required.
The instructions describe in detail how to perform all the steps yourself. It is worth considering in more detail how to properly lubricate the main elements of a hammer drill.
Before disassembly, you need to prepare the necessary tools. If you have no experience in assembling/disassembling rotary hammers, then you should watch several videos on the Internet. This will reduce the risk of errors and allow you to assemble everything correctly.
Gearbox
It is located inside the product. Not everyone knows that it also needs to be lubricated. If the level of friction is high, the hammer drill overheats. Here's how to process a gearbox yourself:
- Cleaning the rotary hammer from dust. To do this, use a damp cloth or rag. The entire housing must be thoroughly wiped to ensure that no solid particles get into the parts. Some components burn out when debris gets into them.
- Disassembling the case. It is recommended to remember which elements are located where. Do not process the gearbox immediately after using the hammer drill. Hot elements often break after contact with cold material.
- Removing the gearbox from the housing to wash it with gasoline or spindle oil. It is also recommended to rinse the inside of the case as much as possible. Kerosene, gasoline or other substances are used for this.
- After drying the part, apply lubricant evenly to its entire surface. It is important to note that during disassembly, not all components of the tool were lubricated. This means that they do not need to be processed.
- After completing all the steps, you need to assemble the hammer drill.
Cartridge
This element becomes clogged during operation. If dust and debris are not removed, the cartridge will jam. The manufacturer indicates what substance is required to treat the hammer drill cartridge. Here's how to take preventative care:
- First, the cartridge is separated from the tool and disassembled into individual components.
- Each part is washed in kerosene or gasoline to remove dust and other solids.
- Lubricate all components of the cartridges with the material recommended by the manufacturer.
- Reassemble everything and install it back.
Important . The cartridge must be lubricated simultaneously with the gearbox. This will extend the life of the tool.
For the drill, as a rule, the same material is used as for the shank. To reduce friction and improve the performance of the hammer drill, oil/cream is applied each time before work. If the drill is changed, it needs to be processed again.
- The required drill is selected. It must be clean, without traces of dirt and dust.
- There are special grooves on its base. You need to introduce a lubricant into them.
- Place the drill in the chuck and start working.
The grooves are well processed. Usually a creamy mixture is used.
Top 3 lubricants for rotary hammer gearboxes
The most loaded parts of the gearbox are the gear teeth and bearings. For them, substances are manufactured with capabilities designed to resist water and high temperatures.
Hammer gearbox
Lubrication of the rotary hammer gearbox can be done well with one of the three products listed above. How to lubricate the gearbox is up to the operator to decide.
Hammer lubricant: makita p 08361
Origin: Russian Federation.
Purpose: high-power rotary hammers and jackhammers (with SDS-Max chuck).
Release form: tube, 30 g.
Pros:
- easy to use with viscous consistency;
- coloring indicates untreated areas;
- minimum storage space.
Minuses:
- the manufacturer hides the chemical composition, so it is difficult to replace with an analogue;
- will leak from models without an oil seal;
- small volume, which is enough for only a couple of uses;
Impression: reliable composition for models with a shock mechanism and high vibration.
Lubricant for rotary hammer: ultra 50 g vmpavto et 110005
Origin: Russian Federation.
Purpose: removal of contaminants and removal of heat in gearboxes with gear and hypoid transmissions.
Release form: transparent rectangular package, 50 g.
Pros:
- high wetting of metals;
- self-distribution in work;
- the consistency is equally viscous and liquid;
- low cost.
Minuses:
- ability to exit from any gap if the loading quantity is exceeded;
- practicality suffers from a strong odor;
- packaging may seem inconvenient;
- the amount of content is enough for a couple of refills.
Impression: the lubricant has high fluidity, which increases its functionality - penetration into far corners and between all teeth is carried out independently.
Hammer lubricant: ultra 200 g vmpavto
Origin: Russian Federation.
Purpose: transmissions with gear and planetary gears used at high speeds.
Release form: tube, 200 gr.
Pros:
- easy and quick distribution over the surface;
- additives to improve tribological properties;
- heat removal at high speeds;
- A decent volume is sufficient for long-term use.
Minuses:
- not the best results for rotary hammers with low operating speeds (less than 1500 rpm);
- relatively high price.
Impression: the dark-colored composition is convenient for the hammer drill gearbox and has high performance properties.
How else to lubricate the rotary hammer gearbox
How to lubricate in the absence of special equipment? Contrary to recommendations regarding specially developed mixtures, the use of solid oil or lithol is allowed for a short period of time. These proven materials are cheap and widely available, unlike hammer drill lubricant.
They allow for short-term protection of nodes in the absence of other means. The disadvantages of this solution are some braking of the mechanisms and low heat removal. What kind of lubricant is available in the field is a question, so using them is the best solution if you are empty-handed.
