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.
Installation of electric brushes
Remove dirt from the grooves of the brush holder and install the brushes in place, securing them with the latches.
Now is the time to check the performance of the hammer drill. Connect the plug of the hammer drill to the socket, turn on the hammer briefly in the “drilling” mode. Once you are sure the tool is working, turn it off. Set the mode switch to the “impact” position. Do not insert the tool. Check the functionality of the hammer drill in this position. At the same time, you checked the operation of the mode switch.
All that remains is to check the placement of the speed control button, make sure the contact connections are secure, and you can begin installing the cover.
Installing the cover
The cover is secured with three M×4 self-tapping screws of different lengths.
Connect the hammer drill to the 220Β network and check in all modes. The Makita 2450 or 2470 rotary hammer is assembled and working properly!
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.
Instead of an epilogue
An analysis of the market for the lubricants in question has established that this important element of maintenance activities for such an expensive tool as a hammer drill has a relatively low cost. Despite the fact that finding a quality option on today’s market is not a problem. At the same time, the problem of counterfeit products from world-famous brands is acute, therefore, professionals advise purchasing lubricant from trustworthy online stores or trusted retail chains. Separately, it is worth mentioning Russian lubricant manufacturers, who today manage to produce completely universal options that are not inferior in quality to special foreign ones, and which have a significantly lower cost, and they can work with a large number of different devices.
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.
Installing the mode switch lever
The mode switch is designed to move the clutch, pos. 39, to various positions and transmit translational motion to the shaft of the impact mechanism through the rolling bearing, pos. 41, to the cylinder, pos. 32.
Assembly of the mode switch lever for the Makita 2450 rotary hammer
On the axis of the inner housing you need to put the mode switch lever pos. 82 on top, press the pressure spring pos. 88 on top, and press it with a flat washer pos. 87. Install the locking ring pos.86. and fix it.
The retaining ring must be carefully secured. When turning the intermediate shaft, you must carefully check the correct operation and free movement of the cylinder in the housing. This must be done now so that it does not become clear at the end of assembly that the assembly was assembled incorrectly.
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.
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.
