How to lubricate hammer drills: types of lubricant and rules

How can you cool a drill?

The ideal way to cool

In most drilling operations using carbide
drills,
coolant is supplied through the machine spindle, respectively, through the spindle clamping equipment and the internal channels of the carbide
drill
.

Interesting materials:

How many spoons of flour are in 180 grams? How many spoons of sugar are in 1 kg? How many spoons of powdered sugar are in 100 grams? How many spoons are in 250 g of sugar? How many spoons of tea leaves in a thermos? How much salt should I put on 1 kg of meat? How many McDonald's are there in Rostov-on-Don? What is the maximum score in OGE? How much can you lose maximum in a month? What is the maximum number of rounds in CS GO?

Why are lubricants needed when drilling metals?

Strong heating during drilling is a serious problem. At the point of contact between the tool and the workpiece, the temperature reaches hundreds of degrees Celsius.

When overheated, materials begin to burn or melt. This applies to both drills and processed metals.

1. The steel from which the tool is made loses its hardness when heated strongly. As a result, the cutting edges wear out quickly. This leads to a significant increase in friction force. Because of this, processing efficiency decreases and drills quickly fail. It is necessary to use cutting fluid (coolant) even when using carbide drills.
2. Strong heating, if the part begins to melt, will affect the quality and geometry of the hole. This is unacceptable in many cases.
3. Another side effect of drilling metal without lubrication is rapid wear of the drilling machine motors. Constant overload leads to it. The result is expensive repairs.

It is these problems that cutting fluids solve.

Note! For cooling, in no case should you use unsuitable means at hand (water, solvents, anti-freeze, alcohol, glass washing liquid, etc.). For example, the use of water instead of the recommended coolants leads to corrosive destruction of workpieces, as well as the working beds of machine tools.

How to make your own oil-based coolant

To prepare an oil-based emulsion with your own hands, just thoroughly mix three components - oil, water and surfactant (surfactant).
Metalworking forums also offer more complex recipes for making homemade coolant for lathes. For example:

1. mix one faceted glass of flavored liquid soap, unrefined sunflower oil, kerosene and soda ash + half a stack of laundry bleach + a quarter stack of Fairy, add warm water to a volume of 10 liters and heat to 90 ° with continuous stirring. Dilute the resulting concentrate with water in a ratio of 1:3.
2. 65 liters of water + 7 liters of diesel fuel + 1 piece of grated 60% laundry soap + 1 pack of Pemos Automatic washing powder + 200g of Feri dishwashing liquid (Fairy) + 2 tablespoons of soda ash. After pouring into the coolant tank, run the pump for 10 minutes - and the homemade emulsion is ready.

Industrial oil is often found in recipes for homemade emulsions. It can be replaced with a motor one.

Economic feasibility of using cutting fluids

The use of recommended cutting fluids is completely justified from an economic point of view. This is proven by the results of various tests.

An excellent example is data from the Karnasch plant (Germany). A test was carried out on it in which two core drills were used to make holes with a diameter of 25 mm in steel 10 mm thick. When drilling with the first drill, a 7% emulsion solution was used, and when processing the material with the second tool, water was used. In the first case, it was possible to drill 1,500 holes, and in the second, 835. This is 45% less.

On average, if we take into account the cost of coolant, the economic costs of metalworking are reduced by 15%. At the same time, the service life of the machine is extended. This fact is also worth taking into account.

The best lubricant for a hammer drill gearbox

To reduce wear on gears and bearings, manufacturers produce lubricants with a different composition, designed for high temperatures, water repellence and drip resistance. Next, we’ll look at the best lubricants that have already been tested by users and received positive reviews.

Makita P-08361

Development from , designed for jackhammers and powerful rotary hammers with the SDS-Max chuck system. The grease comes in a traditional red and white tube containing 30 g of substance. The company keeps the composition of the lubricant secret, so finding an analogue at a more affordable price is difficult.

Pros of Makita P-08361

1. Easy to apply to gears.
2. The black color helps you clearly see which areas have already been treated.
3. The liquid consistency facilitates flow even into hard-to-reach areas.
4. The compact tube does not take up much space in your suitcase.

Cons Makita P-08361

1. The 30 ml capacity is not enough for a long time - one or two maintenance.
2. It is inconvenient to unscrew the lid - it slips in your hands.
3. Not suitable for hammer drills that do not have an oil seal between the gearbox and the rotor (it will leak).
4. Do not apply to gearboxes of high-speed light hammer drills.

Conclusion. This is an excellent lubricant for rotary hammer gearboxes that use a pneumatic impact mechanism with a piston system. The substance withstands high vibration and always remains on the gears.

“Ultra” (50 g) VMPAUTO ET.110005

TOP 3 continues to be lubricant from a domestic manufacturer. The product is produced in a bag, from where it has to be squeezed onto the gears. The weight of the container is 50 g. The lubricant is suitable for gear reducers and hypoid gears. Designed to remove debris and prevent overheating. There is a slot at the top of the package for hanging.

Watch the product video

Pros “Ultra” (50 g) VMPAUTO ET.110005

1. Good adhesion to metal gears.
2. The optimal consistency for application is moderately liquid and quite viscous.
3. Attractive price.
4. The mechanism quickly distributes the substance between the teeth.
5. The dark color helps to visually control the area covered by the material.

Cons of “Ultra” (50 g) VMPAVTO ET.110005

1. It has a pungent, unpleasant odor.
2. If you put more than normal, it will squeeze out from all the cracks.
3. Inconvenient packaging for storage and application.
4. Enough to fill two gearboxes.

Conclusion. This lubricant is suitable not only for two gears, but even for a whole series of planetary gears. Due to its increased fluidity, the product penetrates deeply between the discs and completely envelops all rubbing parts.

Popular models of core drilling machines

At MOSSklad you can buy magnetic drilling machines from the best manufacturers in a wide price range for drilling holes with a max. diameter from 25 to 200 mm.

Rotation speed: 650 rpm Max. d-drilling: 16 mm In stock and in the demo room

RUB 37,400

Rotation speed: 400 (775 no load) rpm Max. d-drilling: 6-14 mm Coming soon

RUB 50,688

Rotation speed: 250/450 rpm Max. d-drilling: 16 mm In stock and in the demo room

RUB 77,957

Rotation speed: 60-140 and 200-470 rpm Max. d-drilling: 32 mm In stock and in the demo room

How can I replace coolant?

It is impossible to prepare exact analogues of modern emulsions for machine tools with your own hands, but it is quite possible to replace a number of them using this table:

Here, on a five-point scale, dry cutting is 1 point. If the use of a coolant substitute provides an improvement/deterioration compared to dry machining, points are added/subtracted.

If you decide to replace the emulsion in the machine with a homemade equivalent, thoroughly rinse and disinfect the tank and feed system. This is necessary to avoid problems due to the compatibility of the compositions, to destroy bacteria, fungi and mold. For this procedure, you can use Oilcool XR system cleaners.

Some “home Kulibins” consider brake fluid and anti-freeze to be analogues of coolant. These fluids do have excellent cooling and lubricating properties, but contain substances (methanol, ethylene glycol, propylene glycol) that can cause severe poisoning, disability and even death. Therefore, they cannot replace the emulsion for the machine.

Video description

Lubricating the hammer drill chuck.
When choosing a substance, you need to take into account that, for example, what you use to lubricate a hammer drill is not always suitable for processing a gearbox. For each of the nodes, it is necessary to use the substance recommended specifically for this node.

Applying lubricant to the drill Source srbu.ru

In modern instruments, plastic parts may be used in some cases. Here you cannot use the same means as for metal parts. For this, silicone grease is used.

For tail nozzles, thicker mixtures are used. This is caused by the significant loads that this part of the tool experiences. Usually the packaging indicates whether it is suitable for processing drills. The technician must carefully choose which lubricant to use for the hammer drill.

Detailed diagram of the hammer drill Source burforum.ru

The most popular products for the purposes under consideration are the products of the following manufacturers:

• Makita lubricants are designed to care for drill bits.
• Turmgrease mixtures have universal use.
• Bosch products are suitable for both gearboxes and tail parts of attachments.
• Lubcon Thermoplex lubricants are designed for gearboxes.
• Nanotek products are well suited for lubricating the drill tail.
• The mixture from Kress is used for drills.

The use of branded products must be in accordance with the instructions supplied with them.

The drill shank experiences significant loads during operation. Source zuzako.com

Technology and methodology for drilling stainless steel

The first and most important thing to remember: drill stainless steel only using cooling lubricant and special drills. As for the thickness of the material being processed, the technology provides the following:

1. Stainless steel, the thickness of which is within 1–2 millimeters, can be drilled with ordinary metal drills. In this case, the sharpening angle of the tool should correspond to 120 degrees, and the revolutions of the electric drill should not exceed 100 per minute.
2. It is better to drill a millimeter-thick or thinner layer of stainless steel using step-type equipment. It provides a smooth channel with no burrs or burrs on the edge.
3. It is best to produce holes in stainless steel with a thickness of more than 6 mm using specialized cutters in two stages. First, you need to drill the metal with thin equipment with a diameter of 2–3 mm, and then bring it to the desired diameter with a finishing drill.

If stainless steel shavings begin to acquire dark shades and become small, this indicates that the cutting edges are dull and overheating. It is impossible to work in this mode.

Choice

The better the composition of the lubricant, the more effective it will be. Experts say that lubricants containing graphite are more preferable for hammer drills. They often surpass branded mixtures in their beneficial effect and are also often more affordable. The use of a lubricant reduces wear, but may cause minor drag and additional heat during tool operation.

The video discusses in detail how to lubricate a hammer drill chuck:

Which is better: prepare coolant yourself or buy factory-made

Hobby metalworkers persistently develop their own recipes for making emulsions for machine tools for various reasons: someone wants to create an analogue of imported coolant, which has disappeared from sale, someone simply likes to achieve the desired results themselves.
Do-it-yourself coolants are cheaper than factory ones, but they are inferior in terms of performance characteristics and service life, and some homemade compositions are also very dangerous to health.

Today, Russian enterprises produce complete analogues of coolant from world brands and publish interchangeability tables, with the help of which you can choose a high-quality and inexpensive emulsion for a lathe. Therefore, you should not conduct risky home experiments with making formulations according to recipes from the Internet.

The best lubricant for rotary hammer drills

Having considered the purpose and requirements for lubricants for a hammer drill, let's figure out which lubricant for a hammer drill is better in terms of characteristics and reviews. To do this, we have compiled a rating of popular examples that have already been tested by time and operation in domestic and construction conditions.

Makita 196804-7

Lubricant from a Japanese brand, designed only for application to the shank and inside the chuck. Available in a white and red tube with the brand logo and index. The container holds 95 g, which lasts from a month to a year, depending on the frequency of use of the hammer drill. The soft walls of the tube make it easier to squeeze out the composition and apply it to the equipment.

Pros of Makita 196804-7

1. Does not delaminate even during long-term storage.
2. When heated, it does not turn into wax.
3. Produced directly in Japan.
4. Convenient packaging for squeezing.
5. The tube easily fits into a suitcase for transportation.
6. There is a loop for hanging in the garage or other work area.

Cons of Makita 196804-7

1. The cost is relatively high.
2. The white bottle gets dirty quickly.
3. The packaging does not indicate the composition - it is difficult to find a similar one, but cheaper.

Conclusion. This is one of the highest quality lubricants for hammer drills used in intensive mode. Reviews from craftsmen show that with it the equipment does not jam even when chiseling walls for 6 hours every day. In this case, only one chisel is used at all times. If you want to protect the cartridge and equipment as much as possible, then purchase products for drills from Makita.

Arsenal AR-401 (100 g) PATRIOT

In second place in the ranking is a product from the American brand “Patriot”. The product stands out at an attractive price. Suitable for lubrication of all drills with rotation speeds of 1000-4000 rpm. The tube capacity is 100 g.

Pros of Arsenal AR-401 (100 g) PATRIOT

1. Relatively low cost.
2. You need to squeeze out just a little bit.
3. Convenient packaging for use.
4. Retains dust well.
5. The case is not easily soiled.
6. There is a hole for hanging.

Cons Arsenal AR-401 (100 g) PATRIOT

1. Sometimes it splashes from the cartridge onto the wall.
2. When heated, it becomes highly fluid.
3. The tube cap has no relief and is difficult to unscrew while wearing work gloves.

Conclusion. This product is notable for its economical consumption. Users in reviews share that it is enough to squeeze 0.5 g onto the drill shank, so that this is enough to lubricate the equipment during intensive use. True, such accelerated distribution over the surface is due to increased fluidity, so it needs to be added less, but more often.

Bison ZSB-125

Third place in the ranking goes to the domestic lubricant from Zubr. Its composition has a semi-synthetic base. The manufacturer added special additives to increase the positive properties of the substance under extreme loads. The product is suitable for drills, chisels, and crowns. It can be chambered in “light” SDS+ cartridges and “heavier” SDS-Max cartridges. The lubricant is resistant to water and does not form an emulsion. The product reliably protects the metal components of the hammer drill from abrasion and corrosion.

Pros of Zubr ZSB-125

1. Relatively low cost.
2. Tube capacity - 125 g.
3. Large inscription “For drills”, so as not to be confused when servicing the gearbox.
4. Loop for hanging grease on a hook in the garage.
5. For SDS+ drills, a thin layer is sufficient.
6. Nano-technologies were involved in the development of the composition.

Cons Zubr ZSB-125

1. It is difficult to unscrew the cap with sweaty hands.
2. It quickly becomes liquid.
3. It flies out of the cartridge onto the wall.
4. Difficult to wipe off wallpaper.

Conclusion. This lubricant has a wide temperature range. It does not thicken much at negative temperatures down to -50 degrees, and remains moderately fluid when it reaches +130 degrees. If you work as a hammer drill in the cold or in an open space in the summer, then this product will be the best.

Elitech 2006.000100

This category is completed by another domestic lubricant on a semi-synthetic basis. It is available in a soft tube with a capacity of 60 g. The substance is designed to reduce tool friction and protect against corrosion. The temperature range allows the product to be used from -55 to +140 degrees.

Pros of Elitech 2006.000100

1. There is no strong splashing when overheating.
2. Affordable price.
3. Doesn't turn into oil.
4. The tube has a hole for hanging.
5. Suitable for all types of shanks and types of working equipment (chisel, chisel, crown, drill).

Cons of Elitech 2006.000100

1. It gets very dark when drilling for a long time.
2. If stored in a warehouse or garage for a long time, it may dry out or delaminate.
3. The tube capacity is smaller than other brands.

Conclusion. This lubricant best prevents metal corrosion. With it, your drills and chuck elements will remain intact and without traces of rust. If you prefer to use expensive drills and bits from domestic manufacturers, then this lubricant is perfect.

Which drill is better to use

List of drills for stainless steel that are definitely suitable for drilling metal:

1. Any tool that contains cobalt in its alloy. The higher the percentage of this component, the better. Cobalt products differ from ordinary ones in a yellowish tint. Do not confuse the cobalt alloy with the application of this metal only to the outer part of the drill by electroplating. In the latter case, it will not be possible to drill through stainless steel.
2. Expensive specialized tool. Such pobedit drills can drill through stainless steel, not just concrete. They have a certain sharpening angle.
3. For thin stainless steel, you can use a feather-shaped drill bit for ceramic tiles. This is not the best option, but it will help to drill the workpiece once.

Application of cobalt drill

Of the old Soviet drills for stainless steel, the most suitable tool would be the one with the brand R6M5K5. This type of equipment contains up to 5% cobalt in the alloy. Due to this element, the tool acquires high strength, and the heating temperature can reach 135 degrees Celsius, which does not entail destruction of the material. Products of this quality can only be found in markets where old Soviet equipment is sold, and even then not always. An alternative to a domestically produced cobalt drill is a foreign analogue under the HSS-Co brand.

To drill stainless steel with a cobalt drill, you should also use lubricants and do not use high speed power tools.