Articles is the section intended for publishing our web entries. We will add a lot of interesting materials that you can find useful for power tool operation. The information contained at this section aims to advise you how to make a right choice and extend a tool lifetime.

Handling recommendations for Zenit™ power tools

Generally everyone wants to get either the most functional tool, or a tool, which is the most suitable for a specific type of work, most reliable and, of course, at a minimum price.

Generally everyone wants to get either the most functional tool, or a tool, which is the most suitable for a specific type of work, most reliable and, of course, at a minimum price. But every purchase is a compromise solution. One has to sacrifice technical characteristics and chooses simpler models. Others have to pay lump sums for expensive tools of famous brands. And of course everyone wants to get unlimited operational life. But let’s not forget, that high price itself doesn’t guarantee a stable operation for long years. The result is influenced by many factors with operational conditions and timely qualified maintenance in the first place.

With the help of our technical specialist we prepared a number of advices about how to take care of your power tools. Besides we tried to find out weak spots and ways to strengthen them.

The main requirement which will increase the chance of a good purchase is to clearly understand the type of work the tool will have to do. Don’t chase the power or other distinguished characteristics. Ask repair personnel about the instrument you are going to buy – they can tell you many interesting things. But even if the point at one model which they repair more often, it doesn’t mean it’s not reliable. If the model shows high sales, then it’s no wonder that it breaks more often.

Statistics shows that many power tools failures can be avoided. Of course, manufacturers take their share of the blame – anyone can buy defective tools. But most of such failures appear during the warranty period and are eliminated for free. Manufacturer of Zenit™ power tools implements more and more effective inspection methods of feed materials and final products and minimizes faults, so the chance to run into faulty tools is not that big.

Main reasons of breakdown are mishandling, nonchalant attitude: carelessness, lack of minimal maintenance. Often it is enough to adjust the saw tension, sharpen or change the plane iron, clean the dust bag of the polishing machine – these simple actions allow avoiding expensive repairs.

Work with power tools is often accompanied by dust, chips and other small debris. The amount of dust can be different – small or large, depending on work type and process material. User is often protected by safety glasses and face mask, but the tool itself needs protection – abrasive dust penetrates through air vents, obstructs motor cooling, makes bearings inoperative and destroys motor winding insulation. Manufacturers protect their tools in many ways but it is impossible to eliminate the problem completely. There are two ways to prevent the blockage: first is to hinder the dust penetration with different filtering materials. Such method has a right to exist, but in such a way motor cooling efficiency is decreased, which may lead to motor overheating. So this method is recommended while performing an occasional small-scale job.

Second method is more effective – remove dust and chips from work area with the help of a shop vacuum. Design of many tools enables connection of a vacuum directly or through a special adapter. Usage of a shop vacuum allows to work without additional protection. Besides it improves vision on work area. But the main thing – it dramatically decreases power tools wear rate.

But there is one substantial defect. Conventional home vacuum cleaners are not suitable for this – they let fine dust through and special industrial vacuum cleaners are rather expensive. We recommend cleaning your tools after work, blowing vent holes and air channels with a compressor or a vacuum cleaner. Attention: it is forbidden to clean blocked channels with metallic objects (screwdrivers, nails etc.). It is better to use an appropriately sized wooden stick.


Rotary hammers
This is the most complicated tool. It is not recommended to maintain rotary hammers by yourself.

The most loaded component is drill cylinder, as it imparts rotator and back-and-forth movement to the drill while working in an aggressive environment. Concrete dust gets inside and increases the wear rate. That’s why you should keep the chuck clean and protect the chuck slinger – it should be free of cracks and ruptures.

Every time when installing a drill grease its shank with lithium grease.

Another advice for users is to buy quality drills and bits. Low quality drills can damage internal components of the rotary hammer.

Drilling holes in the ceiling can be dangerous for your rotary hammer – dust falls directly on the chuck. But a special dust-catching cap from the Zenit™ package can protect your chuck from dust.

Remember: characteristics indicated in a catalogue or on a plate are the maximum allowed. Maximal output is reached at much lower values. Thus if indicated concrete drilling diameter is 24 mm, drills with diameter 14-16 mm should be installed. In such a way long-term service is achieved.

Brush replacement
Usually this procedure is performed by the user - many power tools have special brush covers for easy replacement of motor brushes. Usually spare brushes are supplied as a set. Always replace both brushes at the same time. If your tool doesn't have brush covers, you'll have to let a repair shop do the work.

Impact drills
This is the most common type of power tools. And the most universal one – it is used not only for drilling different materials, but also for screwing screws and mixing different compounds. One should not forget that impact function is an additional one, so it is very sensitive to heavy loads. It can easily handle brickwork but full-scale concrete work is not permitted.

Drills have three most common malfunctions – motor malfunction due to overload, impact function extenuation due to natural wear and tear and drill holder breakage. In order to prevent chuck breakage you should periodically clean it from dirt and grease with WD-40 aerosol grease or analog.

Hot air gun
Most hot air guns have micro motors, whose steel shafts rotate in bronze bushings. Traction coefficient of steel on bronze is small, that is why in normal mode bushings don’t require any grease. But when dust gets inside its abrasive effect gradually increases the dead stroke. It is useful to blow the motor with compressed air. As a rule, when dead stroke appears, specialists in service centers change motors as they are nonrepairable.

The same malfunctions are caused by using flap attachment for paint removal. When moving the gun horizontally or downwards there is no problem. But often users act vice versa – bottom upwards and sometimes paint falls inside the gun and damages the element.

Bear in mind that it is prohibited to drop heating fans. Even knocking the table with fan in order to remove dirt can damage the heater.

Hands off
The last thing is about things you shouldn’t touch. As was mentioned before, rotary hammers have the most complicated structure. Their repair and maintenance should be performed by service specialists. “Intrusion” intoother power tools is also not desirable, as some models require professional adjustmentafter assembly.