How to disassemble the gearbox of an impact drill Zubr 850

The best impact drills

When drilling in brick, concrete, percussion mechanism is simply necessary without prior impact, the cutting edge of the drill simply can not grasp the material. Meanwhile, to have at home a full-fledged peorator hardly justified this heavy tool is too highly specialized, so not surprisingly widespread on the market drills with a percussive mechanism. The best impact drills (according to the reviews of craftsmen and experts) are presented in our rating.

Impact drill ZUBR ZDU-850 ERMKM2

Register online and get special from the first purchase!

This product is delivered prepaid.

Gross weight 4.4 kg
Net Weight 2.8 kg
Built-in dust extraction system no
Two or more mechanical speeds no
Max. drilling diameter (wood) 25 mm
Max. drilling diameter (metal) 13 mm
Work area illumination no
Speeds 1
Country of Origin China
Spindle with hexagonal recess for bits no
Electronic speed control yes
Chuck diameter 13 mm
Constant RPM no
Max. speeds 2800 rpm
Professional no
RPM (rpm) 0-2800
Max. drill diameter (concrete/stone) 13 mm
Number of shocks 44800 rpm
Chuck type key
Cable length 2 м
Reverser yes
Packed in case
Manufacturer’s item codes ZDU-850 ERMKM2
Power (W) 850 W
Instructions

Impact drill Zubr ZDU-850 ERMKM2 reverse gear chuck 13mm chuck reverse 0-2800 rpm

Impact drill ZUBR ZDU-850 ERMKM2 is equipped with additional handle-case, which is convenient for storage of spare accessories. Key chuck more reliable in hard materials. Metal gear housing and gears made of chromium alloy guarantee a long life. Bricks and concrete can be drilled with the impact function. Model is delivered in a case, which solves the problem of storage and transportation.

Technical Specifications:- Power: 850 Watt;. Number of speeds: 1;. Max. drill diameter (metal): 13mm;. Max. drill diameter (wood): 25mm;. Backlight: no;. Reverse: yes;. Impact: yes;. RPM control: yes;. Chuck type: wrench;. Weight: 2,8kg;. Spindle speed: 0-2800 rpm: 0-2800 rpm;- Max drill diameter (concrete): 13mm;- Accessories: case/case;- Impact frequency: 0-44800 beats/min;- Automatic brushes shut off when worn out: no;- Max chuck size: 13mm;- Chuck size: 1,500-13,000mm;- Soft start: yes;- Easy access to brushes: no;- Brush wear indicator: no;- Frostproof cable: yes;

Features:. Key chuck. electronic speed control at the touch of a switch. metal gear housing. For better heat dissipation;. Start key lock. for continuous use;- Rugged construction with precision ball bearings. For long service life of the percussion unit;- Graphite brushes with extended service life (service life of at least 50 hours);- Additional pencil handle. Metal gear housing for tool retention and tool storage. For easy storage and transportation of the Zubr ZDU-850 ERMKM2 impact drill.

Accessories:. Electric impact drill;- Additional handle;- Chuck key;- Depth gauge;- Safety instructions;- Operating manual;- Case;

Dimensions and weight:. Weight: 3,97 kg. Length: 366 mm. Width: 310 mm. Height: 97 mm.

Country of Origin: China.The company decided to extend the 5-year extended warranty on power tools “Zubr” sold since July 1, 2012.The warranty period starts on the date of purchase by the first owner.Basic Warranty.The warranty period lasts 36 months from the date of purchase and is applicable only during unconditionally residential use.The warranty period is 12 months from the date of sale if the tool is used for work connected with professional activities under medium load conditions, with the exception of industrial and manufacturing activities under high load conditions and extra heavy loads.Extended Warranty.For all power tools bought after the 15th of July 2012 the warranty period is 12 months.02.2012 г., The warranty period is extended to 60 months for home use and 36 months for light-duty professional use, excluding heavy-duty industrial and extra heavy-duty applications.Extended warranty is provided only if the owner registers the tool within 4 weeks after the purchase at the Zubr company site.Registration is performed only on the manufacturer’s website in the Service area. The registration certificate, which must be printed on the printer during registration, confirms that you are participating in the Extended Warranty program for the specific tool and that the tool has been registered correctly.Registration is only possible if you agree to the storage of the data you have requested during registration.

The price on the site is valid only when ordering through the online store and may differ from the in stores

Impact drill Zubr ZDU-850 ERMM2

Register on the site and get special from the first purchase!

This product is delivered on prepayment.

Gross weight 3.2 kg
Net Weight 2.8 kg
Integrated dust extraction system no
Two or more mechanical speeds no
Max. drilling diameter (wood) 25 mm
Max. drilling diameter (metal) 13 mm
Work area lighting no
Speeds 1
Country of Origin China
Spindle with hexagonal recess for bits no
Electronic speed control yes
Chuck diameter 13 mm
Maintaining constant RPM no
Max. speeds 2800 rpm
Professional no
RPM (rpm) 0-2800
Max. drilling diameter (concrete/stone) 13mm
Number of strokes 44800 rpm
Chuck type key
Cable length 2 м
Reverse yes
Packed in box
Manufacturer’s item codes ZDU-850 ERMM2
Power (W) 850 watt
Instructions
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Impact drill Zubr ZDU-850 ERMM2 reverse chuck 13mm 0-2800 rpm 0-44800dpm 850W box

Impact drill Zubr Professional ZDU-850 ERMM2 is used for drilling in wood, steel, lightweight concrete and bricks. Has a wide speed adjustment range. Gear case made of die-cast aluminum for high strength and better heat dissipation. Impact gears made of chromium alloy significantly increase the service life of the impact mechanism. Switch can be locked in place for extended periods of operation. Rubber insulated cable is resistant to frost.

Technical Specifications:- Power: 850 Watt;. Number of speeds: 1;. Max. drill diameter (metal): 13mm;. Max. drill diameter (wood): 25mm;. Backlight: no;. Reverse: yes;. Impact: yes;. Chuck mount: 1/2;. RPM control: yes;. Chuck type: Key chuck;. Constant RPM under load: no;. Weight: 2,8kg;. Dimensions: 345x270x80mm;- Spindle speed: 0-2800 rpm;- Max. drilling diameter (concrete): 13mm;- Accessories: box;- Impact frequency: 0-44800 beats/min;- Automatic shutdown when brushes wear out: no;- Max chuck size: 13 mm;- Chuck size: 1.5-13 mm;- Soft start: yes;- Easy access to brushes: no;- Brush wear indicator: no;- Frostproof cable: yes;

Features:. Powerful drill for tough jobs;- Reversible direction of rotation;- Rubber-insulated cable with water-repellent impregnation;- Robust gear housing increases reliability due to stability of geometric dimensions;- Special lithium-based grease with low pour point;- Electronic speed control in a wide range extends the possibilities of using the product;. Reliable design on ball bearings for minimal spindle runout;- Reliable holding Zubr Professional ZDU-850 ERMM2 thanks to rubberized main handle and comfortable additional handle;- Drilling depth limiter allows drilling precisely at the set depth during regular operation;- Change of rotational speed by pushing the switch ensures smooth drilling start to avoid drill bit carry-over as well as quicker drilling.

Accessories:. Chisel key, chuck key, user’s manual, box;

Dimensions and weight:- Weight: 3,20 kg;- Length: 340 mm;- Width: 80 mm;- Height: 270 mm.

Country of production: China.The company has decided to extend the 5-year extended warranty on power tools “Zubr” sold since July 1, 2012.The warranty period starts on the date of purchase by the first owner.Basic Warranty.The warranty period is 36 months from the date of sale, but only if the tool is used for personal purposes in the home.The warranty period is 12 months from the date of sale if the tool is used for professional applications with medium loads, excluding industrial and commercial applications with high and extra heavy loads.Extended warranty.For all power tools purchased after 15.02.2012 г., the warranty period is extended to 60 months in case of unconditional domestic use and 36 months in case of use for works associated with professional activity under medium intensive loads, except for industrial and industrial works under high intensity and extra heavy loads.Extended warranty is provided only if the owner registers the tool within 4 weeks of purchase at the Zubr website.Registration is carried out only on the site of the manufacturer in section Service. The proof of participation in the Extended Warranty program for a particular tool and correct tool registration is the registration certificate which must be printed on the printer during registration.Registration is possible only after the customer confirms that he/she agrees to save the personal data requested in the registration process.

The price on the site is only valid when ordering through the online store and may differ from the in stores

Zubr 850 Watt impact drill in a case, Professional series (ЗДУ-850 ЭРМКМ2)

The company makes returns and exchanges of this product in accordance with the legal requirements.

Return periods

Returns are possible within 14 days after receipt (for goods of proper quality).

The return delivery of goods is by agreement.

Pursuant to article 30, paragraph 1, of the Law of the Republic of Kazakhstan “On the Protection of Consumer Rights.1 of the Law of the Republic of Kazakhstan “On Protection of Consumer Rights” The seller (manufacturer) is obliged to provide exchange or return of nonfoods of appropriate quality, if they have not been used, their trade dress, consumer properties, seals, labels, and a document confirming the fact of the purchase of goods within fourteen calendar days, unless a longer period is set by the contract, from the date of purchase of goods. LAW OF THE REPUBLIC OF KAZAKHSTAN On protection of consumer rights Paragraph 1.15 Consumer. A natural person who intends to order or purchase or who orders, purchases and/or uses goods (works, services) solely for personal, family, household or other uses not related to business activities. Exchange / return of goods of proper quality are not made to legal entities, unless it is not stipulated in the contract of delivery.

Zubr 850 Watt Impact Drill, Professional Series (ZDU-850 ERMM2)

The company carries out return and exchange of this goods in accordance with the requirements of the legislation.

Return Policy

The return is possible within 14 days after the receipt of goods (for goods of proper quality).

The return delivery of goods is by agreement.

disassemble, gearbox, impact, drill, zubr

According to Article 30 clause 1 of the Consumer Protection Law of the Republic of Kazakhstan.1 of the Law of the Republic of Kazakhstan “On Protection of Consumer Rights” The seller (manufacturer) is obliged to provide exchange or return of nonfoods of appropriate quality if they were not used, their trade dress, consumer characteristics, seals, labels, and a document confirming the fact of goods purchase are kept within fourteen calendar days, unless a longer period is set by the contract, from the date of purchase of goods. Consumer Rights Protection Law of the REPUBLIC OF KAZAKHSTAN Paragraph 1.15 Consumer. A natural person who intends to order or purchase or who orders, purchases and/or uses goods (works, services) solely for personal, family, home or other purposes not related to business activities. The exchange / return of goods of proper quality to legal entities are not made, if this is not stipulated in the contract of delivery.

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Overview of the ZUBR ZDU-850 ERMM2 impact drill, “PROFESSIONAL” series

I decided to take this model because this model has electronic speed control and the gear housing is made of metal. Also Gearbox is protected from overheating by metal case. Also, as the manufacturer wrote. The drill is built to last because of precision ball bearings and reinforced drive elements.

The drill comes in a cardboard box. The model comes without carrying case.

Includes: handle, chuck wrench, drilling depth limiter and instruction manual.

This drill has two modes: rotary drilling (drilling with impact) and normal drilling that can be changed with the switch. As stated by the manufacturer this model has a maximum idle speed: 2800 rpm, and maximum blows per minute: 44800. As there is a reverse mode, so this drill can be used instead of an electric screwdriver.

Compared with the old drill 750 watt, it is not hot and drills easily.

When drilling large diameter holes without an additional handle is not safe, because the drill has a lot of power and can twist your hand. The handle of the drill is very handy, you can without any keys to loosen and rearrange in a comfortable position.

The drill itself is well constructed: it does not squeak, nothing is loose, there are no cracks. The housing is robust and solid, and does not feel cheap. The drill fits well in my hand and does not slip thanks to its rubberized coating.

I would also like to note that all tools from this manufacturer have a very soft and high-quality 2-meter cord (does not break like other devices)

Also all Zubr tools have a 5 year warranty, which I think is a big plus.

Disadvantages until noticed. I’m happy with my purchase. I recommend this device to everyone. The quality, reliability, and most importantly, cheap. I have been using it for 2 months now. Hasn’t let me down yet. I hope it serves me well for a long time.

Review: Zubr ZDU-850ERM impact drill. Let’s support domestic gnoprom!

Continuing to sort worthy tools of domestic gnoprom from unworthy.

Как разобрать дрель Hammer, how to disassemble a drill

disassemble, gearbox, impact, drill, zubr

I bought this drill probably 5 years ago. I needed it. к. We had a lot of moves within the city. I had to assemble and disassemble the furniture 10 times, and for it to hold at least somehow. I had to drill new screw holes several times and then drive self-tapping screws with the same drill. In general, I thought everything was just fine. Then my mom and I bought a condo and the drill got lost somewhere. It was gathering dust for a few years and now I dug it out. Of course, now I already have something to compare it with, so now I have a slightly different impression.

This is what the drill looks like. Bought for 1800r, what is the price now. I have no idea. The power is 850 watts and the chuck speed is 2800 rpm. There is reverse, a speed knob and a trigger lock button. It uses a keyhole chuck.

The auxiliary handle has a bolt attachment. Standard fixture for most drills in this price range.

But it was nice that the handle is made of metal with a rubberized grip. Although the rubber is of incomprehensible quality. Usually this is done to increase comfort and reduce vibration while drilling, but. that’s not right.

Looks like it’s about to fall out. It wasn’t like that originally.

Reverse is the standard checkbox here, but it’s a little tight. You can break it if you are not careful. The start button, unfortunately, jams. The ring for maximum speed adjustment turns very tight, so you have to adjust the speed simply by not pressing the starter button.

The main handle is also rubberized, but it is not clear what kind of rubber it is. Clearly not for comfort, but rather purely for the report.

At the very bottom there is a rubber bracket for the chuck wrench.

Using a motor to tighten the drill doesn’t make much sense. You have to tighten it with a wrench anyway.

There is a mode switch on top of the gearbox. drilling, drilling with impact.

We will talk about the second mode separately. For now let’s pass from the description of appearance to the way the drill is in operation.

For drilling at low rpm (about 1500 rpm) the drill is not suitable, t. к. Even the straightest drill bit at these speeds will chatter mercilessly. And it is not the contact surface that is chattering, but the chuck. And it explains, why in the hole (wood) with a diameter of 3 mm self-tapping screws with a diameter of 4 mm had no problem at all with a centimeter, not even clinging to the hole with the thread. At maximum speed this mistake was not so pronounced. That’s one.

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Secondly, the weight of the drill is not very well balanced. For example, if you hold it with one hand like this

it’s pulling forward quite well. As a consequence, the hand is very strained. And if you drill tiles with it, the drill bit is guaranteed to go sideways and you’ll have to re-drill. The same happens if you hold the drill with both hands and use the auxiliary handle. And I thought I was so weak-handed that I can’t even get into the marking. Although. Maybe it’s not even the weight distribution, but the chatter (remember what I told you earlier).

It’s about the same when you’re drilling in this position.

The drill tries stubbornly to take such position under the action of its own weight.

Т. е. If you drill on the floor, the hole is definitely not perpendicular to the floor.

Result. It is very difficult to drill something at a right angle with this drill.

But that’s not all. I tried to open it up to dust it off. Definitely will not be superfluous. I want to warn you in advance. DON’T TRY THAT AT HOME.

We couldn’t disassemble the whole body, only a part of the grip.

The second part of the body is not collapsible, it is factory soldered. The only way to disassemble it further. is to unscrew these screws on the gearbox.

And there’s another screw hidden under the chuck.

We see two gears. One goes from the motor and the second is the “percussion mechanism”. There’s absolutely nothing to lubricate it. The consistency resembles wax from which the candles are melted.

If you look closely, the grease near the motor gear is already in sawdust. And I did not use the drill much. There’s not even a hundred holes. Now let’s look at the second part of the gearbox.

It’s even simpler. One pinion with two gear positions. This is a better view from this angle.

The teeth on the edge always work and the pinion in the center. only when using the “percussion mechanism”. Why in quotation marks?? Because in this case, the two gears are joined together. One is stationary and the other is rotated by the motor. As a consequence, they slide against each other, the drill starts to vibrate back and forth like hell. Т. е. Actually, it’s not even a bump, it’s a vibration. On the brick, of course, it will help, but in concrete, it will be useless.

The condition of the grease, as I said, leaves much to be desired. However, the design of the gearbox does not allow for a normal swab. If you grease the small and large non-impact gears, the grease will “slip off” very quickly, stick to the impact gears and not be very good. Т. е. You either need twice as much as you have, or there’s no point in changing it at all.

Next, I took the risk of removing the second part of the gearbox from the housing as well. Together with the anchor.

After cleaning the anchor from dust, I also removed this plastic collar.

I dusted it off, too. And here is more. trouble 🙁

There is a lot of dust and dirt, but to get all this stuff out of there, I did not dare. And, as it turned out, did the right thing. к. even putting the anchor in place proved to be problematic. The brushes were springy and the anchor refused to budge into place.

I had to spring back the brushes with a flat screwdriver and drive the anchor carefully, but with force. In general, I was struggling with installing the anchor for about 30 minutes. And then I found out that I forgot to put the black cuff back in place. It took me about an hour and a half to put it back together. While assembled. I learned a few new obscene words from myself, which, having heard them, I would not understand neither the employees of public utilities, nor workers of Russian Railways, nor builders, nor anyone else.

So, to summarize. The brand is Russian, assembly is Chinese. The quality of drilling is terrible, the weighting does not allow to drill a hole as it should be drilled, the drill bit is chattering at low rpm and there is no point in disassembling it at all. you’ll have a hard time putting it back together. So this is the case when, showing patriotism, it is better to pass by the Russian brand.

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Impact drills: pros and cons, choice and application

An electric drill is a useful hand-held tool that operates from an electrical network. Main purpose: drilling holes in any material. Modern drills are mostly made universal, the drill can be used as a mixer, an electric screwdriver, peorator and so on.

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