Features Bulgarians repair of various brands

Danae article offers ways to find faults in the different models of grinders and angle grinders repair their own hands.Here you can find answers to questions about the order of dismantling gearboxes Bulgarians the most popular models, replacing the toothed gears, bearings and repair.The recommendations on the order of pressing and pulling out the gears and bearings, methods of repair and adaptation.

Along with common faults in angle grinders of different brands available and their features.This is not only the differences in the designs of Bulgarians, but also on the materials and components.

Another important relationship, who made the tool.repair grinders Interskol technology differs from technology troubleshooting grinders Bosch.

Knowledge of the Bulgarians in the design allows you to repair angle grinders with their hands quickly and qualitatively.

This article will help to repair any brand of angle grinders.
Along with the original instruments, the construction market was flooded with cheap imitations.And do not think that counterfeiting is made exclusively in China.Power
Chinese manufacturers of quality in no way inferior to producers from European countries or the countries of Southeast Asia.

quality Chinese manufacturers of tools for the European consumer are several input control stages.For third countries, Chinese manufacturers do not perform tool monitoring.But the tools are manufactured on the same lines, the same factories, the same people.That is why such a difference in price.

To repair the grinder with his own hands, it is necessary to have a scheme of the LBM and understand it.
Repair Bosch grinder is different from Bulgarian Interskol repair.And then there are Bulgarians under the brands Makita, Hitachi, Metabo.

Some general tips for organizing repair grinders

Before repair grinders look at a few useful tips:

1. Before removing grinders, carefully read its description, and the assembly scheme of work order.
2. Be sure to follow the sequence of technological operations.
3. Obey safety.

most frequent cause of failure is the grinder broken wire near the handle.First you need to check the presence of voltage on the button, it is done in the usual voltage tester.Then check the button itself on the performance.

For more information about diagnosing and repairing electrical grinders.

Removing needle bearing or sliding bearing cage destroyed

various bearings used in gearboxes Bulgarians.They are subjected to heavy loads and are the cause of the fault.

bearing destruction is determined to increase the backlash of the spindle shaft.

disassembled the gear housing and the dismantling of the large gear shaft, you will see the needle bearing.The needle bearing is not applicable in all Bulgarians.

in the same grinder, in which it is installed, its dismantling can be done in several ways.

Taking destroyed part of the bearing inner ring can get using machine tap.

Clamp machine tap the screwdriver in the appropriate diameter cartridge and try to screw it into the bearing cage until tap bottoms out in the bottom of the case.Continue to slowly twist the tap in the clip.He will lift the clip is threaded.

The second way is that the rest of the destroyed needle bearing cage can be removed using spetsbolta and retaining ring.

Removing the helical pinion gear grinders

Repair grinder gear begins with the dismantling of helical gears.That gear are the main cause of the fault gear grinders.

The Bulgarians often have to change a small lead gear, mounted on the rotor shaft.

on the rotor shaft helical gear can be fixed in two ways:

1. pinion fixed keyed and clamped with a nut.
2. Gear fastened with a threaded connection.And using the right-hand and left-hand thread.

Much driven helical gear is attached to the spindle shaft, too, in two ways:

1. Gear pressed onto the shaft.
2. Gear fastened with key connection.

Besides replacement gears in Bulgarian often required to replace one or the other bearing.Their design grinder at least three.
Replacement gear bearing grinders

Consider the features of several structures known manufacturers Bulgarians.

design features of the foreign producers LBM

In this chapter, we consider the design features of the Bulgarians, produced under the brands Bosch, Hitachi, and Makita, angle grinders and repair their own hands.

Repair angle grinders Bosch

grinder Bosh are a reliable tool, it does not cause much trouble to the user.

But not every user is assigned to the tool correctly.

Repair Bosch angle grinders often is associated with the replacement of bearings.

Structurally, all Bosch grinders are made by the same scheme.spindle shaft poz.25 pressed into the driven helical gear poz.26 and relies on the gearbox housing poz.821 needle bearing poz.51.

With the destruction of the bearing within the housing is a bearing cage, which is not easy to get.

recommend two ways to dismantle the cage needle bearing.They are described in the section "How to remove the needle bearing."

At deterioration or licking a pair of teeth of gears to be replaced and only two pairs.

dismantle gears, remember: the pinion gear is mounted on the rotor shaft on the thread, and the left and fixed nut.Driven by large helical gear poz.26 poz.25 pressed onto the spindle shaft.

How to replace bearings on grinder Bosch

Repair LBM Hitachi

especially popular among Russian consumers received grinder Hitachi.And it is natural.practically no artisanal forgery bolgarok Hitachi on the market.The simplicity of the design makes it easy to perform a repair of any complexity.

Hitachi Bulgarian firms have increased reliability and rarely fall on the table repairmen.The main reason for getting Hinachi grinder to repair, gearbox failure, namely, the development of gear teeth.

Understands grinder reducer easy.To disconnect the gear housing pos.3 poz.37 from the stator housing, it is necessary to release the carbon brushes.

position 1 Remove the four screws holding the gear housing and stator housing.Disconnect the gearbox housing and stator housing.disconnect gear housing together with the rotor position 8.

To remove the cover poz.23 gear, it is necessary to unscrew four screws poz.24.

Slave poz.33 spur gear fixed to the spindle shaft pos.26 using the key remover poz.25 and chafing.

bearing poz.21 removed stripper.

In Bulgarian Hitachi g13sb3 broken gearbox

Repair angle grinders Makita

peculiarity bolgarok family Makita is a quick protective cover poz.19.

Makita grinder firms are more likely to fall into the repair.But the reason for the high percentage of fakes flooding the Russian market.

currently Makita is a reliable, durable tool.But, like all Angle grinders, suffers failure of the gearbox, its gears.

To replace the gear reducer recourse in the event of their seizure or destruction.

to repair or angle grinders Makita 9069 Makita 9558 HN, grinders must be dismantled.

If nespraven gearbox, which determines the appearance of the backlash of the spindle shaft, jamming gear, stalling of the driven gear, the gear unit must be disconnected from the stator housing.

Free poz.35 carbon brushes, remove the four screws and remove the item 10 of the gear housing poz.37 stator housing.

In the next step, remove the four screws poz.18 holding cover poz.15 rotor.

driven gear pos.14 removed with the help of Persian.

Pinion poz.43 attached by key connection and secured poz.42 nut.

pos.3 rotor shaft bearings are removed by using pullers.

How to change gears on Makita 9558HN

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Features LBM designs domestic producers

Among domestic manufacturers of the special place occupied by the production of famous brands kakthen: Interskol, Fiolent, Lepse.

Repair LBM Interskol

can work for years For proper operation of the Bulgarian Interskol.

Along with infrequent failure of gear grinders, which are the weakest link in a pair of gears and bearings, instances of faults in the stator are marked.

To replace the gear reducer gearbox housing poz.19 need to disassemble, releasing cover pos.6.

driven gear pos.11 pos.8 pressed on the shaft and is removed by means of a press.Bearing pos.9 removed stripper.

Stator Repair Bulgarian Interskol can be done independently and, if you know the required data.When disassembling the burnt stator you have to count the number of turns of wire used, its cross section.

Video Repair Bulgarians burned stator

Repair LBM Lepse

grinder brand labeled LNA Lepse Lepse Kirov 1.8-230-A.These grinders trace their history to the famous Bulgarian IL Soviet production.Surprisingly tough tool, which is the most anti-vandal design.

Benefits Bulgarian Lepse consist in the possibility of replacing worn-out carbon brushes without disassembling the machine casing.

Repair LBM Lepse regarding brushes replacement is simple.A special window poz.45, stoppered, capped poz.48, carbon brushes poz47 inserted into the brush holder housing poz.46.

When repairing gear grinders Lepse necessary to dismantle a gear pair.

leading small helical gear is mounted on the rotor shaft on the spline nut and fixed.

driven gear poz.15 screwed on position 10 of the spindle shaft and fixed poz.18 nut.

Repair LBM Phiolent

Recently, a special popularity began to use grinders Fiolent.It attracts not only the reasonable price, but the reliability of the instrument.

Repair Bulgarian Phiolent own hands begins with the study of emerging problems.If you need to disassemble grinders Fiolent, then to remove the driven gear pos.11, it is necessary to press out from the shaft of the spindle position 8.

To remove the spindle shaft bearing, pre-need to remove the large helical gear.This is a minor inconvenience.

Replacing rotor bearing is connected with the fact that it is necessary to dismantle the small helical gear poz.22.

Fault Determination gear grinders Phiolent

What grinders repair their own hands can make the user

Although the Bulgarian and not a tool of special complexity, perform a repair operation, the user can not be on all the nodes.

Along with the simple replacement of bearings or gears the gearbox has such a fault that can not be made without special tools or Equip.

For Extrusion driven gear need press.Wind the rotor without tools fail.

These faults include failure of the rotor.For a mere consumer of such a failure ends going to the service center.

Advanced users can restore the burned rotor, having specific skills and concepts.But sometimes it's easier to buy new than to engage rewind.

For most users, grinders repair their own hands is limited to a certain range of problems.

Systematics troubleshooting electrical angle grinders

1. most simple fault, for which does not include Bulgarian, broken supply wire.Most often, there is an open in the power cord near the plug or an instrument input.The fault can be easily eliminated by replacing the power cord or removing the broken wire pieces.
2. Increased heat in the area of ​​installation of the carbon brushes.Most often this error occurs as a result of shortening of the carbon brushes is less than the nominal size.The length of the carbon brushes may not be less than 8 mm.
3. ceasing Bulgarian power button.The fault is associated with burnout internal contacts button.Eliminates the full replacement of the switch to a new one.
4. Some models LBM applied device that allows you to smoothly adjust the speed grinders.LBM speed controller improves smoothness enable Bulgarians and warns zakusyvanie working body.Repair LBM speed control is a complete replacement.

Grouping faults on the mechanical part of LBM

1. emergence of extraneous noise in the gear grinders, gear heat.The fault is associated with the destruction of the bearing support, wear the gear teeth of the gears, the drying of the lubricant.Eliminates replacement gears with high tooth wear.With low gear tooth wear can try to fix it.The tooth profile is corrected manually pripilivaniem using a round needle files and drills.Lubrication is replaced by a new one each time the gearbox repairs.New lubricant is applied to the parts thoroughly washed.
2. bearing replacement is required for its destruction, or the appearance of a large backlash.In some models bearing planted on the spindle tension.Replacement requires special Equip in particular press.Items must be cooled or heated.
3. Replacing the bearings on the rotor is required when a great beat.