How to remove the anchor from the punch

Microdermal Dermal Anchor Removal at MediZen Cosmetic Clinic, Birmingham UK

How to remove the bearing from the anchor angle grinder?

Today, home and professional craftsmen use several methods to solve this problem. If it becomes necessary to remove the bearing from the armature of an angle grinder or other tool, this can be done using the following devices:

• Strippers. These are special devices that allow you to easily and safely remove bearings of different sizes from the anchor of an angle grinder. The use of pullers practically does not require the use of physical force, even if the bearing is tightly seated. The centering mechanism ensures the simultaneous installation of the device’s grippers. It can be used in any position. Before removing the bearing, you need to clean the armature shaft of the angle grinder from old grease, chips, sand, so that nothing interferes with removing the part. The centering mechanism allows the puller to position itself precisely. If the bearing is intact, and the dismantling process is carried out for inspection, it should be pulled out by the inner ring so as not to damage it. For large anchor shafts, an angle grinder use a massive puller with three or four gripping arms, and for small ones, devices with replaceable plates or straps are suitable..
• Hammers, chisels, wrenches and other tools at hand. In this case, in order to remove the bearing from the anchor of the angle grinder, it is heated with gas, squeezed in a vice, grinded, chopped and many other operations are performed. These methods, of course, can be effective, but there is a great risk that the part’s seat will be mechanically damaged. And often the bearing itself after such manipulations without a puller will be unsuitable for further use. In addition, the performer may be injured due to pieces of clip hitting the face, eyes or head, which fly apart after impacts..

As practice shows, pullers are more effective in this situation. They allow you to quickly, easily and without much risk remove the bearing from the armature of the power tool and inspect parts or replace them. If you have to periodically carry out such operations, you should acquire such a useful device. The use of improvised devices is permissible only if you have experience in repairing power tools and an urgent replacement of a part is required.

How to remove a bearing from the armature in order to check its performance?

The condition of the bearing on the motor of the power tool must be given due attention. When it wears out above the permissible limit, overheating occurs, and the motor starts to run noisily. If the bearing is not removed from the armature in time, then the stationary and moving parts will begin to touch each other when it rotates when it is running. And this, in turn, threatens with serious damage to the electric motor. This will require replacement of the rotor or armature. Checking the bearings is pretty straightforward. To do this, you need to install the motor on a solid surface, put your hand on top of it and rotate the shaft. The rotor must move freely and not jam. If you hear scratching noises or feel uneven rotation, this will be the first call to the fact that it is necessary to remove the bearing from the anchor and fix the malfunction..

Any bearing has backlash, that is, clearances. Their presence is quite acceptable, however, it is important that the indicators do not go beyond the permissible limits. Check for backlash:

• radial, or longitudinal. To do this, put the engine on a solid surface and try to tilt the shaft in different directions with your hand. The amount of offset depends on the size of the part. For household power tools, deviations should be barely noticeable;
• axial. The check in this case is simpler. It is necessary to take the shaft with your hand and pull or push the rotor in the opposite direction. In household appliance motors, deviations should not exceed 3 mm. The closer this figure is to zero, the better..

If during the disassembly of the electric motor you notice traces of friction of parts, it means that the bearings have worn out. It is necessary to immediately remove the bearing from the armature and replace the spare parts. This will allow you to avoid negative consequences in the form of engine breakdown or complete failure of the tool..

How to remove a bearing from an armature of a power tool: a few practical tips

Today, many DIYers and professional craftsmen have a whole arsenal of power tools that help them cope with domestic and repair and construction tasks. Rotary hammers, jigsaws, angle grinders, drills – all of them greatly simplify and speed up work. However, it happens that the power tool breaks down. Do not rush and send it to the trash because of this. Due to intensive use, the parts wear out, and therefore the equipment cannot work in normal mode. If you know how to remove the bearing from the anchor of the power tool, you can extend the life of your “helper”. Timely replacement and lubrication of parts allows you to operate the device for a longer time.

The main task of the motor of the power tool. it is rotation. The anchor is that important part of the device that makes the working mechanism rotate. The service life of the part depends on the power and speed, as well as the activity of the equipment use. Bearings are needed to reduce friction while moving parts. They provide smooth rotation and improve the running mechanism of the power tool. If the bearings are monitored and lubricated in a timely manner, their service life increases several times..

Features of pressing the bearing onto the engine armature

After you have successfully removed the bearing from the anchor, it is necessary to carry out a number of necessary manipulations before assembling the equipment. If you are installing new parts, it is necessary that they match exactly in width, as well as inner and outer diameters, with the old bearings. It is important that no dirt or dust gets inside the product during installation, because this can lead to corrosion, chips and all kinds of damage. The bearing is mounted on the anchor using a metal pipe, which must first be lubricated. During the pressing process, it is important to ensure that there are no distortions. You should also observe the following nuances:

• lubricate the bearings with a special thick substance. It can be moisture resistant;
• only ½ (for equipment with rotation up to 300 rpm) or 1/3 (for faster tools) of the bearing chamber is filled with grease. You should not put more substance, because all the excess will still be squeezed out during rotation.

Sometimes the process of fitting the bearing onto the armature is simplified if it is preheated in boiling oil. However, you need to be very careful in this case and make sure that the part does not heat up above 100 ° C..

Dismantling the quick release chuck

Two types of chuck are most commonly used in Bosch rock drills: SDS-plus chucks and SDS-max chucks. The difference between them in the principle of clamping the tail of the working organ.

The device of the Bosch hammer drill chuck differs in the design of the tool landing rods, depending on the SDS-plus or SDS-max model. In addition to the listed types of cartridges, there are SDS-top, SDS-quick cartridges.

The difference between the attachment points of the cartridges

The procedure for disassembling the chuck of the Bosch 2-26 hammer drill is simple:

• remove the rubber tip, pos. 34;
• take out the retaining ring, pos. 87;
• remove the steel washer pos. 833;
• remove the conical spring, pos. 833;
• carefully, so as not to lose, using a magnet, remove the barrel balls pos. 89.

SDS-plus chuck

Carefully inspect all parts of the cartridge.

Disassembled SDS-plus quick release chuck

SDS-plus chucks have been specially developed for drilling tools. The diameter of the tool shanks is 10 mm, the length of the working tool is in the range of 110 … 1000 mm. The diameter of the drills is in the range of 4 … 26 mm.

Replacing and connecting the stator

• Remove the stator from the electrical box. Put a new one in its place..
• Screw in the fixing bolts.
• Install the air intake.
• Start connecting the windings. Connect the two ends of different windings to each other and connect to the nearest brush. Connect the other two connected ends to the start button. Also connect the wire from the second brush to the button.

How to disassemble a puncher

Disassemble the punch in sequence. Inspect all parts carefully. Even if you are looking for a problem in one node, you can find damaged parts in other nodes. When disassembling the tool, clean the body from dust and dirty grease..

Disassembly of the percussion barrel assembly

• disassembly of the Bosch perforator barrel assembly begins from the side of the cavity, taking out the cylinder poz.26 with the hammer poz.27;
• the firing pin assembly must be removed from the cavity;
• from the side of the chuck shaft, remove the retaining ring, pos. 85, the steel ring, pos. 38, and one more retaining ring, pos. 85;
• remove the spur gear pos. 22.

Impact mechanism assembly, countershaft and drunken bearing

Other mechanical failures and their elimination

In addition to breakdowns associated with the percussion mechanism, other mechanical breakdowns may occur in the hammer drill..

Malfunctions and their causes

Frequent punch malfunctions:

• does not turn on. Check the electrical circuit;
• the puncher does not hit. Breakage in the impact mechanism;
• the tool does not twist, does not drill. Reasons: armature bearings, armature gear, reducer;
• the drill takes off, does not hold. Chuck or bushing malfunction;
• sparking in the electrical case. Reasons: violation of the armature winding insulation, wear of the brushes, collector, clogging of the brush holders;
• sparking in the area of ​​the power button. Faulty button contacts or wires;
• the puncher is heating up. The reason is worn brushes, short circuit of winding turns, poor lubrication of the gearbox;
• the hammer drill does not hold the chuck. Retaining ring or retaining washer broken.

How to remove a stuck drill from a hammer drill chuck

Installation of brushes

Before inserting the brushes into place, it is necessary to clean the brush holders from carbon deposits. This is done with a rag soaked in solvent. It is preferable to remove carbon deposits in the form of particles obtained with intense sparking with a small file. The cleaned brush holders are installed in place, brushes are inserted into them and clamped from above with latches.

The brush is installed in the brush holder

How to Repair or Replace Makita Rotary Hammer Brushes 2450 and 2470

The fact that the perforator brushes need to be replaced is indicated by increased sparking in the area of ​​the rotor collector, a burning smell, heating of the brush holders.
In a new or refurbished hammer drill, the spark under the brushes is even, of constant length and there is no spark separation in a circle.
Wear of bearings, damage to the insulation of the rotor or stator is clearly indicated by a spark around the entire circle of the collector. The appearance of this kind of spark indicates burnout of the collector plates, failure of the rotor or stator..

How to remove a bearing from the armature in order to check its performance?

The condition of the bearing on the motor of the power tool must be given due attention. When it wears out above the permissible limit, overheating occurs, and the motor starts to run noisily. If the bearing is not removed from the armature in time, then the stationary and moving parts will begin to touch each other when it rotates when it is running. And this, in turn, threatens with serious damage to the electric motor. This will require replacement of the rotor or armature. Checking the bearings is pretty straightforward. To do this, you need to install the motor on a solid surface, put your hand on top of it and rotate the shaft. The rotor must move freely and not jam. If you hear scratching noises or feel uneven rotation, this will be the first call to the fact that it is necessary to remove the bearing from the anchor and fix the malfunction..

Any bearing has backlash, that is, clearances. Their presence is quite acceptable, however, it is important that the indicators do not go beyond the permissible limits. Check for backlash:

• radial, or longitudinal. To do this, put the engine on a solid surface and try to tilt the shaft in different directions with your hand. The amount of offset depends on the size of the part. For household power tools, deviations should be barely noticeable;
• axial. The check in this case is simpler. It is necessary to take the shaft with your hand and pull or push the rotor in the opposite direction. In household appliance motors, deviations should not exceed 3 mm. The closer this figure is to zero, the better..

If during the disassembly of the electric motor you notice traces of friction of parts, it means that the bearings have worn out. It is necessary to immediately remove the bearing from the armature and replace the spare parts. This will allow you to avoid negative consequences in the form of engine breakdown or complete failure of the tool..

How to remove the bearing from the anchor angle grinder?

Today, home and professional craftsmen use several methods to solve this problem. If it becomes necessary to remove the bearing from the armature of an angle grinder or other tool, this can be done using the following devices:

• Strippers. These are special devices that allow you to easily and safely remove bearings of different sizes from the anchor of an angle grinder. The use of pullers practically does not require the use of physical force, even if the bearing is tightly seated. The centering mechanism ensures the simultaneous installation of the device’s grippers. It can be used in any position. Before removing the bearing, you need to clean the armature shaft of the angle grinder from old grease, chips, sand, so that nothing interferes with removing the part. The centering mechanism allows the puller to position itself precisely. If the bearing is intact, and the dismantling process is carried out for inspection, it should be pulled out by the inner ring so as not to damage it. For large anchor shafts, an angle grinder use a massive puller with three or four gripping arms, and for small ones, devices with replaceable plates or straps are suitable..
• Hammers, chisels, wrenches and other tools at hand. In this case, in order to remove the bearing from the anchor of the angle grinder, it is heated with gas, squeezed in a vice, grinded, chopped and many other operations are performed. These methods, of course, can be effective, but there is a great risk that the part’s seat will be mechanically damaged. And often the bearing itself after such manipulations without a puller will be unsuitable for further use. In addition, the performer may be injured due to pieces of clip hitting the face, eyes or head, which fly apart after impacts..

As practice shows, pullers are more effective in this situation. They allow you to quickly, easily and without much risk remove the bearing from the armature of the power tool and inspect parts or replace them. If you have to periodically carry out such operations, you should acquire such a useful device. The use of improvised devices is permissible only if you have experience in repairing power tools and an urgent replacement of a part is required.

Features of pressing the bearing onto the engine armature

After you have successfully removed the bearing from the anchor, it is necessary to carry out a number of necessary manipulations before assembling the equipment. If you are installing new parts, it is necessary that they match exactly in width, as well as inner and outer diameters, with the old bearings. It is important that no dirt or dust gets inside the product during installation, because this can lead to corrosion, chips and all kinds of damage. The bearing is mounted on the anchor using a metal pipe, which must first be lubricated. During the pressing process, it is important to ensure that there are no distortions. You should also observe the following nuances:

• lubricate the bearings with a special thick substance. It can be moisture resistant;
• only ½ (for equipment with rotation up to 300 rpm) or 1/3 (for faster tools) of the bearing chamber is filled with grease. You should not put more substance, because all the excess will still be squeezed out during rotation.

Sometimes the process of fitting the bearing onto the armature is simplified if it is preheated in boiling oil. However, you need to be very careful in this case and make sure that the part does not heat up above 100 ° C..

All power tools begin to fail over time. Faults are divided into mechanical and electrical. Of the electrical faults, the most common faults are those associated with the failure of the brushes. In second place: failure of the armature bearings. Less common malfunctions associated with failure of the stator or rotor.
And how to correctly determine the malfunction of the stator, rotor of the Makita 2450 and 2070 hammer drill, replace the brushes? And here the schematic diagram of the Makita 2450, 2470 perforator will help us.

How to remove the stator of the Makita 2450 and 2470 hammer drill for accurate diagnostics and repair

To remove the stator pos. 59, you need to remove the brushes, unscrew the four screws securing the cover of the mechanical block. They are screwed into the end of the lid..
Pulling the black housing and the green one in different directions will release the housing with the stator. The stator is fixed in a green housing.

To remove it, you need to remove the plastic gasket pos. 58 and knock on the end of the body with a wooden mallet or a bar. The stator will stick out by itself, it remains to pull it out, blow it off and check it completely.

Here comes the stator

If you have a short circuit tester, you can immediately check the stator for a short circuit. The device is called IK-32.
The procedure for checking the stator windings
For an accurate check, disconnect the two stator windings from each other in an electrical circuit. Check the resistances of each winding, they should be exactly the same. With a difference in resistance, a winding with a lower resistance is likely to have an interturn short circuit..

Checking the stator of the Makita 2470 and 2450 punch with your own hands
Diagnostics of the armature, stator with a short circuit device and homemade products

How to check if a Makita rotary hammer rotor is working properly

Checking the suitability of the rotor in the Makita hammer drill begins with its dismantling from the body.
But first you need to do external research. If in the rotor a spark from the brushes on the collector covers the weight of the collector, if during operation the perforator does not develop speed and its power has dropped, this is the first sign of a rotor malfunction..

How to remove the rotor from the housing
To get the rotor out of the housing, it is necessary to separate the black and green housings as in the case of dismantling the stator..

We take out the rotor

Having disconnected the stator housing, take the gear housing (black) in your right hand, and the rotor in your left and pull in different directions until they are completely disconnected. The rotor is held in the gearbox by friction of helical gears.

And this is the rotor

Carefully inspect the rotor manifold. There should be no brush scratches on it. The collector lamellas must be clean.

Clean collector

To check the integrity of the collector, you must use a short circuit detector. It is easiest to make the chain ringing according to the schematic diagram of the Makita 2470,2450 puncher. By the way, you can make such a device yourself if you know how to communicate with a soldering iron..

Circuit short circuit probe

If you are convinced of the malfunction of the rotor, then you can install a new one, or you can try to restore the failed one..

How to make your own brushes?

The cheapest way is to pick up electric brushes from other models of power tools by sharpening them to the desired size with an ordinary file. This is economical, but they will last less than the original ones. Alternatively, you can adjust the carbon rod of the battery or other elements..

Various batteries

You need to take the battery and pull out the central carbon electrode from it. The electrode must be sharpened with needle files to the required size of the old electric brush. (This is informational information and is not essential for use)

It is worth noting that the quality of graphite directly affects the service life and sparking.

Homemade carbon rod brushes

After making sure that the brushes are worn out, select analogs.

How to remove the anchor from the Makita hammer drill

Today, many DIYers and professional craftsmen have a whole arsenal of power tools that help them cope with domestic and repair and construction tasks. Rotary hammers, jigsaws, angle grinders, drills – all of them greatly simplify and speed up work. However, it happens that the power tool breaks down. Do not rush and send it to the trash because of this. Due to intensive use, the parts wear out, and therefore the equipment cannot work in normal mode. If you know how to remove the bearing from the anchor of the power tool, you can extend the life of your “helper”. Timely replacement and lubrication of parts allows you to operate the device for a longer time.

The main task of a power tool motor is rotation. The anchor is that important part of the device that makes the working mechanism rotate. The service life of the part depends on the power and speed, as well as the activity of the equipment use. Bearings are needed to reduce friction while moving parts. They provide smooth rotation and improve the running mechanism of the power tool. If the bearings are monitored and lubricated in a timely manner, their service life increases several times..

How to disassemble a punch chuck?

Sometimes the foreman is faced with the need to disassemble the cartridge for various reasons: whether it is repair, tool cleaning, lubrication or replacement of certain parts. For proper disassembly of the punch cartridge, first of all, you need to know the manufacturer’s company, since the parsing process depends on this point..

Among the modern manufacturers of electric rock drills, the most popular are Bosh, Makita and Interskol. These brands have managed to establish themselves in the construction market as a manufacturer of quality products..

In principle, there is not much difference between the device of perforators from different companies, but there are small nuances that are quickly resolved as the cartridge is disassembled..

Consider how to disassemble a chuck from Bosh electric drills, since this brand is the most popular and purchased.

First, you need to move the plastic part and remove the rubber seal. Using a screwdriver, it is necessary to very carefully remove the ring that fixes the structure and the washer. There is another fixing ring under this part, which must be turned, and then pry off with a tool and remove.

Next is the SDS clamp, which includes three parts: washer, ball and spring. SDS must be disassembled strictly according to the rules: first of all, the ball gets, then the washer, and the last comes the spring. It is important to follow this sequence in order not to damage the internal structure..

Assembling the chuck is as easy and quick as disassembling. You just need to repeat the previous steps exactly the opposite – that is, from the last point to the first.

How to remove a cartridge from a punch?

First of all, you need to understand the type of chuck used inside your power tool. There are three of them: quick-clamping, cam and collet SDS.

Quick-clamping is additionally divided into subspecies: single-sleeve and double-sleeve. The easiest way to change a part is on the SDS collet version. In this case, you just need to turn the drill. In the cam and quick-release type, the part is fastened with a key, so you have to work here.

Once the type of cartridge used is determined, you can proceed to the next stage: it is necessary to study the mount, due to which it is held.

The drill is mounted either on a screw rod or on a spindle. As a rule, the parsing process takes place quite quickly and without problems, but there are cases of too tight fixation, which will take time and some additional tools to disassemble. In the first case, to remove the part, you will need to stock up on a hammer, wrench and screwdriver.

In order to remove the cartridge, you will need to perform the following steps:

• Reduce the fixation of the drill by lightly tapping the tip with a hammer;
• unscrew using a screwdriver;
• clamp the part in a vise or wrench, and then rotate the spindle.

Sustainable re-bolting: stud bolt removal technique

How does a hammer drill work from the inside?

Professional craftsmen recommend that you always have at least one replacement drill chuck in stock to play it safe, as you may need it at any time. They also advise using different drills for each type of construction work..

There are several types of chuck, however, the main ones are keyless and key. The first option is optimal for craftsmen who change drills several times during a workflow, the second is suitable for large parts. Not every newcomer to the repair business understands the need for several types of cartridges, however, they are very important..

The electric tool has different powers.

Models with a high performance need a strong attachment of the nozzles so that they do not fall out during operation. In this case, the SDS-max part is perfect, which assumes a deep fit and prevents the cartridge from flying out of the hammer..

Power tools with less power are designed for more precise and small construction work. For these models, fixation is not so important, the main thing is that the hammer drill can drill a small hole in the right place. In any case, it is necessary to study the drill device from the inside in order to better understand how exactly the part will be replaced..

Modern technology has greatly simplified the design of many electrical tools. Currently, the cartridges are secured using double guide wedges and double locking balls..

Some chucks have a difference in the number of guide parts, for example, SDS max has one more. Thanks to this device, the drills are fixed more reliably and firmly..

Progress has greatly simplified the fastening of the part. You just need to insert the required cartridge into the hole and press it until it clicks. The drill is firmly fixed. The drill is removed simply – you just need to press on one of the caps and remove the drill.

As a rule, many electric rock drills are equipped with additional functions that greatly facilitate the process of construction work. For example, some have an electronic or brush reversing system, the ability to regulate the number of revolutions, an anti-vibration system. Many companies also equip rock drills with a quick change drill system, an immobilizer, a function to prevent chuck from jamming, and special indicators that indicate the degree of wear of the chuck. All this contributes to a more comfortable work with an electric tool and allows you to speed up the process..

Punch chuck: how to remove, disassemble and replace?

• How to remove a cartridge from a punch?
• How does a hammer drill work from the inside?
• How to disassemble a punch chuck?
• How to insert a chuck on a hammer drill?

The reason for replacing the chuck with a drill can be both external and internal circumstances. It will not be difficult for professionals to disassemble, remove and replace the desired part, but beginners may have some difficulties with this task..

In this article, we will look at how to properly change the cartridge on the hammer drill..

How to insert a chuck on a hammer drill?

In order to insert the chuck into the hammer drill, you must do the following: screw the drill onto the tool (and it is important to screw it all the way to the end), then insert the screw into the socket and then tighten it to the very end using a screwdriver.

You will learn about why drills can fly out of the hammer drill chuck in the video below..