How to lengthen the output shaft of an angle grinder

  • threaded rod thinner than the diameter of the shaft by 5-10 mm;
  • A nail or wire with a diameter of 2-3 mm;
  • nut for the stud;
  • epoxy glue or threadlocker.

Drill a hole in the motor shaft for the stud. To make it straight without a lathe, you need to reverse the polarity of the power supply to the motor to make it rotate in the opposite direction. After that, by clamping a thin drill bit in a holder or clamp and starting the motor, it is necessary to drill a hole at least 30 mm deep in the center of the shaft. If it is not the drill bit that will rotate, but the shaft, there will be almost no misalignment during drilling.

Next you need to enlarge the hole to the diameter you need for the threading of the stud. After drilling, you can put the power wires back in. After blocking the shaft, the internal thread must be cut.

Screw a stud into the shaft as far as it will go. Then screw it out one turn and mark it for drilling. The stud is unscrewed back and drilled with a drill bit with a diameter of 1-3 mm, depending on its thickness.

On the shaft itself, a cross notch must be made in the center. Its width should be the same as the hole in the stud.

The stud is then screwed back in. You can apply threadlocker or epoxy adhesive to it.

You need to set the hole in it against the kerf, and secure it with a piece of wire or nail.

A stopper will prevent the stud from unscrewing back. To prevent it from falling out, it is necessary to clamp it with a nut, preferably also planted on a threadlocker.

The stud is then cut to the right length and used to fit the right tooling.

Some general helpful tips for organizing the repair of the angle grinder

Before you begin repairing the angle grinder, consider a few helpful tips:

  • Before you start to disassemble the angle grinder, carefully read its description, the scheme of assembly and sequence of operations.
  • Always follow the sequence of technological operations.
  • Strictly observe safety precautions.

The most frequent reason of angle grinder breakage is a wire break near the handle. First you need to check the presence of voltage on the button, this is done with an ordinary voltage tester. Then check the button itself for proper operation.

on diagnosing and repairing the electrical part of an angle grinder.

How to remove a needle bearing or a broken plain bearing rim

Different bearings are used in the gears of angle grinders. They are subjected to great stress and are the cause of malfunctions.

You can tell if the bearing is ruined by an increase in clearance on the spindle shaft. Disassemble the gear housing and remove the big gear shaft and you will see the needle bearing.

Angle Grinders 101 | How to Use an Angle Grinder

Not all grinders use a needle bearing. In the same lathes in which it is installed, it can be disassembled in several ways.

With the broken part of the bearing out, the inner ring can be taken out with a machine tap. Engage a machine tap of suitable diameter in the chuck of an electric screwdriver and try to screw it into the bearing cage until the tap rests against the bottom of the housing. Continue to slowly screw the tap into the cage. It will lift the cage along the thread.

See also  Why do the brushes on the angle grinder spark strongly?

The second method is that the remaining rim of the destroyed needle bearing can be removed with a special bolt and a retaining ring.

How to remove the helical gears of the gearbox of an angle grinder

Repair of the angle grinder gearbox begins with the dismantling of helical gears. It is the gears that are the main cause of angular grinder gearbox failures. In lathes most often it is necessary to change the small drive pinion, fixed on the rotor shaft.

On the rotor shaft, the helical gear can be attached in two ways:

  • The pinion is fixed with a keyed joint and clamped with a nut.
  • Gear is fastened by screwing. Both right and left-hand threads are used.

The large spiral bevel drive pinion is also mounted on the spindle shaft in two ways:

In addition to replacing gears in bolt-type lathes, it is often necessary to replace one or the other bearing. And there are at least three of them in the design of the angle grinder.

How to lengthen an electric motor shaft without a lathe

In this review the author shows how to lengthen the motor shaft, if there is no possibility to perform this work on the lathe. Information useful for all do-it-yourselfers.

As a “test subject” is used electric motor from a washing machine, one of the most affordable motors today.

First of all, the master resolders the wires, so that the motor shaft rotates in the opposite direction. Then turn the motor on, and using a drill 5 mm in diameter drill a hole in the center of the shaft (depth. not less than 30 mm).

Gradually drill the hole to 8.5 mm in diameter. Next you need to cut a thread for M10 bolt.

Screw in the bolt up to the stop, and then unscrew it one turn back. To do this, you need to fix the other end of the shaft.

Basic steps

In the next step we mark and drill a through hole in the bolt M10 (or stud). On the end of the shaft make two grooves opposite each other with a depth of about 1.5-2 mm.

lengthen, shaft, angle, grinder

Then we shorten the bolt to the proper length and get a stud, which is an extension of the motor shaft.

Screw it into the shaft (you can do it just like that, you can use epoxy glue). You can even use threadlocker.

For details on how to lengthen the shaft of the electric motor with your own hands, you can see in the video on our website.

How to lengthen a short motor shaft without welding or turning it

On the reverse side of most electric motors, the shaft is cut off, but there are situations where it is necessary. In this case it can be lengthened. This is done in an affordable way that doesn’t involve welding or using a lathe. Everything can be done at home, and the result will be more than acceptable with minimal runout.

Destruction of the disc

Before you unscrew the nut on the angle grinder, you will have to crush the disk completely. If it is already ruined, you can break it up by hand. Solid discs can be sawed with a hacksaw or metal blade. From the abrasive wheel, the inner metal ring and the pieces that are not mechanically attacked should be left behind. Then you need to clamp in a vise the metal profile or any unnecessary plate with a thickness less than or equal to the thickness of the disk (but no more). Then turn on the angle grinder and grind the rest of the abrasive to the bushing. After that, the flange can be easily unscrewed with a universal wrench for an angle grinder.

You can take care in advance that the tool is not jammed in the angle grinder:

The clamping nut for angle grinders is included. And the most radical solution to free the jammed disc. to saw it and put a new one. These fasteners are available at all power tool stores.

What is the bore diameter of an angle grinder?

For cutting metal in the home often use an angle grinder (angle grinder), which is usually called an angle grinder. And the consumables for grinders are cutting discs.

lengthen, shaft, angle, grinder

Depending on the material to be machined, there are the following types of angle grinder discs:

Let’s look at the marking, the main dimensions, the main manufacturers, as well as compare popular brands on the price-quality ratio.

Other interesting questions and answers

How many points did you get on your USE and what university did you get into??

So it’s time for my sad story!

See also  Stand for 230 angle grinder with their own hands

I took the USE in 2012, studied very hard and did not cheat. By the necessary subjects I got: 86 on history, 80 on social studies and 72 on Russian language. It was in Russian that I messed up because normally I did not make more than 4 mistakes in all tests and mock exams but in the real exam I made as many as 8! In the end, I got 238 points. In my “high” school it was the highest score, and even with a gap, but when I entered the university it was far from the highest.

Read also: The marking of a residual current and differential circuit breaker

In general, I decided to enter the Philosophy Faculty at the UU (Yekaterinburg), and I got the last state-funded place. But then a girl wrote to me in my personal message asking if I still had time to apply?”. I told her I’d make it, and that solved everything. She had a score of 239 and took my place. So I was one point short. In the third year, picked up the mind, still transferred to the budget place is the fourth course.

How to unscrew a disk nut on the angle grinder (angle grinder), if it jammed?

I can not unscrew the nut on the angle grinder (angle grinder).

How to unscrew a tightened flange nut on an angle grinder (angle grinder)?

On the angle grinder (angle grinder) disc broke and the nut got stuck. how to unscrew it?

I will tell you the easiest and most convenient method of unscrewing such a nut. “jammed”. This method will not require you to have anything additional (where to get a vice, working in the basement, somewhere outdoors, or a gas wrench, a chisel, etc.).д.). Yes, and a chisel is not the best way out, as I’ve seen so many grinders with “shabby” nuts, with broken locks. They are scary to look at. Heating is the right direction (has been suggested). but the wrong method of execution. To break the drive to the base of the nut I think it will not be difficult, then find a wooden block, or something like that, turn on the angle grinder and nut as a mode block. As a rule, a minute is enough for good heating, the nut is unscrewed at “one time”. One inconvenience, it can “puff up”.

State three signs by which the phase of an eclipse of the moon can be distinguished from its normal phases.

What are the phases of the Moon New MoonThe period between a new moon and a full moon during which the Moon’s illumination increases from 0% to 100% and the angular distance of the Moon from the Sun changes from 0° to 180°: first phase-the period between the new moon and the first quarter-the state when half of the moon is illuminated; the degree of illumination increases-second phase-the period between the first quarter and the full moon Full moonThe period between the full moon and the new moon during which the illumination of the moon decreases from 100% to 0% and the angular distance of the moon from the sun changes from 180° to 360°: Third phase-the period between the full moon and the third quarter Third quarter-the state in which half of the moon is illuminated; the degree of illumination decreases Fourth phase-the period between the third quarter and the new moon

Some general useful tips for angle grinder repair

Before you begin to repair the angle grinder, consider a few useful tips:

  • Before you start to disassemble the angle grinder, carefully read its description, the scheme of assembly and sequence of operations.
  • Be sure to follow the sequence of technological operations.
  • Strictly obey the safety instructions.

The most common cause of angle grinder failure is a wire break near the handle. First you need to check the presence of voltage on the button, this is done with an ordinary voltage tester. Then check the button itself for operability.

on diagnosing and repairing the electrical part of the angle grinder.

How to remove the needle bearing or a destroyed plain bearing rim

Different bearings are used in the gearboxes of bucking drills. They are subjected to high loads and cause malfunctions.

See also  Cutting out of a large angle grinder with their own hands

Bearing degradation is determined by an increase in play of the spindle shaft. By disassembling the gear housing and removing the large pinion shaft, you will see a needle bearing.

Not all grinders use a needle roller bearing. In the same lathes, in which it is installed, its disassembly can be carried out in several ways.

By pulling out the destroyed part of the bearing, the inner rim can be removed using a machine tapping tool. Push a machine tap of suitable diameter into the chuck of an electric screwdriver and try to screw it into the bearing rim until the tap hits the bottom of the housing. Continue slowly screwing the tap into the cage. It will lift the rim up on the threads.

The second method is that the remaining rim of the destroyed needle bearing can be removed with a special bolt and a retaining ring.

How to remove the helical gears of the angle grinder gearbox

Repair of the angle grinder gearbox begins with the dismantling of helical gears. It is the gears that become the main cause of failure of the angle grinder gearbox. The small drive pinion attached to the rotor shaft is the most common way to change a bolt and pinion in a bolt and pinion machine.

The helical gear can be attached to the rotor shaft in two ways:

  • Gear is fixed by a keyed joint and secured by a nut.
  • Gear is fastened by means of a threaded joint. Both right and left-hand threads are used.

The large driven helical gear is also attached to the spindle shaft in two ways:

In addition to replacing the gears in boltcutters often need to replace a particular bearing. And there are at least three of them in the construction of the angle grinder. https://youtu.be/7madFa-Zkq8

Conversion of a chainsaw into an angle grinder

Sometimes it is necessary to cut a pipe or profiled sheeting in a place without electricity. For this purpose, an angle grinder is used from a chainsaw, which can easily be converted using a purchased attachment.

To install this device on a chainsaw is necessary:

  • Remove the bar and chain;
  • free the tank from oil and remove the clutch drum;
  • mount the attachment pulley on the drive shaft of the drive sprocket;
  • fit the safety guard and the belt drive;
  • put on the cutting disk and the machine is ready for use.

The main advantage of the design is that it can be used in places where there is no electricity. When working with such a machine it is necessary to exercise extreme caution, because the chainsaw has a higher torque than a standard angle grinder. In this case there is an increased risk that the blade will be destroyed.

Retrofitting an electric screwdriver

If you don’t have a drill or chain saw handy and need to cut materials, you can make an angle grinder out of an electric screwdriver. The algorithm of its modernization is almost the same as in the manufacture of an angle grinder from a drill. The main element of the design will be the purchased nozzle. adapter or spindle of the faulty angle grinder.

The advantages of such an electric tool can include quick transformation of the mechanism and the possibility of use away from the power grid. Homemade can be used in cramped conditions, where a standard angle grinder is not suitable because of its large size.

The main disadvantages of the homemade device can be called:

  • low battery life (when using a cordless electric electric screwdriver);
  • low speed of rotation of the cutting disc. about 700 revolutions per minute;
  • Insufficient power of electrical device.

Such a mechanism can only be used as a low-power angle grinder. With its help, you can cut metal with a thickness of no more than 1.5 mm or an angle 2020. It can cut rebar with a diameter of less than 8 mm. It is not possible to use an electric screwdriver as a complete cutting tool.

| Denial of responsibility | Contacts |RSS