How to unscrew a disc on an angle grinder – without a key

Without the right key, are you having trouble removing a disc from your angle grinder? You’re not by yourself. This dilemma arises frequently for both professionals and do-it-yourselfers, usually in the middle of a project. The good news is that this problem can be resolved in a number of useful ways with everyday resources and skills.

Although angle grinders are strong and adaptable instruments, the discs can occasionally get obstinately stuck. This is particularly true if the disc has overheated or if the tool has been used for a long time. Thankfully, you can effectively and safely remove the disc without the manufacturer’s key if you have a little knowledge of how to do it.

We’ll look at a number of strategies in this guide to assist you in turning off the disc and returning to your work. We’ll go over everything you need to know, from using commonplace objects to specialized techniques. So whether you’re a weekend warrior or a seasoned pro, keep reading to learn how to easily solve this common issue.

Method Description
Use a Wrench Find a suitable wrench that can fit into the holes of the disc"s locking flange. Gently turn counterclockwise to loosen.
Use a Wooden Block Place a wooden block between the disc and the guard. Slowly rotate the disc counterclockwise to loosen it.
Use a Hammer and Screwdriver Insert the screwdriver into one of the holes in the locking flange. Tap the handle of the screwdriver with a hammer in a counterclockwise direction to loosen the disc.
Heat the Nut Carefully apply heat to the nut with a heat gun. This can expand the metal and make it easier to unscrew.
Hand Method If the disc isn"t too tight, you might be able to unscrew it by hand. Wear gloves for better grip and safety.

How to change an angle grinder disc in a normal situation

Cutting wheels require frequent replacement. Should the device encounter difficulties while operating, it is necessary to replace the disk.

Crucial! Disconnecting the device from the power source is necessary when replacing a disk or performing any other type of repair. It is a fundamental safety rule.

Step-by-step algorithm

If nothing goes wrong during normal operation, changing the disk is not a problem. The instructions provided by any tool manufacturer include a description of the entire working algorithm.

First, use the included locking nut to fasten the circle to the spindle head. With the grinder is an open-end wrench.

So, here’s how to take out an angle grinder disc:

  1. The first step is to fix the spindle. For this work, you should use a special lock located on the back of the device. When you press the button, the gearbox is secured, thus preventing possible movement.
  2. The worker needs to insert the key into the hole. Then, while holding the latch, turn the key counterclockwise, thereby moving the nut, and then tighten and unscrew it by hand.
  3. The next step is to remove the retainer, the damaged circle and the lower flange. After removing the parts, you can notice several layers of substances burnt during operation. The dirt should be removed with a steel brush.
  4. After cleaning, the lower flange is returned to its original position. In this case, it is imperative to align the spindle grooves with the visible grooves of the flange. A gasket is installed on top.
  5. The next step is to install the disk on the device and close it with a gasket.
  6. Finally, you need to tighten the upper lock with your hands, holding the cutting disk. At the same time, you need to clamp the spindle lock and tighten the flange.

Crucial! Not too tight of a fastening is preferred as this reduces the possibility of unscrewing the circle and experiencing oscillation from side to side.

Why the problem of disk jamming in the grinder occurs

Jamming happens very seldom if the work is done with a device that is using the weak start function. However, at fast speeds, the following image appears:

  • The angular speed of rotation of the disk drops with resistance, as a result of which it begins to slow down.
  • But in this case, the engine still operates at its speed, forcefully dragging the gearbox and spindle forward in a circle.
  • Because of this, the disk is pressed in, tightening along the applied thread of the spindle head.

Crucial! Even the most well-known company’s grinders have the potential to malfunction due to disc biting.

The problem’s occurrence is influenced by multiple factors:

  • setting the circle too large;
  • excessive power of an angle grinder, for example, from Bosch or Interskol;
  • massiveness of the rotor;
  • increase in resistance.

The disc on the grinder is jammed: what to do and what to do

If a device starts to bite, it can be challenging to replace a component, particularly if the drive or the cutting element are broken. An angle grinder can be used in a variety of ways, all of which need a thorough explanation.

How to replace a disc by rotating it in the opposite direction

Advantages of the approach:

  • can be used without a key;
  • allowed to use with a broken spindle lock.

Many who are new to the situation assume that if the angle grinder stopper breaks, there is no way to fix it. However, this is untrue.

Rotating the abrasive wheel from side to side is required. You must strike the wheel’s cutting edge a few times after covering your hands with thick gloves. A total of two to three powerful blows will be sufficient to remove the nut.

Repair using an open-end wrench and a socket head

You will need to adjust the parts—an open-end wrench for 16 and a socket head for 23.5 mm—in order to remedy the breakdown in this manner. Both the key and the four head protrusions must be ground down to a size of 4 mm.

Then, position the head on the device’s flange and the key beneath the disk, turning it in the opposite direction of the circle’s movement. This technique works well for replacing the circle.

Heat

One common and efficient method of removing a disc from a device is heating. It is crucial to heat the locking nut before using it. The flange will unscrew considerably more easily as a result.

Take note! The angle grinder’s components could be harmed during the heating process, so it must be done carefully and gradually.

Using a regular large nail

You’ll need a 100 mm nail for work. To make it easier to insert into the standard holes on the clamping flange, its ends must be bent into a U shape. Next, you have to take off the head and point, put the nail in, and turn the lock. Even though the technique is thought to be straightforward, not all models can use it and it does require some skill.

Using a gas wrench

One of the best methods for freeing a stuck disk is to use a gas wrench. However, it should be remembered that there is a chance of breaking the clamping nut or the spindle lock when removing snags.

Hammer and drill to help

The instrument needs to be operated at medium power in jackhammer mode. A 6 milliliter drill works well as a nozzle. It must be rested against the edge of the clamping nut hole, the spindle must be carefully adjusted, and it must then be moved out of position with a brief movement.

Crucial! This technique can even get rid of really bad equipment biting.

Nut tapping method

Technique-wise, the procedure is similar to the one mentioned above, but it is preferable to use a chisel.

Tap along the edges of the clamp holes after securing the spindle head. You can then use your hands to unscrew it and replace it with the one that is needed by sliding the lock.

Crucial! The tool is vulnerable to breakage using this method. You must aim and strike the chisel with great care.

Cutting wheel destruction

Breaking the component part into its component parts would be another way. You are able to rip the disk off. To make the metal ring fully visible, you must locate a plate and grind off portions of the circle.

Sawing the clamping nut is an additional extreme technique. It ought to be applied only in cases where no other course of action has yielded the intended outcome.

Crucial! Whichever method is selected, the master can effortlessly take the disk out of the grinder as long as all requirements are satisfied.

Measures to eliminate jamming

The following are the best ways to prevent jamming:

  • placing cardboard or plastic washers between the angle grinder disk, flange and spindle head;
  • correct installation of the abrasive wheel;
  • welding the nut on the clamping flange;
  • control of the tightening force.

Without a key, removing an angle grinder disc can be difficult, but with the right technique, it’s not insurmountable. You can complete the task safely, effectively, and without endangering your equipment by utilizing basic tools and techniques.

With pliers, this is one of the simplest methods. Turn the disc nut counterclockwise while holding it firmly. If it’s too tight, you may need to gently tap the pliers with a hammer in order to loosen the nut.

In the absence of pliers, a flat-head screwdriver may be helpful. Gently turn the nut by inserting the screwdriver between the disc and the guard. To prevent slipping and getting hurt, this technique calls for patience and cautious handling.

A universal wrench could be a worthwhile purchase for individuals who use angle grinders on a regular basis. This tool offers a flexible solution for different grinders because it is made to fit nuts of different sizes.

Either way, don’t forget to unplug the angle grinder before trying to take the disc out. In order to avoid mishaps and guarantee a seamless procedure, safety ought to be your primary concern.

Despite appearances, unscrewing a disc on an angle grinder without a key is not as difficult as you might think. This article will walk you through a number of useful techniques for safely and effectively removing the disc, like using pliers or a screwdriver, which are common household tools. You can quickly return to your project without having to waste time looking for a specialized tool by following these simple steps.

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