What Grease To Lubricate The Gearbox Angle Grinder

Checking the correct lubrication of the gearbox angle grinder

Control of the amount of lubricant stuffed into the gearbox is carried out by trial switching on the assembled angle grinder for a short time at idle mode.

What Grease To Lubricate The Gearbox Angle Grinder

If the gearbox begins to warm up, traces of grease leakage appear from the oil seals and gaskets, then the conclusion is clear. You have shifted the grease. Open the gear case and remove excess grease. Any excess grease will be deposited on the gear housing covers. An insufficient amount of lubricant in the gearbox is determined by the increased noise of the gearbox.

During prolonged operation of the angle grinder, the lubricant in the gearbox is distributed on the walls of the case and loses its properties from external influences.

Having opened the gearbox cover, carefully inspect the condition of the lubricant, the tooth profile of the gears. If you can, check the contact patch of the gears.

The presence of particles of dry or dried grease in the area of ​​the gearbox or on the housing indicates that the time to change the lubricant has come.

The procedure for applying grease to the gearbox angle grinder

The new grease is thoroughly mixed before application and applied in a thin layer. The bearings are lubricated by packing. If the grease is in a plastic tube, then the neck of the tube is pressed against the side bearing cage and squeezed out until it flows out of the back.

Removing old grease

It will be nice if the old grease is dry and not difficult to remove. In extreme cases, it may be necessary to collect pieces of the composition that have scattered around the body, but if the product has retained its condition, then you will have to prepare kerosene or gasoline solution. After moistening a napkin or rag, you should carefully select the entire volume of old grease from the groove. Then repeat the procedure until the surface is completely clean. If grease was used for the gearbox of an angle grinder with a low threshold for thermal endurance, then a hot hair dryer can also be used. It will melt the lubricant to a fluid state. Then it remains only to rinse the gearbox and dry to apply a new composition.

Gearbox grease angle grinder

The grease for the gearbox of the angle grinder differs from the grease for the bearings in the main feature. increased adhesion. It should firmly adhere to the gearbox teeth when it rotates a lot.

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In general, the lubrication process of the gearbox in angle grinders occurs due to a fine spray of lubricant and its suspensions. Replacing the electric motor in the lawn mower. The gearbox operates as if in oil mist. The device of an electric motor in lawn mowers. Therefore, the lubrication requirements for gearboxes are slightly different.

In addition to increased adhesion, gear lubricants must be highly heat resistant and not melt at elevated temperatures.

Russian lubricant manufacturers have learned to produce high-quality lubricants suitable for any tool.

Lubricants have been developed for reducers of grinders, perforators, drills.

Nanotech Metal Plack Electra products are especially popular. Dismantling the electric motor of the lawn mower. The range of lubricants produced by this company allows you to select the appropriate lubricant for each unit

The procedure for applying grease to the gearbox angle grinder

The new grease is thoroughly mixed before application and applied in a thin layer. The device of the electric motor of the chigo lawn mower. The bearings are lubricated by packing. If the grease is in a plastic tube, then the neck of the tube is pressed against the side bearing cage and squeezed out until it flows out of the back.

When to change the lubricant in an angle grinder

The frequency of changing the lubricant depends on how often and under what load the tool is used. As a rule, this interval is about a year. In the case of intensive use with frequent overheating, the replacement frequency is reduced to six months, sometimes more often.

After removing the cover, you can see two bevel helical gears: a large and a small gear. The small gear is anchored and drives the large gear. The large one, in turn, is seated on a secondary shaft, to which a cutting or grinding disc is attached.

How to properly remove old grease in an angle grinder

The disassembled angle grinder gearbox must be well cleaned of old lubricant. It no longer performs its functions, plus solid particles have already accumulated in it, resulting from wear of moving parts. Mixing with new, old lubricant also significantly degrades its performance. Therefore, the gearbox and gears must be thoroughly cleaned.

Removing old grease from the gearbox

Remove old grease with a rag, paper towel, or just a rag. The removed parts can also be washed in gasoline or thinner. The washed parts must be thoroughly dried before assembly. Residual solvent or gasoline will mix with the new grease and change its consistency, which again will worsen its performance.

Correct grease filling process in angle grinders

After the choice of lubricant for the angle grinder is made, proceed directly to the maintenance of the tool. The correct maintenance process for an angle grinder consists of several steps. First you need to open the gearbox, then remove the old lubricant, apply a new one, check the correct application. Removing the old grease is necessary for the reason that mixing with new grease will not let it work properly and the entire maintenance procedure will not bring any result.

Correct packing of grease into the angle grinder

Characteristics and features of greases for grinders

When servicing any hand tool with moving parts, a lubricant is used that has the following characteristics and features:

  • It should not contain solid particles that can cause chipping of the moving parts of the mechanism.
  • The temperature at which the lubricant becomes liquid must be over 120 degrees.
  • The oil should not absorb moisture, should form a strong film that protects parts from corrosion.
  • And also, most importantly, the oil must be of such a viscosity so that it has the ability to stay on moving parts.
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The consistency or viscosity of greases is classified according to the NLGI (National Lubricating Grease Institute), and in certain cases it is necessary to use an oil of a certain thickness. The viscosity of the oil is selected depending on the speed of the gearbox, the higher it is, the more liquid the oil should be. So, depending on the tool, the viscosity is selected:

  • Drills, hammer drills, jigsaws, where the gearbox has a low rotation speed. NLGI-2 grease which is soft.
  • Lightweight rotary hammers and impact drills. NLGI-1 grade, very soft in consistency.
  • Angle grinder, circular saws, lawn mowers. NLGI-0 grade, semi-liquid in consistency.
  • Heavy drills, jackhammers. Grade NLGI-00, liquid in consistency.

Gearbox grease angle grinder

The guarantee of a long life of any hand tool consists in its correct periodic maintenance. Of course, you can give it to special service centers for maintenance and diagnostics, but, as the saying goes, "If you want to do well, do it yourself." Therefore, it is worth figuring out how to independently service such a popular tool among home craftsmen as an angle grinder or an angle grinder, in common people.

The movable parts of the angle grinder are most susceptible to wear. These are the bearings of the armature, gears, as well as the gears themselves, which are in the gearbox. The lubricant (or lubricant) put in by the manufacturer ages over time, its properties are lost, all this leads to greater wear of the gears in the gearbox and, as a consequence, to increased vibration and the appearance of extraneous noise during operation. Periodic maintenance and lubricant replacement in the angle grinder gearbox must be carried out at least once a year.

The procedure for applying grease to the gearbox angle grinder

Before applying new grease, it must be thoroughly mixed and made sure that there are no lumps or foreign objects in it. Apply a thin layer of lubricant to the gears, making sure that it completely covers the teeth. It is more convenient to fill the grease inside the bearings with a syringe. Then grease intended for the angle grinder is hammered into the gear housing. This is necessary for the reason that during operation it can fly off the gears and with a small amount of it, the gears will run "dry".

Gearbox lubrication stage

The gearbox needs to be filled with such a volume of grease that it completely covers the gears.

The sufficiency of lubrication for the angle grinder gearbox is checked by switching on the angle grinder for a short time. If, within 3-5 minutes of operation, the node temperature has increased and lubricant is leaking out, part of its volume must be removed. To do this, the gearbox is disassembled again, the excess is removed with a rag or rag.

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When checking, the opposite situation can be observed, when a noise appears when the angle grinder is turned on. This means that there is not enough lubricant and must be added.

When using an angle grinder, a periodic check of the adequacy of lubrication of the gear elements, the quality of the available lubricant is required.

When to change the lubricant in your angle grinder

The timing of the next grease change depends on the load and the intensity of use of the angle grinder. Usually it is equal to 12 months. With daily operation, an angle grinder with frequent overheating, the frequency of change is significantly reduced, at least to six months.

To make sure it is necessary to add a new amount of grease, the gearbox must be disassembled by unscrewing the screws on its cover. Inside is a pair of helical gears. The small one is placed on the anchor and is used to drive the large one located on the secondary shaft. A grinding or cutting disc is attached to this shaft.

During operation, the lubricant, when the gearbox moves, scatters along the walls of the housing, drying out over time and forming large lumps. The material used for a long time overheats, becomes liquid and flows out of the housing. Therefore, its volume in the gearbox decreases. If there is only a thin layer of lubricant on the gears, add lubricant.

Old grease removal stage

Removing used grease is the first step in gearbox maintenance. It is necessary to remove the old layer for several reasons:

  • The spent lubricant is not able to perform its functions;
  • It contains small particles formed during the wear of the rubbing elements;
  • Old grease will mix with new grease, because of this, the unit will not work properly, replacement will not bring any results.

Removal of waste is carried out using disposable paper towels, rags or a piece of tissue at hand. The removed parts of the gearbox should be thoroughly washed in thinner or gasoline, and dried before installation. Residues from cleaning materials can also mix with the new grease and change its consistency, resulting in poor performance.

How to properly lubricate an angle grinder. How much grease is required to replace

Therefore, it is better to first put in a little more material than required, and make sure that the lubricant is evenly distributed after the gears of the reducer are activated. The generally accepted norm is filling with lubricant about 40% of the volume of the gearbox.

What, how and when to lubricate the angle grinder

Lubricant for the gearbox angle grinder: service life, main stages of replacement. Application technology, recommended amount. Selection criteria and options, self-made lubricant.

In angle grinders (angle grinder), commonly called angle grinders, the main load falls on the gear reducer changing the rotation axis. Care for it is required throughout the entire period of operation, since the mechanism needs to reduce friction between its interacting parts, timely maintenance. The use of lubricant for the gearbox of the angle grinder allows not only to minimize the destructive frictional effect, but also helps to cool the tool.