Log splitter DIY drawings

Date: 11.10.2018, 15:47 / View: 53352

Sharpening the chainsaw chain is probably no more difficult than sharpening other cutting tools, but subject to the availability of special tools for sharpening it. Her tooth has a complex geometry. Two cutting edges, the side and the top, of which the second is beveled at a certain angle to the line of movement of the chain, make this operation difficult. Chainsaw Chain
Chainsaw Chain

The tooth of the chain planes wood like a plane, and the thickness of the chips is governed by the height of the stopper. Planing wood with a chainsaw tooth
Planing wood tooth chainsaw

Intensive sawing leads to a rapid dulling of the chain. Within one day, it may take several sharpening. The problem is aggravated by the fact that the tooth is quickly blunt when meeting the ground. It is enough to hook the soil one or two times with the tire, and the work can be stopped - the chips become shallow, and the saw stops diving into the wood. The sharp tooth of the chainsaw
Sharp tooth chainsaw Blunt tooth chainsaw
Blunt tooth chainsaw Tooth chainsaws after a collision with a ground and stone in it
Tooth chainsaw after a collision with the ground and stone in it

The earlier the blunt teeth are sharpened, the less material needs to be removed when sharpening, as a result - the service life of the saw chain is longer. To determine the time when you need to sharpen is quite simple. An important feature is the feed force. Correctly sharpened chain is drawn into the cut already with a slight pressure. If, on the contrary, the chainsaw is forced to sawing with an increased feed force, the teeth are blunt. A dull chain can also be recognized if, instead of large thick chips, only small chips fly out of the cut. Shavings from working with a sharp and blunt chain
Shavings from sharp and blunt chains

In this situation, the chainsaw must be sharpened urgently. Do not cut with a blunt or defective saw chain - the result is a strong tension in the body, a large cyclic load, poor cutting results. In addition, this means reduced performance, high fuel consumption and increased wear on all the chainsaw nodes. Parameters of the teeth of the chain The cutting link consists of: the base of the link (1), the blade of the tooth (2), the depth stop (3). The blade of the tooth has a vertically positioned end blade (4) and an upper blade (5) falling at an angle to the rear and located horizontally. Parts of the cutting link
Cutting parts

To achieve optimum cutting properties, certain angles are attached to the tooth blades. The back of the tooth, which falls at an angle backward, forms the posterior angle of the upper blade. This angle is needed for cutting the upper blade into the wood. The rear corner of the upper blade
Rear corner of the upper blade

The tooth blade tapering back forms the back angle of the end blade. This angle is needed for lateral cutting of chips. End angle of the end blade
End angle of the end blade

The edge of the end blade forms a rake angle with the sliding surface of the cutting link. The front corners of different types of chains vary from 60 to 85 °. Front corner
Rake angle

The rear corner of the upper blade indicates the slope of the upper blade back. The rear corner of the upper blade
Rear corner of the upper blade

This angle is measured relative to the cutting plane of the cutting link and, depending on the type saw chain, has a value from 50 ° to 60 °. The upper blade is the main blade and the rear corner of the upper blade is the most important angle. The rear angle of the upper blade is difficult to measure, its correct value is formed while observing other prescribed values.

The sharpening angle or plan angle is obtained by measuring from the upper cutting edge at right angles to the guide rail. Angle of sharpening (angle in plan)
Sharpening angle (angle in plan)

The sharpening angle can be changed, depending on the application. The main rule: the larger the sharpening angle, the higher the cutting performance when cutting non-frozen soft wood. Reducing the angle of sharpening when cutting frozen and / or hard wood contributes to a smoother saw and reduce vibration. However, you should avoid a sharpening angle of more than 35 ° and less than 25 ° (with the exception of chains for longitudinal cutting, in which this angle is 10 °).

The rake angle, the sharpening angle and the angle of the upper blade change when sharpening. These angles have a decisive influence on the cutting ability of the chain. Be sure to observe the prescribed values.

A depth limiter is located on each cutting link in front of the tooth blade. The difference in height between the upper edge of the depth gauge and the leading edge of the back of a tooth is defined as the distance of the depth gauge. Distance of the depth limiter
Depth stop distance

The depth of penetration of the upper blade into the wood (chip thickness) and, thus, the productivity depend on the distance of the depth limiter. The depth limiter distance is set depending on the chain pitch and type of performance. Normally, it should be 0.5-0.8 mm, usually 0.6 mm. High values ​​will result in increased tendency of the chainsaw to kickback, too much grip and chain vibrations. Low values ​​lead to a drop in performance. Since the distance of the depth limiter with each sharpening of the saw decreases due to the reduction of the upper edge of the tooth, the depth limiter also needs periodic fileing - after 5-10 sharpening of the chain. General rules for sharpening a chainsaw chain Since the inner contour of the tooth surface is close in shape to the circumference, and the metal of the chain is quite soft, the chain is sharpened with a round file of small diameter. Sharpening the chainsaw requires precise positioning of the file relative to the tooth to be sharpened. Its position should be such that the top edge of the file protrudes approximately 1/5 (20%) of the file diameter relative to the top edge of the tooth. Before sharpening the chainsaw chain, it is desirable to know its parameters, since the file diameter should be chosen depending on the chain pitch. It usually ranges from 4-5.5 mm. In addition, it is necessary that the file be positioned at an angle of 90 ° to the chain in a vertical plane and 30 ° or 10 ° (see. The parameters of the chain teeth) - in the horizontal. It is rather difficult to fulfill all these conditions, doing just with a file, therefore, when sharpening a saw, various devices are used to ensure the necessary sharpening parameters. Usually they are kits bundled with chainsaws, or purchased independently in any normal store selling chainsaws. File position when sharpening the chainsaw chain
File position when sharpening the chainsaw chain. Chain sharpening tools One of the common chain sharpening kits consists of a circular file installed in a special holder, a flat file for grinding the depth gauge, a template that provides the last operation, and a saw blade for cleaning saws from sawdust. Chainsaw sharpening kit
Set for sharpening chainsaws

On the holder with a round file there are lines that allow it to be correctly positioned relative to the chain. The holder is mounted on the sharpened tooth in accordance with the orientation lines. In this case, the plate itself rests on the upper edge of the tooth and the depth limiter, and the file is located under the cutting edge. Position devices for sharpening the saw tooth
The position of the device when sharpening a saw tooth

Using a holder ensures that the file fits to the tooth at the correct height. There are different holders for different steps of the saw chain. The right choice of holder in combination with the correct file diameter ensures that the file protrudes 1/5 of its diameter above the back of the tooth. Use only special files for sharpening saw chains.

Before sharpening the chainsaw chain, it is advisable to fasten the tire. When sharpening, it is necessary, keeping the position of the holder and pressing the file to the edge being sharpened, to make several (2-3) turning movements from oneself. No need to try to press the file too hard, the movement should be smooth and measured. Turn the file regularly to avoid one-sided wear. In the same way, all other teeth are sharpened. It is more convenient to first sharpen the teeth in one direction, then change the position and do the same with the teeth in another direction. Sharpening a tooth and grinding a depth limiter
Sharpening a tooth and grinding a depth limiter

When sharpening all the teeth, do the same number of movements with a file with the same pressure. This will give the same length of teeth. All cutting teeth must have the same length. The different length of the teeth is the cause of the uneven course of the chain and the formation of cracks in it. If the length of the teeth is not the same, all cutting teeth should be cut to the length of the shortest tooth.

After several sharpening of the cutting teeth, the depth stop is grinded. For this, a template is applied to it in such a way that the limiter falls into the slot, and a tip protrudes from the slot with a flat file.

Such kits, with different configurations, are sold in many shops selling tools, for example, various sets and individual files are sold (only buy better through the online store, because in a regular store of this network the price may be higher).

The principle of using a different set for sharpening chainsaw chains does not differ from the first, although its design is different. Chainsaw chain sharpening kit
Chainsaw chain sharpening kit Chainsaw chain sharpening template
Chainsaw Sharpening Template

A round file is also used for sharpening a cutting tooth, and a flat file for sharpening a depth stop. A special template provides sharpening parameters for both cutting teeth and limiters. In the first case, it is superimposed on the chain so that it falls into its slot. The file imposed on the template and placed under the cutting edge rests on the guide rollers. The direction of movement of the file should be parallel to the side edges of the template. Sharpening a chainsaw chain with a sharpening kit
Sharpening chainsaw chains with sharpening kit

When grinding the limiter, the template is applied so that the limiter falls into the slot, near which it says SOFT (for soft wood) or HARD (for hard wood). As in the case of the first device, grinding is performed by smooth smooth movements of the flat file from itself. The protruding part of the limiter to be ground
The protruding part of the limiter to be ground Grinding machines for chainsaw chains Not every chain can be properly sharpened with a file. If, during the work, it thoroughly plowed up sandy or gravel soil or it was not ground for so long that the cutting edge completely lost its shape, file sharpening would require too much effort and time. But then how to sharpen a chainsaw? In such cases, it is reasonable to use a machine for sharpening chainsaw chains. Machines are divided into manual (which, perhaps, it would be more correct to call devices) and electric, equipped with grinding wheels.

Stihl company produces two versions of manual machines - stationary FG 2 and mobile FG 1, installed directly on the tire. There are analogues of less well-known companies that are commensurate in price with the simpler devices described above, for example. Chainsaw sharpening chainsaws FG 1 (Stihl)
Chainsaw sharpener FG 1 (Stihl) Chainsaw FG 2 (Stihl) chain sharpener
The machine for sharpening chains chainsaw FG 2 (Stihl)

The working part of these devices structurally resembles an archery saw, into which, instead of the saw blade, a round long file is inserted. FG 1 and FG 2 not only sharpen the chains, but also rule them, adjusting the length of the upper edge of all the teeth to the same size - along the smallest tooth, which is taken to be the control one. A rather complicated configuration mechanism allows you to set all the necessary parameters. Sharpening is done with 2-3 movements, after which they proceed to the next tooth, retaining for it all the settings that were made for the control tooth. This ensures the same sharpening parameters for all teeth. When grinding the limiter, the round file changes to a flat one.

Simple and convenient to use electric sharpener for chainsaw chains. It has a configuration system that allows you to set the chain at the right angle and bring the disc exactly to the edge to be sharpened. There are machines that automatically clamp the vice when lowering the disc on the chain. Sharpening machine for chainsaw chains
Chainsaw sharpening machine Chainsaw sharpening machine
Sharpening machine for chainsaw chains When using the content of this site, you need to put active links to this site, visible by users and search robots. Literature

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