The jigsaw - basic equipment in every workshop

The jigsaw - basic equipment in every workshop: equipment

jigsaws belong to every basic equipment of a workshop. With them, contours can be cut just as we long straight lines. For this, however, should be paid to the quality. Cheap jigsaws tend to run under load, so that hardly any cuts are possible despite leadership.

The particular advantage of a jigsaw light, however, in the one-sided tensioned saw blade, with which also Cut out cutouts and above all exact corners to let. All you need is a pre-drilled hole the size of the saw blade.

With a jigsaw, almost all materials can be processed and Extremely long saw blades even make it possible to shorten thick sheets or small trees. The power of many saws is absolutely sufficient for this and the range of products is enormous.

Interesting facts about the history of the jigsaw

Woodworking tools have been around for a long time, however, the invention of the jig saw took time and is thanks to the Swiss Albert Kaufmann. Today, Bosch is mostly regarded as the inventor and originator of the practical tool, but this is only partially true.

Albert Kaufmann was an employee of Scintilla AG and had his brilliant idea while looking at the sewing machine of his wife. A saw blade that moves up and down with an electric drive. Scintilla AG discontinued the patent and produced the first jigsaws with the designation "Lesto jigsaw" for the home improvement. Only ten years later, Scintilla AG was taken over by Bosch. The real inventor is therefore not Bosch, but the Scintilla AG, which now belongs to Robert Bosch GmbH.

How the jigsaw works

The jigsaw - basic equipment in every workshop: workshop

Transformation of the rotary motion into a linear movement

The function of an internal combustion engine and the conversion of the linear movement of the piston into a rotary motion is common to almost everyone. However, the movement conversion becomes even clearer in a steam locomotive, since here the lifting movement is clearly visible on the wheels.

The linearly moving piston drives a connecting rod, which is movably connected to a wheel. The reciprocating motion of the connecting rod causes the wheel to rotate and thus converts the type of movement. The same thing happens in a sewing machine or jigsaw. The rotational movement of the motor is converted by a connecting rod attached thereto in a rectilinear motion. The result is the lifting movement of the jigsaw.

At least that describes the function of the first models. Today jigsaws have significantly more possibilities and are therefore often referred to as a pendulum jigsaw. The features of a jigsaw can be described in the next paragraph.

Pendulum lift and other equipment of a jigsaw

The initial simple stroke movement of the jigsaw or the jigsaw blade has a decisive disadvantage. A saw blade cuts only in one direction - The sheet is pulled back, it rubs with the back of the tooth on the material to be separated. On the one hand, the teeth wear faster, on the other hand also leads to a special heat development, which benefits neither the saw blade nor the material.

The jigsaw - basic equipment in every workshop: workshop

Adjustable pendulum stroke

If a hand saw is used, nobody will lift the saw blade off the material when moving backwards. However, pressure is applied to the blades only during the forward movement. In theory, this could be handled with an electric saw, but with a stroke rate of sometimes more than 3000 min-1, this is difficult to achieve. Therefore, the jigsaw became the actual hub added a pendulum motion, This ensures that the saw blade is pressed in the cutting direction against the material and lifts it in the backward movement of this. With well-equipped jigsaws, the pendulum movement can be adjusted in several stages. Without a pendulum stroke, the cut surface becomes very clean and the saw blade can easily be contoured. The larger the pendulum motion is set, the greater the progress of work, but under which the cut quality can suffer.

Like drills and cordless screwdrivers, many jigsaws also have a so-called trigger switch. This makes it possible with a little flair to change the speed of the motor and thus the lifting speed of the saw blade. This option is particularly important when sawing different materials with the saw. But sometimes it's hard to keep the exact speed during the sawing processSo that jigsaws with a speed preset in intensive use have a special advantage.

The harder the material to be cut, The slower the stroke movement (cutting speed) should be and the lower the pendulum movement must be set.

The jigsaw - basic equipment in every workshop: basic

SDS quick-change recording

They call themselves SDS recording, quick release hanger or own other manufacturer's own designations - meant in all cases a tool-free saw blade change, which already belongs to a standard equipment today. Here, the saw blade is clamped by a lock or a spring mechanism and only needs to be unlocked for tool removal. The advantage here is not only easier handling and the time savings when changing the saw blade, the saw blade is also accurately fit and kept straight, which was hardly possible with older clamping methods by means of clamping screws.

The tool-free saw blade change However, in many cases requires special saw blade shots, so not always all saw blades of all manufacturers are used. Another disadvantage may sometimes be the implementation of the quick release device. Especially cheap manufacturers tend to make this quite easy, so that penetrating saw dust soon leads to a difficult function or even jamming of the clamping device. Here you should rely on experience and reviews.

The jigsaw - basic equipment in every workshop: basic

Bosch CutControl for better cutting control

Laser pointers and other laser display devices can be implemented with current technology particularly small, energy-efficient and cost-effective. It is therefore understandable that many tool manufacturers rely on this technology and equip their tools with a laser cutting indicator. Especially with a jigsaw you should not expect too much, which is not necessarily due to the quality of the laser display. The jigsaw makes it possible to saw curves and curves and can be moved in very small radii. Without stop or guide rail, it is therefore very difficult to perform exactly straight cuts. Smallest changes in attitude already affect the cutting process. A laser cut display barely anticipates or even compensates for these changes. Although it can specify the cutting direction in combination, inaccuracies can not be avoided. However, a laser section display is advantageous in the coarse separation of large plates. Since the mark of the laser is already visible in front of the saw, it is quite easy to set the cutting direction and to aim at a desired point of intersection.

In addition to the laser guide, there are also other devices for better cuttinglike the Bosch CutControl, which is also suitable for miter cuts with several markings.

The Suction or chip blowing function is particularly important with a jigsaw. In many cases, the jigsaw is used for cutting contours or cutouts. Long straight cuts are rarely used, so a guide rail or rip fence is rarely used. However, sawing after scribing requires that work surface always be free of chips and so the cutting process can be constantly adapted to the crack. Although the combination with a vacuum cleaner makes sense in many cases, the usually very rigid suction hose complicates the exact guidance of the jigsaw. More advantageously, here can be a blowing function that blows the chips directly in front of the saw blade of the workpiece surface and thus away from the tear. For extensive sawing, if possible, suction is of course preferable.

The jigsaw - basic equipment in every workshop: equipment

Bosch CutControl for better cutting control

It is true rather rare that the feature is used but almost all jigsaws allow miter cuts or bevel cuts. Rarely, as the required depth of cut increases significantly and it is only possible to make really accurate miter cuts with a very good jigsaw and a very sharp and stable saw blade. In many cases, the cut runs, which is difficult to correct in the course of the cut. For strips and rough cuts, the function is suitable, but long bevel cuts should be avoided.

For angle adjustment jigsaws have in almost all cases adjustable base plate with snap-in function, the cuts in 15, 30 and 45° allows. More locking functions are rarely used. The adjustment is usually done by loosening one or two screws, so that the base plate can be easily moved to release the locking function, and then can be rotated for angular adjustment. By tightening the screw, the base plate is secured again. Of course it makes sense to use a jigsaw sometimes for miter cuts. As a basic requirement, it should not be seen.

Shank forms from different manufacturers

The jigsaw - basic equipment in every workshop: jigsaw

It is common in general that Manufacturers like to cook their own soup, to tie their customers to their own brand when using tools. Sometimes tools are also developed at different places at the same time, resulting in different tool holders. A clear example of this are the blade shanks, which are mainly divided into two different shapes - in T-shank and U-shank.

The jigsaw - basic equipment in every workshop: basic

However, the following table also shows that some manufacturers have used or used both variants. Meanwhile, the majority relies on the T-shank or makes it possible that both shank forms can be used. A good example where companies do not just work against each other.

At the same time, the majority of the T-shank variant offers a larger selection of suitable saw blades, so it makes sense when buying a jigsaw On this variant or the possibility to use both forms should be set.

U-shankBlack + Decker, Kress, Stayer, Skil, Ryobi, Power Base
T-shaftAEG, Atlas Copco, Bosch, Black + Decker, DeWalt, Elu, Festool, Flex, Hitachi, Kress, Mafell, Makita, Metabo, Protool,

Jigsaw with handle or knob handle?

Anyone looking for an answer here will endless discussions and opinions who will probably never agree. Both variants have found their place in manual and home improvement and advantages and disadvantages. Which one decides is ultimately up to each one and the intended use. Therefore, both are presented here:

Jig saw with bow handle

The jigsaw - basic equipment in every workshop: workshop

Jig saw with bow handle

She is the classic and therefore a very common variant, which for many simply represents the basic form of a jigsaw. Therefore, it is mainly to be found in the home improvement hardware store. Almost everyone knows her from Grandpa's workshop and anyone who grew up with this form will probably stick to it.

The handle is, as the name implies, as a bracket above the saw, causing them higher than a saw with knob handle is. Their advantage lies in a comfortable holding position, if one is clearly higher than the sawing point. For example, bent over the workplace. The power switch is easy to use and also the cutting speed can be varied during the cutting process. The bow-type hacksaw is therefore suitable for "quick use", as it occurs when sawing strips or simple cutting tasks. Even metals can be sawn well due to the easily adaptable cutting speed.

The relatively tall design and above all Of course, the high grip position makes precise guidance difficult. Quite easily, a bow-shaped saw can be tilted sideways and there are no right-angled cuts. Also, the contour sawing will be somewhat disadvantaged by the large distance between the handle and saw blade.

Jigsaw with knob handle

The jigsaw - basic equipment in every workshop: every

Jigsaw with knob handle

Anyone who frequently visits companies or inspects the tools of many craftsmen will very often see jigsaws with a knob handle. Where the knob in the sense is rarely really pronounced as a handle. Rather, he takes on the mechanics to convert the rotary motion into a vertical lifting movement. To hold the knob handle is only used when sawing with both hands. With one hand, the saw is held on the rounded base body, resulting in a very low holding position to the workpiece. This enables safe guiding and a tilting of the saw is hardly possible. The missing bracket also reduces the space required for transport. The rounded design allows the saw to be kept upside down and down the workpiece. This holding position makes sense when sawing materials with a sensitive surface. With a bow-shaped saw this cutting position is hardly possible.

Directly under the housing of the grip area a jigsaw with knob handle is the engine. For this to be well covered, the housing must be kept as small as possible. For this reason, and from the non-predetermined stop position jigsaws with Knaufgriff have no typical Gasgebe switch. They must be switched on with a possible speed specification already before the cut. An immediate standstill when releasing the saw is therefore also not given (possible via safety switch). The jigsaw with knob handle is therefore more suitable for longer sawing work. Frequent switching on and off, as it is necessary when sawing narrow strips or small contours, is rather cumbersome.

The right saw blade for a clean cut

A good cut result This is primarily determined by a good tool, which is divided into the model used for the jigsaw, as well as the saw blade used.

If the jigsaw is unstable, the clamped saw blade does not align automatically or if the base plate is crooked, the best saw blade will not work - the saw cuts will be crooked and it will be difficult to guide the saw exactly along the scribe. Work with a guide rail can even become impossible, as the saw blade runs and builds up a tension between the cutting guide and the position of the saw blade in the cut. Especially with a jigsaw quality differences are therefore quickly felt and all too cheap bargains turn out to be a wrong shopping.

The jigsaw - basic equipment in every workshop: workshop

Saw blades for curved cuts, aluminum, steel and wood

The same applies of course to the saw blades used, with this quality differences rather noticeable in the service life. Who rarely saws plastic, does not have to resort to the most expensive manufacturer, here are quite favorable saw blades. On the other hand, it is crucial to use the right saw blades adapted to the material. Here is the selection enormous and every home improvement should have at least a small selection of different saw blades. Some important ones are presented in the picture (from left):

  • Saw blade for curved cuts: For curved cuts, the cutting direction of the saw blade must be easy to change, it must therefore have some play in the saw cut and must not be too wide. For this purpose, curve sheets are designed very narrow and have a significant setting (teeth are alternately bent outward). The significant offset creates a cut that is wider than the saw blade itself. This can thus be easily rotated in the saw cut and allows the sawing of narrow radii. The narrow saw blade makes it easier.
  • Saw blade for aluminum: Aluminum tends to bond very quickly during mechanical processing, which builds up enormous friction and ensures increased heat development. Therefore, an aluminum saw blade between the teeth must have enough space for chips and provide the saw blade on average by a significant reduction in space.
  • Saw blade for metal: Metals are stronger and harder than other materials and always place a special burden on the jigsaw. Therefore, it is important to keep this burden as low as possible.This is made possible by particularly small teeth, which additionally ensure that the mostly "flowing" chips (long chips without chip breakage) are kept short.
  • Saw blade for wood: The illustrated saw blade is a so-called precession sheet. Instead of set teeth, they are arranged alternately. The generated cut is no wider than the saw blade itself, which ensures a very straight cutting process. The alternately and inwardly ground teeth ensure a clean cutting edge and good chip removal. As a special feature, the lower end of the saw blade is specially shaped and allows a soulful immersion in wood.

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