Saws available by cutting edge geometry
If you take a closer look at jigsaws, you will notice that they all have different kinds of teeth setting and cutting edge geometry. The more bent the teeth are, the wider the cutting line will be, which leads to higher cutting speed, but at the cost of poorer cut quality. The type of setting determines not only the cleanness of the cut, but also what materials the jigsaw can be used for.
Features. Saws with the classic set have alternate teeth bent in different directions like a regular hand saw. This arrangement reduces saw blade heat during operation because the blade feels almost no friction in a relatively wide kerf. It is almost unrealistic to get a clean cut with such a saw, but the cutting speed is high.
Purpose. The saw blades with ground toothing and classic set are designed for cutting hard and soft wood as well as plastics and non-ferrous metals.
Milled with corrugated tooling.
How to Quickly Cut Metal With a Jigsaw. BOSCH GST 25M
Features. The teeth of this set do not change direction one after the other, but work in groups of teeth instead. Each tooth has a different degree of deflection from the central axis than its immediate neighbors. the working edge of the saw blade produces a wave pattern.
Designation. The purpose of wave milled saws is a clean cut not only in wood, but also in chipboard or plywood, as well as working with non-ferrous metals and plastics.
Sharpened with the Classic Set.
Special features. The teeth of such blades are bent to the sides and undergo the process of grinding. the cutting line of such blades is wide enough.
Purpose. Sanded toothed saw blades, classically set, are designed for a quick but relatively clean cut in wood and its derivatives such as chipboard, hardboard, fiberboard, etc.д.
With a tapered grinder without a grinder.
Features. The blades of such saws do not have a tooth pitch, but their segments are ground, which ensures a thin line of cut and an even cut.
Purpose. Make it possible to accurately cut wood, laminate, plastic materials.
General information about the tool
A jigsaw is a saw with a cutting blade that reciprocates. Depending on the design the tool performs from 200 to 3000 oscillations every minute, by which the metal workpiece is cut.
The jigsaw, unlike most saws (handheld, trimmer and others), is designed for shape cutting. over, it is difficult to get a straight line of cut, but a curved one. easily. However, there are products for cutting at right angles. They are equipped with special guides and cost a little more than their counterparts, while weighing down the design.
Experts divide jigsaws for metal into groups according to a number of parameters, among which:
According to the latter criterion, the tool is divided into two types:
The first allow you to hold the tool in one hand, which reduces the accuracy of the cut, but the scope of use expands. The latter need to be held with both hands, pre-fixing the workpiece. It is uncomfortable, but the precision of cutting the workpiece increases.
Type of handle allows to classify only manual models. This is not the case with electric jigsaws. Further. in detail about other types of cutting tools.
How to saw with a jigsaw smoothly? All about jigsaws and working with them
The technological operation of sawing or making a curved cut presupposes the formation of a mowing line corresponding to the set task. That means that the cut should be even with minimal tolerance for deviation.
- Ensuring tight adjacency of mating surfaces.
- Creation of minimal gaps.
- form a regular geometry of a construction out of processed parts.
- Attractive appearance of the saw blade and the workpiece as a whole.
Sawing with the saw table
The design of the table makes working with an electric jigsaw much easier, especially when sawing circular, oval or complex shaped elements. Such a table can be purchased or manufactured by oneself.
The tool is firmly fixed to the underside of the table top, with the blade upwards.
Switching on and off is done via buttons on the side of the table.
Here the operator does not move the tool, but the workpiece where sawing is performed.
Such machine allows better control of the workpiece and observance of the marking line. As with the jigsaw, you should avoid exerting too much force on the workpiece.
Why the jigsaw is crooked
In some cases, the craftsman may get a crooked cut. This kind of trouble is caused by:
Working with too thick materials is difficult to achieve a straight cut.
Ways to avoid problems
To get an acceptable result, it is worth having patience and working with the tool correctly. Avoid pushing it too hard and pushing it forward. This will only worsen the quality of the cut and cause chipping of the material. It is not unimportant to apply the scribing line to the workpiece.
Sawing metal boards, wooden tabletops and other products should be done with a device with a well-sharpened saw blade.
Different types of jigsaws
Hand jigsaws with an electric drive can be classified according to the type of power supply:
Industry offers more and hybrid jigsaws, that is, powered from both the battery and the network, but widespread such devices have not received.
- Electric jigsaws are powered from 220 (V) mains electricity through a live wire with a plug. Due to the power supply of the electric actuator from a remote source, it is possible to significantly reduce the size and weight of the device. That said, network models offer solid performance.
But the main advantage of jigsaws for 220 (V) is the affordable price.
Of course, mains-powered models have a number of drawbacks, some of which are considered critical under certain circumstances. The power cord limits the freedom of movement of the jigsaw significantly. The wire can get tangled and get in the way, which reduces safety and decreases the general work culture.
In addition, you cannot use a corded electric model at sites where there is no electrification. This problem can be solved by using a generator, but in this case, there are a number of related problems.
- Cordless jigsaws are completely self-contained pieces of equipment. The battery pack makes it possible to work anywhere and anytime with the jigsaw. Generally speaking, the power of cordless models is enough to effectively handle high-strength steel cutting.
Of course, the battery pack makes the metal jigsaw more massive and heavy. But the lack of a current-carrying cord does compensate for this drawback. On the downside, it is still possible to note a very high price of this type of jigsaws. A cordless jigsaw usually costs 2-3 times as much as its similar in power and functionality to its networked counterpart.
Standalone and portable jigsaws with battery are usually chosen when freedom of movement is important for the user. Jigsaws of this type are excellent for shape-cutting!
The BEST Jig Saw for the Money? Metal Cutting Made Easy!
information about jigsaws and saw blades.
Electric jigsaws specifications
Like other power tools, jigsaws differ in a number of parameters. Performance characteristics determine what loads the model is designed for, what workpieces can be processed, how productive it is.
Jigsaw power is the main parameter that defines the class of the tool. As a rule, jigsaws for domestic use have a power between 300 and 500 watts, jigsaws for professionals. up to 900 watts and more. The more powerful the electric motor, the more productive the tool. Jigsaw power rating indicates the maximum cutting depth, cutting speed, and continuous operating time. It is worth remembering that the more powerful the power tool, the heavier it weighs, the greater the strain on the operator’s hand. It is therefore important to choose a sensible balance when choosing a power tool.
Jigsaw stroke frequency
On this characteristic depends the cutting speed. the greater its range, the more materials you can cut. High speed is suitable for soft wood, medium speed for hardwood, plastic and soft metal like aluminium, low speed for steel. If you choose a jigsaw for working with wood only, a model with a maximum stroke rate up to 2500 strokes per minute is enough. For work with plastic and steel, it is better to choose a model with a stroke over 3000 strokes per minute. Jigsaws that operate in a wide speed range from 0 to 3100 stroke are the most versatile./min.
Depth of cut with the jigsaw
This determines how thick pieces of workpieces the jigsaw can handle. Low-powered utility models can handle wooden pieces up to 70mm thick, and steel up to 4mm thick. Professional jigsaws have a longer stroke, so they are able to cut more than 100mm of wood, up to 20mm of aluminum, up to 10mm of steel.
Of course, manufacturers give more characteristics as their task is to provide the buyer with exhaustive information about weight, size and other consumer properties of the tool. But these three parameters are the main ones when choosing. They are helpful for determining whether a jigsaw is suitable for your specific application.
Cutting wood and everything that is made of it is the main purpose of the jigsaw. That’s why most assortment of saw blades is made just for wood and is subdivided according to the type of work.
Certain construction work with wood does not require particular care, such as sawing timbers for battens or dismantling old window frames. Here it is more important the speed provided by the blades for fast cutting with characteristic signs:
Similar blades with coarse cutters are used for thick workpieces, but without setting, they are less deviated from the vertical. In principle, the thicker the saw, the better it holds perpendicularity.
Advice. A blade with an oblique tooth is better for cutting along the grain, and a straight one for cross-cutting.
An operation such as trimming furniture board or parquet requires a smooth and accurate cut. Similar tasks are performed with less productivity, but better quality, using blades for a clean cut, have:
Most saws cut on retracting, so the material is placed on the back side. To mark and cut from the face, you need a blade with a reverse tooth. It is not very convenient to work with them, in addition to maintaining the direction of the cut, you have to overcome the force of the pushing out of the tool.
Tip. Panels laminated on both sides can be cut almost cleanly with a special saw with two rows of teeth.
Sawing small radii with a wide blade is problematic. Circular saw blades have a beveled back side that makes it easier to turn, rounds go through without splintering and are different in appearance:
Cutting steel sheet using a jigsaw
In order for the sawing line to be even, the working surface must be as stable, rigid and strong as possible. When working at home, it can be an ordinary table with solid legs and a flat tabletop.
The board is secured to the surface by means of clamps fixed on both sides with moderate force. Position a plate to be sawn in such a way that the tool does not rest on the surface when working. To keep the saw pressure off the saw blade during cutting, you can put some weight on the protruding edge hanging from the surface with an attached weight.