How to Insert a Canvas into a Hacksaw
»How to install
Metal cutting is a laborious task, requiring serious patience, and requiring good tools.
One of the most common tools is a hacksaw for metal. Basically, the type of hacksaw is about the same; the blade replacement mechanism is different.
Two fastenings of the web are common, this is a threaded clamp, the web is fixed and tensioned with a special nut with a wing.
Another type of attachment is a linkage. Hacksaw blade for metal in this case is removed and installed with the participation of a small lever.
In the latter case, according to the manufacturers, the removal and installation of the web is faster. But the cost of such a hacksaw is much more expensive.
It is somehow difficult to imagine a person who would work without breaking away with a hacksaw all day, and the speed of changing the blade would be very important for him.
Therefore, the choice of the mechanism for fixing the hacksaw for metal depends solely on your desire, no more. Well, from the fullness of the wallet, too.
There are plenty of hacksaw blades to this day. The choice is primarily between domestic and foreign manufacturers.
Domestic canvases do not differ in quality, they quickly blunt, teeth fall out. But their cost is five, and sometimes fifteen times lower than foreign.
Metal sheets as red-hot and bimetal are also distinguished. The latter are more flexible, less likely to break, but also more expensive than red-hot ones.
Hacksaw blades differ in the number of teeth, they come with 18, 24 and 32 teeth.
To cut a harder material, you need to take a blade with a large number of teeth, and vice versa.
If you take a sheet of metal with a small number of teeth for cutting solid material, then sawing will be much more difficult.
It is necessary to install the blade in a hacksaw for metal correctly, the teeth should be directed in the opposite direction from the working one.
Only in this case, less work will be spent on working with a hacksaw and metal cutting will be easier and faster.
How to correctly and quickly saw with a hacksaw for metal?
To be honest, I don’t know any special secrets, but there are some nuances that should be observed.
About 30 years ago, when it wasn’t particularly about fortunes and angle grinders that my father heard all the work with metal, it was an ordinary hacksaw for metal. And a hand drill.
Firstly, I would advise you to choose a hacksaw, as in the second photo. This option is more convenient to work with. It’s just more convenient to hold it in your hands and the handle will not slip in your hand.
When installing the blade, pay attention to the correct positioning of the teeth. As shown in the photo, they should go away from the cutter. When cutting, you need to apply force when the saw comes from itself. Returning the saw back, you need to slightly raise the handle and relieve pressure on the saw itself. So the teeth will remain in working condition longer.
It is also worth paying attention to the tension of the blade when installing it in the saw. If the blade is slightly stretched or too tight, then with the slightest oscillation of the saw, it simply breaks.
Well, so that the blade does not get too hot, a couple of drops of oil can be dripped into the cut area.
Well, do not forget that the metal that is cut can simply be broken. That is, sometimes it is enough to saw off half, for example, a pipe or corner, and simply break the rest of it, by bending to one and the other side.
I would also like to draw attention to the fact that the part that is supposed to be cut is desirable (if possible) to be firmly fixed, for example, in a vice.
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There are no secrets. It is necessary to remember several important points and the metal will dissipate like butter on a knife.
You need to choose a saw with a comfortable handle and durable. We choose a canvas not from cheap, but with a spray on the teeth of a durable composition. Placed the blade in the saw so that the prongs of the blade were facing away from you.
When performing a split, you need to actively use force when moving the saw away from you and simply carry out the movement away from you without load. Try to perform a cut with the position of the blade with the maximum contact area of the teeth of the blade with the surface of the object that needs to be sawn or sawed. As for the split of the pipe, it is enough to file the pipe to half and a little more, as it can break clearly under your little effort. Much depends on the thickness of the pipe and its age.
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As many colleagues have already noted, when performing work with a hacksaw for metal when cutting (sawing), it is necessary to pay attention to the following points:
- strong and with a convenient handle frame saw;
- high-quality and appropriate steps for a particular metal (depending on the viscosity and hardness of the metal) hacksaw blades;
- the direction of the teeth is set by yourself;
- hand movements should be smooth and with a wide amplitude.
As for the nuances, I can say that hacksaw blades are a material with high hardness and brittleness and are afraid of overheating. Therefore, make permanent stops at work and the saw will serve you for a long time.
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The secret of your acquaintance is probably not in the way of working with the tool, but in the tool itself. Handling a hacksaw for metal is taught back in school (many made hammers, corners, etc.), so there are no special secrets: put the canvas correctly and keep it flat when you saw it. But in my practice, there were special canvases for metal (I don’t remember exactly from where: either from a fur saw, or from some other machine, but not the point.), Which easily cut pipes in an apartment and other metal objects that are easier it was cut with a hacksaw, than to rotate an angle grinder for the sake of this business.
Video: How to Insert a Canvas into a Hacksaw
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I can offer several recommendations that will speed up the sawing of metal with a hacksaw:
- Use a hacksaw with a sturdy frame made of composite materials.
- for work, it is better to buy canvases bimetallic, with hardened teeth.
- for metals of different hardness, select a blade with the appropriate number of teeth:
for soft metals, the number of teeth should be minimal. 16-18pcs / inch
for hard metals. maximum (32 teeth per 25mm).
- it is more rational to use new blades for cutting softer and more viscous metals (aluminum, brass, bronze, copper.), and used. for solid (steel, cast iron.)
- if the blade is broken, it is necessary to clean the cut from the fragments of the blade that may have remained there and only after that continue to work with a new blade.
By the way, if only one or a couple of teeth breaks down, the blade can be saved from further destruction if done on an emery (grind) in this place an arc (notch) with rounded edges.
- not always a high pace of work means fast cutting of metal. There is a certain dependence of the number of reciprocating movements on the hardness of the metal.
The harder the metal, the less intensive it is to work, otherwise the canvas will overheat and will quickly sit down.
The position of the hacksaw, arms, body and legs is clearly demonstrated by this figure.
To learn how to quickly saw with a hacksaw for metal, you need to understand the following!
The first one. the hacksaw is sawing only in the forward direction.
The second one. so that the hacksaw cuts metal, it is necessary to apply uniform force when feeding the hacksaw forward and completely weaken it when pulling back.
The third. the movements of the hands should be as confident as possible, uniform, as flat as possible (without swaying to the sides, blockages to the sides and forward, without twisting and jerking).
Fourth. it is the need to lubricate the hacksaw blade with machine oil on both sides, before sawing, and with significant cuts and applying grease to the blade as it develops.
Fifth. it is necessary to water the incision periodically so that it does not overheat and does not overheat the hacksaw blade, because of which hardening can be released and the blade will simply be erased.
Sixth. the metal that you are going to saw certainly matters, because not every metal can be easily sawed with a hacksaw, but there are ones that cannot be cut at all, it’s advisable to use a diamond cutting tool.
So these are the nuances. I hope to stop on the choice and installation of the canvas is not necessary, and in the previous answers it is already more or less described.
Hacksaw for metal. This is a hand tool that is used for cutting profile metal and pipes. The simplest hacksaw for metal consists of a machine tool and a hacksaw blade. The machine, in turn, consists of a frame into which, on the one hand, a handle is inserted that has a device for fixing the web, and on the other hand, a device for fixing and adjusting the web tension. The tensioning device, on the one hand, has a groove for inserting and fixing the web, and on the other hand, a screw with a ram which is used to tension the web.
The hacksaw blades for metal differ from each other in width, long, thickness, distance between the teeth and their height. The use of a particular blade depends on the thickness, hardness and shape of the material to be cut. Manufacturers of paintings made sure that you could pick up a canvas just for the material that you need to cut, whether it be aluminum, copper, bronze or even plastic. The dimensions of the blade, namely the length, width, dimensions of the teeth and the grade of steel, can be found on the hacksaw blade purchased.
How to set the blade in a hacksaw for metal?
As shown in the first picture of the article: the teeth are down (if the blade is one-sided) and the teeth are directed forward from the handle. When you saw, you apply pressure down and forward. the hacksaw teeth should be directed in the same way, down and forward. To install, loosen the tension screw, remove the old canvas from the pins, put on a new one and tighten it so that the canvas rings like a string from the click of a fingernail. The main thing here is not to overdo it and not break the canvas. Empirically, you will find the optimum tension.
The tension is made using a ram on the adjusting device, that is, spinning the ram you will pull the canvas. So when pulling a hacksaw blade you need to find a middle ground. Also, make sure that the blade is installed evenly, without distortions, as the distortion will result in uneven cuts during cutting.
How to cut?
Since you were interested in the question of installing the blade, then the advice on how to use a hacksaw for metal would not hurt. Grasp with one hand (right, if you are right-handed or left, if left-handed) by the hacksaw handle, with the other. by the vertical edge of the hacksaw arc opposite to the handle. Place the blade on the cut line. Guide the blade exactly in the direction of the cut line. Make the angle of the hacksaw small. The canvas should almost lie on the part, usually at an angle of 30-45 degrees. So there will be less vibration, noise and a smoother cut line. Cutting across the material, with an angle of 90 degrees, is only necessary in emergency cases, for example, when turning the cut line. The smoother you need the cut line, the smaller the angle.
The first movements need to be done with little effort so that the blade crashes into the material and does not slip away from the cutting line. Making smooth movements, strictly progressively, press the hacksaw to the part when moving forward and weaken the pressure when returning to its original state. When the canvas clings to the material. You can work at full strength.
The range of motion is maximum, from the edge of the blade to the edge, without hitting the part with an arc of a hacksaw. No need to stagnate. you will quickly erase the canvas in one area and have to throw it away, because it is impossible to use a flawed canvas. Keep the hacksaw arc straight, do not let it bow in different directions. The direction of cutting corresponds to the plane of the hacksaw’s arc, therefore, chatter here is contraindicated. In addition, the blade breaks easily with sharp jerking jigsaws to the side. The properties of the web material are such that it holds the longitudinal tensile force very well, but is very brittle to bend.
Cut with a hacksaw along a curved line.
A hacksaw for metal is also valuable in that it allows you to cut in almost any curved line. In order to cut along the arc without stopping the translational movements of the hacksaw, align it perpendicular to the end face of the part material (i.e., the angle of inclination is 90 degrees) and gradually smoothly turn the hacksaw arc so that the blade follows the intended line. Yes, a cut line is always a must-note. with a pencil, marker, scratch with a nail. The main thing is to see it when you work. Turning the canvas should be done as gently and smoothly as possible, otherwise it will break; turns. this is extreme for a hacksaw blade.
If you need to make a sharp turn, say, by 90 degrees, you will have to practically stomp on the spot, continuing to saw and smoothly turn the hacksaw arc, periodically stepping back so as not to go far from the turning point, using the side of the material to turn the canvas that external for the part.
To cut the inner corner, you first need to drill a straight line with a thin drill slightly longer than the width of the blade, thread the blade into this groove and cut further with a hacksaw. In general, practice will show how this is done. Nothing complicated here.
The figure below shows another way to use a hacksaw for metal. For this method, you need to reinstall the canvas by rotating it 90 degrees.
Hacksaw blades for metal