Hacksaws are one of the most common hand tools. Almost everyone has one, and if you do not have one, you must buy one. Hacksaws are inexpensive and very economical to use. But most of you never use it because the first time you tried to use it, things did not go well. You broke the blade of the hacksaw, the blade continued to fall from the handle or it got stuck in the room you wanted to cut. If you managed to cut the piece, it took forever and the cut ended up being twisted.
The main reasons that prevent most people from sawing metal with a hacksaw are the following:
You do not use a sharp blade
There is too much bending in the blade
The number of teeth is too small for the project
You put too much pressure on the saw
You don & # 39;
I will address each of these difficulties in this article.
Hacksaws and hacksaw blades are designed to cut metal (I will explain how to use it to cut wood and plastic). ) and most people find that cutting metal is very difficult and frustrating. The reason, most of the time, is that they do not really know how to use the hacksaw.
What is a hacksaw?
A hacksaw is a metal frame designed to hold hardened metal blade. The blade is usually 1/2 inch high and the majority of them are 12 inches long. The blade has a hole at each end that inserts into the hacksaw's pins. Hacksaws are designed to cut on the thrust stroke. The handle of a well-designed saw is angled so that you exert gentle pressure on the blade as you push it through the material you are cutting. Even though some so-called "experts" will tell you that you can place the blade in the other direction, a hacksaw does not work well if you have the blade upside down.
Do you need a hacksaw? ]
You can cut almost anything with a hacksaw. Although it was designed to cut metal, you can use it to cut plastic, wood, metal tubes, aluminum, copper and brass. It works great for cutting electrical tubes (ducts), BMX (flexible metal tubes), plastic water pipes (PVT and CVT) and even bolts and nuts. You can use it to cut a 2X4 at the pinch and with the porcelain tile of the right blade.
Installing the Hacksaw
Step 1. Determine which blade you will use to cut Material. Use a 32 t.p.i. blade for the duct, a blade of 18 teeth to cut a bolt or a plastic pipe and an 8 teeth for the wood. In practice, you want to have at least three teeth in contact with the material at all times. If you cut deeper than the depth of the blade, use a corrugated blade. The corrugated blade leaves a wider slot (kerf) that prevents it from sticking to the groove you cut.
You can use it to cut wood. It will cut much more slowly than a wood saw, but it works if you do not have anything else. Use a blade of 8 or 10 teeth and mark the cut line on the board both horizontally and vertically. Use the horizontal mark to make a first cut (groove) and the vertical mark to keep your cut right. Take your time and do not press too hard on the hacksaw.
Step 2. Insert the blade so that the teeth are pointing towards the front. If you do not see it, gently move your finger over the teeth of the blade.
You will feel the teeth "grab" on your finger. Place the blade so that it adheres when you push the saw. The holes in the blade go into the pins at the bottom of the frame. Many hacksaws are designed to take blades of different lengths. Therefore, if you have an adjustable frame, you may need to shorten it or lengthen it to fit your blade.
Teeth should try to "grab" your finger when you push it. If they do not feel sharp, the blade is blunt and needs to be replaced. The blades are inexpensive so do not be afraid to replace them.
Step 3. Tighten the thumbscrew until you can not turn it (hand tight). This tension on the blade should prevent the blade from tilting as you cut. Sometimes when I have problems with the falling blade, I will press it again a quarter turn with a pair of pliers.
Well, let's cut something.
I will use a metal. blowjob for this example. It is easy to cut and once you have gained a little experience of the hacksaw, cutting the metal will be a kid's game.
To actually use a hacksaw, you need a very tight job. I have a vise on a workbench that I usually use.
If you do not have a vise, screw a 2X4 on your workbench and hold the hose against the 2X4 with your left hand. If possible, use a vise or pliers to fix the metal you want to cut.
Step 1. To properly use a hacksaw, grasp the frame with both hands. (I am right handed and grab the handle with the right hand and use the left hand to hold the other end of the saw.) Hold the hacksaw so that the index of the right hand is directed towards the front to help guide the saw. When you push the blade (run forward), use your left hand to guide the saw so that it cuts vertically. DO NOT use your left hand to apply pressure, just use it to guide your cut. Use the most of the blade. If you apply pressure on the movement towards the front with your left hand, the teeth will usually hang too much and the saw will "hold on". Again, a hacksaw handle is tilted to allow you to properly press the blade.
Step 2. When you reach the end of the run, stop and pull the saw backward with your right hand. When you withdraw, do not apply pressure with your right hand. (It cuts only forward and exerting pressure on the return stroke will wear the blade prematurely). Many teachers will have you lift the saw when returning to avoid destroying the blade. Move your body forward and backward as you cut, pressing the race forward and lightening the run back.
Step 3. Repeat this operation until you see it all the way through the pipe. With a little practice, you will be able to cut about 1 shot per second. Do not hit faster than this, as this will create too much heat and cause premature blade wear.
Do not exert excessive pressure on the blade. You may need to break a blade or two before knowing how much pressure you can apply. Do not worry, they are cheap. Do not cut too fast, it could also break the blade. Always check that the blade is firmly fixed in its frame.
Reviews. Or do not buy it at Wally World
Believe it or not, I could tell you a lot more about the use of a hacksaw, but that's enough for that you cut properly. Buy a good quality hacksaw that I recommend on my website. Even the cheapest I recommend is of good quality and will last for years. With quality quality, it will not be long before you can use a good one.
DO NOT buy a cheap product at a local dollar store. Why? The handle of the hacksaw must be strong enough to keep the blade properly tensioned and the inexpensive blades will only give you years of frustration. Also purchase a hacksaw with the inclined handle like the Stanley 150565. Some hacksaws have a straight handle and are very difficult to use for beginners.
Blades are cheap, so buy a box in numbers of at least two "teeth" (32 teeth for metal duct and 18 teeth for solid steel, plastic pipe and general purpose.) But n & # Do not buy cheap blades Cheap blades are too fragile and you will end up breaking them a lot A good blade cuts with a hacksaw You have to change the blades as soon as they become dull. If a blade is blunt, put your finger on the blade, if it is still sharp, the teeth will try to get stuck with your finger.I prefer the blades of Milwaukee, because they will flex without breaking and will last for a very long time. cheaper blades, better buy two inexpensive hacksaws and keep different blades on each blade.The dull and worn blades take a lot of work to cut an item, so change it as often as you would with a knife or razor
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