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Hacksaws February 28 , 2017

Hacksaws are one of the most common hand tools. Nearly everyone owns one, and if you don't have one, you need to buy one. Hacksaws are inexpensive and very economical to use. But most of you never use it because the one time you tried to use it things didn't go well. You broke the hacksaw blade, the blade kept falling out of the handle, or it kept getting stuck in the piece you were trying to cut. If you did manage to get the piece cut, it took forever and the cut ended up crooked.

 

I will cover each of these difficulties as you and I go through this article.

 

Hacksaws and hacksaw blades are designed to cut metal (I will tell you how to use it to cut wood and plastic) and most people find cutting metal very difficult and frustrating. The reason, most of the time, is that they don't really know how to use the metal hacksaw.

 

What is a Hacksaw? Junior Hacksaw

 

A hacksaw is a metal frame designed to hold a tempered metal blade. The blade is typically 1/2 inch high and the majority of them are 12 inches long. The blade has a hole on each end that fits into pins on the hacksaw. Hacksaws are designed to cut on the push stroke. The handle (grip) on a properly designed saw is angled just right so you put a little pressure on the blade when you push it through the material you are cutting. Even though some so-called "experts" will tell you that you can put the blade in the other way a hacksaw does not work well if you have the blade in backwards.

 

Do you need a Hacksaw? Mini 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 tubing, aluminum, copper, and brass. It works very well to cut electrical tubing (conduit), BMX (flexible metal tubing), plastic water pipe, (PVT & CVT) and even nuts and bolts. You can use it to cut a 2X4 in a pinch and with the right blade porcelain tile.

 

Setting up the Hacksaw to Cut.

 

Step 1. Determine which blade you will use to cut the material. Use a 32 t.p.i. blade for conduit, an 18 tooth blade for cutting off a bolt or plastic pipe and an 8 tooth for wood. In practice you want at least three teeth in contact with the material at any time. If you are cutting deeper than the depth of the blade use a blade that has wavy teeth. The wavy blade leaves a wider slot (kerf) that keeps the blade from sticking in the groove you are cutting. Heavy duty hacksaw

 

You can use it to cut wood. It will cut a lot slower than a wood saw, but it works if you don't have anything else. Use a 8 or 10 tooth blade and mark the cut line on the board both horizontally and vertically. Use the horizontal mark to make you initial cut (groove) and the vertical mark to keep your cut straight. Take your time and don't put a lot of pressure on the hacksaw.

 

Step 2. Insert the blade so that the teeth are pointing forward. If you can't see this, rub your finger gently over the teeth of the blade.

 

You will feel the teeth "grip" your finger. Put the blade so it grips when you push the saw. The holes of the blade go into the pins on the bottom of the frame. Many hacksaws are designed to take different length blades so if you have an adjustable frame you may have to shorten or lengthen the frame to fit your blade.

 

The teeth should try to "grab" your finger when pushed. If they don't feel sharp, the blade is dull and should be replaced. Blades are inexpensive so don't be afraid to replace it.

 

Step 3. Tighten the thumbscrew until you can't turn it with your hand (Hand tight).This amount of tension on the blade should keep the blade from bowing as you cut. Sometimes when I am have problems with the blade falling off, I will tighten it another 1/4 turn with a pliers.

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