How to Safely Replace a Power Hacksaw Blade

What You'll Need
Hexagonal tool
Replacement blade

Replacing a power hacksaw blade is not a complex task. Since blades often break and need replacing, their holding mechanism is pretty simple. Although there are multiple types of power hacksaws, like electric, pneumatic or air hacksaws, the holding mechanism is very similar, maybe even identical for all of them. Here’s what you need to do.

Step 1 – Finding a Proper Blade

First thing you need to do when dealing with a broken blade is to find a proper blade. Its length and thickness are two very important factors you should have in mind. A longer blade won’t provide the required power, whereas a shorter one won’t fit to your tasks and may even damage the machine. Thickness is also important because the holding mechanism consists of one or more dampers each side of the blade that press against it, so having a thicker blade or one that’s too thin means the dampers won’t fit properly. Also, a blade that’s too thin might break easily and need replacing again, so finding the right blade is a must. Go to a power tools store and tell them the model of your power hacksaw and they’ll provide you with a suitable blade.

Step 2 – Getting the Old Blade out

Usually the blade has a lengthened end that fits into a notch inside the hacksaw, and is fixed with one or two dampers each side. In order to get the blade out, remove the two dampers from each side with the hexagonal tool, and then carefully slide the blade out of its place. Be very careful when maneuvering the blade, because usually it’s very sharp, and serious injuries can occur if not handled with care. Be sure to deposit the broken blade away from the reach of children.

Step 3 – Putting the New Blade in Place

After successfully removing the old blade, it’s time to fit the new blade in. Carefully take the new blade and slide it until the lengthened end fits perfectly into the notch. Using the hexagonal tool, screw the dampers back into place. Before fixing the dampers very tightly, make sure you centered the blade, because if you don’t do so, its high speed movement might send it away flying and cause significant damage to the machine itself and serious injuries to the person operating the machine. You should now have a new blade on your hacksaw.

Remember that blades are very sharp objects, so adequate protective gear is highly recommended when working with them, especially broken ones. Be sure to wear proper protection for your hands, body and eyes when working with this kind of tool.