power hacksawCredit: photo pin

Many people assume that because the hacksaw is powered electronically it is strong enough to carry out any cutting job. The truth is that there are different blade sizes for the saw. The sizes differ according to the number of teeth per inch on the cutter e.g. 24, 32 and 14 are some common cutter sizes. These different blades are designed for different jobs. For example blades with more teeth per inch are used for cutting hard thin metals while those with fewer teeth are used to cut softer metals.

Using the wrong cutter for a job will result in the saw overcompensating for the blade. You are therefore likely to injure yourself while cutting or damage the tool in the long run. The cutter will also become dull if used improperly.

You should therefore ensure that you change cutters appropriately as follows:

  1. Make sure that you have turned the saw off and unplugged it from the mains before you attempt to change the shank. Changing a cutter on a hacksaw that is plugged to a power source could result in serious injury.

  2. Loosen the wing nuts on the rear and front ends of the assembly of the hacksaw. Use your hands to loosen the nuts. Do not remove the nuts completely from the assembly. Simply loosen them enough to slide the shank out of the blade frame.

  3. Place the new blade in the frame. Ensure that the teeth of the new cutter are facing away from the handle of the cutter. Locate the pins and hook the new blade onto the hacksaw by the holes on the shank.

  4. Re-tighten the wing nuts to secure the blade into the frame.

  5. Have your personal protective equipment (eye goggles and gloves) on before you plug the equipment into a power supply. Turn on the hacksaw and use it to make some practice cuts. This will help you test the blade tension.

  6. Watch the cutter and take note of bending and bowing.

  7. If the tension is incorrect then the blade will keep bending and bowing while making a cut. Turn the hacksaw off and unplug it. Re-tighten the wing nuts. Plug the saw in and repeat the whole testing process.

  8. Repeat no. 7 above until the tension on the cutter is correct.

It is important to ensure that you have the right tension on the cutter so as to prevent injuries to yourself as well as damage to your power hacksaw.