Tool-wiseTommys Tips
- How do I extend the life of my Hole Saw?
-
You must always run your hole saw at the correct speed.
This is dependant on the diameter of the hole saw and on the material you wish to cut.
The various speeds can be found on the side of the box and if you are unsure or the material is not listed then please feel free to ask. For example
A 20mm Morse Bi Metal hole saw cutting wood or mild steel should be run at a speed of 425rpm
However a 20mm Morse Bi Metal hole saw cutting stainless steel should be run at a speed of 210rpm.
Yes you need to go slower through Stainless Steel.
Keeping the saw cool will also greatly increase the life of the hole saw - please see our further tip - How to keep my Morse Hole Saw Cool?
- How do I keep my Morse Hole Saw Cool?
-
Keeping your hole saw cool with improve its life greatly.
There are many ways to do this one of the most popluar is to use a shop bought lubricant however a cheaper way to keep your hole saw cool when cutting through metal is to get a household sponge and cut it to the size of the holse saw. Soak the sponge in water and place inside the holesaw. As you use the holesaw the water will trickle down the sides of the holesaw helping to clear chips and disperse heat and so improving the life of the saw.
- How to use a jigsaw?
-
The jigsaw works along the same principles as a sewing machine.
The cutting speed of the upwards/downwards movements can be adjusted in degrees, or can be regulated electronically.
The cutting speed ranges from 200 to 3000 cuts per minute. (determined by machine and manufacturer)
When using harder materials, for example metals, lower cutting speeds are used. With softer materials like woods, higher cutting speeds are more appropriate.
The clamped sawing blade is designed to cut during the upwards movement. This is aided by the so-called pendulum cut.
The pendulum cut ensures that the blade is pressed against the material with extra force during the upward movement. In this way, it is possible to saw faster, while using the same amount of energy.
During the upward movement the blade is automatically drawn slightly from the material.
These movements together produce the pendulum motion (Pendulum Cut.)
