How to change a bandsaw blade

Some can last under six months, and some can last years! Some of the most important variables to consider are what you are cutting, the condition of the machine and blade, how long you are using the blade, and even how you are feeding the wood through your saw as well.

If the blade wanders and will not cut on your line, it is dull. If you feel you have to push hard against the blade to get it to cut, it is dull. This can lead to you getting injured. If you are pushing your work and the blade comes out of a cut your hand will move forward near or into the blade.

Most experienced woodworkers will recommend replacing a bent or kinked bandsaw blade. You could also try and use a pair of gas pliers to straighten out the blade. This could allow you to finish what you were working on until you can replace the blade if you don’t already have any replacement blades in the shop.

How to Sharpen a Bandsaw Blade. You should typically be able to get two to three sharpenings before you need to change your blade completely. If you‘re looking to sharpen your band saw blade, you have two options: manually sharpen the blade yourself or use a mechanical sharpening machine.

More resistance when making a cut.

You should feel little to no resistance when pushing through a cut with a sharp blade. If the blade feels like it needs more force than when it was new, or it seems to get bogged down at certain spots while cutting, it might be dull.

The number of teeth on the blade helps determine the speed, type and finish of the cut. Blades with fewer teeth cut faster, but those with more teeth create a finer finish. Gullets between the teeth remove chips from the work pieces.

Chipped teeth or rounded edges are sure signs that your blade needs to be replaced or sharpened. It is very important that the blade is sharpened as soon as visible saw blade deterioration occurs.

According to experts, a low-quality diamond blade can only last around 12 hours of non-stop cutting, while high-quality blades can cut materials up to 120 hours.

If cutting rebar when exposed, a diamond blade will make quick work of the cut, but it greatly reduces the life of the blade. This is because diamond blades “cut” by grinding the material as opposed to other blades that rip and tear.

Any handy homeowner looking to cut concrete needs one crucial tool: a diamond blade. While abrasive blades can cut concrete, they wear out quickly, potentially needing to be replaced multiple times in the course of one project.

If the blade core has worn out spots.

Nothing works better than regularly checking the blade for any damage. Sometimes they only need to be run through an abrasive material instead of quickly resorting to a replacement. If your blade is too hard for the material being cut, then it will certainly wear out easily.

Diamond blades usually cost between $15 and $75. They can last between 12 and 120 hours of continuous use, depending on the quality of the blade and material they’re used to cut.

That’s because a diamond blade cuts with the diamonds impregnated into its cutting segments. These diamonds wear down during cutting, despite being one of the hardest substances on earth. When these diamonds are worn out, then your diamond blade is worn out, and you’ll need to replace it [1].

Sharpening a diamond blade – diamond blade sharpening stone

A grinding wheel or a tool made of silicon carbine can work too, if you happen to have one at home. For example, fire bricks are usually made of 90% silicon carbide, and an obsidian can be used to freshen up the blade to prevent it from getting too dull.