Some things to consider when using bandsaws...!
All the advice given above is good and will solve your problem, there are a few "main rules" about bandsaws tough, that I would like to expand a little, and they are;
*- The thicker the wood the less teeth the blade should have.
- The less teeth the blade has, the rougher the finish will be.
*- The less teeth a blade has the wider the blade should be.
*- The more teeth the blade has, the more it will clog/gum-up with sawdust, particularly with green/wet woods.
*- The thicker/Kerf the blade is/has the stronger it will be, HOWEVER, the quicker it will crack/brake on a small size bandsaw...! WHY...???
This is in fact one of the bigger dilemmas for small bandsaw users (up to 16"), as while we all need the blade strength with the capacity to cut well and straight, thicker blades do perform better with thicker and tougher woods BUT, what kills these heavy duty gauge blades or known as thick kerf, is the small wheel diameters of the bandsaw.
Thicker blades are less flexible, therefore, will require bigger size wheels to minimize the stress blades are put through when forced to turn in a small/tight diameter wheel. A good comparison to this phenomenon which is no more them pure physics, is the example of trying to bend a twig. It will bend quite well, until the bend/curve gets small, to the point that it will snap.
With bandsaw blades, the "snap" doesn't occur by itself, what I mean is, before the "snap" happens, there will be a number or cracks/fractures the the blade will develop when rotating in a tight circumference/wheel. Many times these fractures are not obvious until the blade start moving in a jig-saw motion, that would be the moment you should stop the bandsaw immediately.
Inspecting the blade after stopped, will show the "main" crack but, 90% of times, there will be a number of small cracks/fractures that have developed in the blade, trough-out its length. Repair these blades is totally out of question, and they should be discarded immediately...!
So, these are my suggestions;
- Use the blades best recommended for your bandsaw size.
- Inspect the blade occasionally for any fractures/cracks developing.
- When blade balance is performed in your machine, try to achieve it in low tension, rather than in high tension, this will save the machine's bearings and will put less tension on the "bend" of the blade. This does also, reduce the risk of a bad snap, due to the less/lower tension in the blade...!
My life would be a big nightmare without a good bandsaw, shame that they can be also the most expensive machine to maintain, particularly with blade replacements, that I know a little about...!
Cheers
George