A good way to check for this is to tighten the blade while slowly turning the wheels, keep plucking the blade to see if the pitch changes from changes in tension. The small roller skate bearings roll inside the holes of the main bearings, so the wheels could turn more easily. So that rules out the top wheel and non-roundness of the wheels as possible sources of vibrations.
Solving band saw vibration problems is often just a matter of maintenance, and comes with the option of making an upgrade or two that can really make a difference. The change can be dramatic, as we read in our Twist Link customer reviews: Band saw tires are another likely source of vibration. Urethane Band Saw Tires stay smooth and flexible far longer than standard rubber band saw tires, improve tracking, and give your blade a soft, consistent ride.
I’ve changed the tires out with polyurethane tires, I’ve swapped out the rubber motor mounts with plywood, I’ve checked the alignment of the wheels with a level, the wheels spin freely with no wobble when I hand-crank, it happens with various sized blades, the guides are where they’re supposed to be and tightened. If convenient to eventually dismount the wheels down to their hub, you could likely use an inexpensive conical balance tool that can be found in the lawnmower maintenance section of a hardware store to check for any gross wheel imbalances. Kindly let us know something more about the frequency of that vibration…. Frequency of vibration is about every three to four revolutions of the wheels.
You have identified the problem, with the lever arm from the column to the guide acting on the joint at the riser block anything that introduces slop at the riser block interfaces will allow movement. If you need a shim here the shim needs to run all the way across the riser block joint surface, you can avoid disassembling the column by making a matching shim half and installing from the other side with the riser block joint loosened a bit.
Recently I had an unusual blade vibration problem with my bandsaw related to a bad tire That made me realize that there are three different types of vibration issues. As the tire carries the blade around, the misaligned tire causes the blade to oscillate back and forth. As I turned the blade by hand, I noticed that the blade got closer to the thrust bearing at a different point on the blade with each revolution.
The pulleys line up correctly and the belt is tight, so I pushed a wooden wedge between the motor and the saw to tension the belt. Then shorten the link belt to equal the length of the original belt. Match the direction of travel stamped on the belt links, shown below, to the direction the saw pulleys turn, and tension the belt according to the saw manufacturer’s instructions.
why does my bandsaw vibration Related Question:
Can you over tension a bandsaw?
Large bandsaws have frames that are capable of overtensioning a blade, which causes it to break. A tension meter is the most accurate way of setting the blade tension.
Why is my circular saw vibrating?
The vibration of the saw blade is caused by external interference and is always expressed as a certain “level”. The vibration will increase saw path loss, reduce sawing accuracy, increase the noise level, and shorten the service life of saw blades.
Why is my bandsaw blade vibrating?
Band saw tires are another likely source of vibration. Tired tires, caked with pitch and dust or full of cracks and missing chunks, can not only contribute to blade and saw vibration but can also cause major blade tracking problems.
How much tension should a bandsaw blade have?
For carbon steel toothed blades (cutting blades) this is typically 15,000 to 25,000 PSI. Slitting type blades typically are tensioned in the range of 12,000 to 20,000 PSI. In general bandsaw blades are never tensioned past 35,000 psi.
How long should a bandsaw blade last?
On average your bandsaw blade should last 6 months to as long as a few years depending on what your cutting with it. Make sure to match your blade strength and quality to the project and material your cutting.
Why are there holes in saw blades?
Expansion Slots & Holes- Cuts in the blade that start from the outside edge are called “expansion slots,” and they usually include small holes at the end of a curved shape. These cuts give the blade a little room to expand when heating up during use, and they help dissipate some of the heat in the blade.
Why are my bandsaw cuts wavy?
The clasic cause for wavy lumber is pushing a dull blade past it’s limits. Sharp don’t get it.
Why does my bandsaw spark?
Ceramics can cause sparks. Or, if your thrust bearing is too far past the blade, more toward the center of the bearing than the edge, then it won’t turn and you’ll get sparks too, and possibly wear a groove in the bearing.
How do you fix a bent bandsaw blade?
How to straighten a bandsaw blade? It is risky but if it’s absolutely necessary, a temporary fix to straighten a bandsaw blade can be done by placing it on an anvil and gently tapping it flat with a nylon head hammer/mallet or using a pair of gas pliers to straighten out the blade.
Why do I keep breaking band saw blades?
Machine Defects Even the best blades can fail if there is something else wrong with your bandsaw, and even a small misalignment of bearings or guides can put a twist in the blade as it goes around. Resulting in tension being applied in all the wrong ways which will lead to early breakage.