My bands have been breaking after one or two sharpenings. I have been sharpening my blades for several years. I notice my bandwheel has a slight wobble in it. All of the bolts are tight and the wheel itself is tight. I have a Timberharverster and was wondering how to realign the wheel? Also could this be the problem for the blades breaking?
(Sawing and Drying Forum)
From contributor A:
Belted band wheels are not good. Replace them with Cooks all metal wheels. I have two mills each with the different wheels on them. My second one is about to get the all metal wheels. Go to a big mill and you will find out that the wider mills use all metal wheels. The reason is plain and simple, less vibration on the band.
If the wheel has a wobble but is still tight, you've somehow bent the wheel which is a major feat and rather unlikely. If you can grab the wheel and wiggle it, the bearings are going. I'm guessing it's the idler wheel you're talking about as that bearing is a common wear item on a TH. The wheel will have to be taken off the idler hub, the bearing removed, and a new one pressed in.
Your blade breakage problem is caused by something other than a wobble in the wheel. Have you always experienced such short blade life? The cause can be anything from improper sharpening to guide wheel issues to waiting too long to change out dull blades and pushing them to the point of heating up. It may also be caused by using a blade too thick for the diameter wheels you have and you are experiencing premature metal fatigue.
More input is needed. The only time you need to re-align the wheels is if you are experiencing a tracking problem.
If you do want to realign your wheels you just need to loosen the four bolts that hold the brackets on both sides of the head that the band wheel bearings and shafts are mounted to. You almost have to have somebody help you - one person to hold the band wheel in position while the other person tightens the bolts back down.
Also make sure your wheels are co-planer. Your blades can track fine and the band wheels will still be out of co-planer. This will definitely break your blades. Also you might want to check your blade tension. Be sure and measure the spring. Our gauge was off right from the factory.
You could try cleaning the mating surfaces of the wheel/hub and mount the wheel again. I broke down and purchase a magnetic base and dial indicator to measure my wheels. The machine builder (Mighty Mite) does not verify each machine they build. They pay a third party to machine them true, but I always like to verify things are right myself (I wish they felt that way). My wheels are true within my ability to measure.