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Similarly you must adjust the upper block guides in their forward-back positions centering them to the center of the blades width. In their left-right positions adjust the guide blocks to only faintly touch the blade. Adjust the lower blade guides in the same manner. Testing: And at that your bandsaw blade removal and reinstallation is almost complete. The last step of the procedure is simply testing the sucker out. Plug-in and engage your bandsaw. Observe the blade - ensure it doesnt vibrate or fall out of center. In the event the blade does vibrate or fall out of center simply re-tension and re-track the blade until it spins properly. Im often asked what sort of blades I use on my bandsaw. And the answer is - it depends.
This causes a band to start diving into the log in an uncontrolled manner. Remember that distortion is caused when a band is driven with a tooth load greater than the body steel is capable of withstanding and still return back to its original shape. Any bandsaw that is pushed to this point of stretch has become distorted. This will cause the band to not run good and it will dive into the log because of the natural change of curvature called anti-clastic curvature. Myth of restoring bandsaws debunked: When this happens the band cannot be restored to new by the Saw Repairman/Sawfiler. However the sawfiler can distort the middle of the back of the band to equal the front stretch/distortion. Of course for those who know the term this is called benching. This is when a roller or hammer is used to expand/distort the molecules to match the front distortion. The roller stretches the molecules by elongating them as it is pressed between two specially shaped steel rollers. The hammer expands the molecules in a star burst shape to achieve the distortion of making the middle of the band back longer. The hammer needs to be crowned to give a star burst expansion.
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Remember the term certain distance this is important. Each molecule of steel is round in shape and can be stretched or elongated to a certain distance before it is stressed and begins to remain elongated. When a molecule remains elongated it has been distorted in the gullet from pulling too large (more than the body molecules can take) of a tooth load. The band gullet has what we call a long front. We say this because the front has stretched but the molecules at the back of the band have remained un stretched. This condition causes a hump that rises up in the middle portion of the band or in other words the middle of the band will hump toward the slab side and the mirror image is on the log side being concave. At this point the band will dive into the log every time! Note: A good spring has the ability to elongate or compress a certain or prescribed amount and return to its original shape millions of times without losing strength.