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Deburring. Back to Sharpening TOOTH-SETTER TRICKS PAGE 1
After the blade is sharpened there is a burr on the back side of the tooth edge. This is caused by the grinding action pulling steel in the direction of grind-wheel rotation. It occurs only on one side of the blade, the inside. This burr must be removed from the tooth tips only, to insure a true set reading on the tooth-setter gauge. As much as 4/1000's difference will occur when the burr is removed. Care must be taken to set the height of the blade in the setter so the burr is just above the back clamp block. If you set the blade with the burr and then use the blade, instantly the set will be wrong by enough to greatly affect the performance. It is more important to have both sides of the blade set the same, than the amount of set. I recommend a 25/1000's set. Then set every other sharpening, sometimes two sharpenings. Remove the freshly sharpened saw-blade from the grinder and turn it inside out. Be sure to wear gloves. Take a 1.5" square oak block 18" long, and rub the tooth edge of the blade. Rub the blade three times, then grab the point where the wooden block stops and rub the next section three times, and repeat until the entire blade is done. Start and stop at the weld to be sure the entire blade was de-burred. This needs to be done to this side only. The block needs to rub the tooth tips only. Rub the tooth tips... with the hook angle, if you rub against the hook angle, the oak block won't last long. Note the angle of the blade to be sure the teeth do not contact the floor. If the blade drops to the floor tooth side down, or the teeth rub a concrete floor, it will affect the sharpness. |
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