PREPARING THE BLADE
(1) Cutting the Blade: Cut the saw blade to length. Use the blade shear
if it is available. Using the blade shear will insure that the blade
ends are flat, square and smooth.
(2) Tooth Spacing: In fine pitched bands, one or more teeth on each
side of the cut must be removed by grinding, so that the cross
section of the weld area of the band is uniform. This will also
insure proper tooth spacing at the weld area and that the set
pattern of the teeth will be retained.
If snips are used to cut blade,
Using the Blade Shear.
grind ends square as shown.
If the Blade Shear has not been used to cut the blade, square the ends of the blade
before welding. Grind both ends of the saw blade in one operation as shown in the
sketch. Hold the ends so that the teeth point in opposite directions. Regardless
of the angle of grinding, the two ends will match perfectly when turned over.
(3) Clean the band: Use No. 120 grit emery cloth or equivalent for
this operation. Care must be taken so that the teeth are not
touched with the emery cloth, because the set or sharpness of the
teeth could be damaged. The part of each end of the band that comes
into contact with the inserts must be sanded. Any dirt, oil, oxide or
scale that is not removed will prevent good electrical contact. The
oxide on Dart Blade -must be removed.