SAINT-GOBAIN Norton Clipper BLOCKBUSTER BBM307, Owner'S Manual

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OwnersManual-MasonrySaw-BBMSeries-Rev09-2023
2. Move the conveyor cart near the blade and pull down on the head until the blade is lowered to
a point where it will lightly contact the top of the material. Then start "step cutting" - which
means passing the material beneath the blade with rapid, (50 to 60 strokes per minute) full
length strokes, taking a shallow cut (approximately 1/8" deep) on the forward, and also on the
backward stroke. Complete each rapid stroke backward and forward, by passing the material
beyond the center of the blade before starting the reverse movement of the cart. The harder
the material, the more rapid the forward and backward strokes. When Step Cutting the cutting
head of the BBM is free to move up and down.
3. "Step cutting as can be seen in the sketch below, lessens the area of the blade circumference
in contact with the material, keeping the blade cool, running free, and cutting at peak
efficiency. Don't get the impression "step" cutting means slow cutting - actually it is 6 times
faster than trying to "force" the cut by strong-arming the material through the blade. Forcing
the blade through with a deep cut causes a longer area of the blade circumference to be in
contact with the material, causing excessive friction heat to be generated, which then causes
the blade to "smear" or "load" with fused material particles and lose its sharp cutting surface.
(
Note: If improper operation should cause an abrasive blade to "smear", make several cuts
through a soft brick to "dress” the blade back to good cutting performance.)
Plunge Cutting
With Plunge Cutting the cutting head of the machine can move up and down and the conveyor cart is
locked in place so that material position cannot move. Jam Cutting is also known as Chop Sawing.
1. Position the Conveyor Cart under the Diamond Blade and lock it into place with the Conveyor
Cart Position Lock.
2. Clamp and hold material firmly against the backstop on conveyor cart. Be certain the material
does not slip or rock during cutting operation, as this can bind blade, causing excessive wear
and fracture.
3. Ensure that the Cutting Head of the machine is free to move up and down. See BBM307
Depth Adjustment and BBM158 Depth Adjustment on page 13 for details.
4. Turn the machine on and slowly lower the blade until the blade cuts completely thru the
material.
5. When the Diamond Blade has passed thru the material slowly raise the cutting head until the
blade had cleared the material.
6. Turn the machine OFF.
7. Remove the material when the blade stops rotating.
OPERATION