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RCC130H-CRACK SAW OPERATION AND PARTS MANUAL REV #1 (11/18/04) PAGE 24
ASSEMBLY INSTRUCTIONS/OPERATIONS
FIGURE 25
The amount and direction of forces to apply to the
operator handle are governed by, but not
necessarily limited to the following factors:
a) Average Random Crack Width.
b) Diamond Blade Saw Width.
c) Sawing Depth.
d) Tensile strength of the material being sawed.
e) Matrix material of the diamond blade segments in
consideration of the aggregate type, amount and/or
hardness contained in the material being sawed.
f) Service condition of the diamond blade segments.
g) Operating RPM speed range for the diamond
blade.
9)For normal job applications, operate the engine at
a maximum, governed speed of 3450 RPM. Consult
the material supplied by the engine manufacturer
and the Specifications section for specific
information. If you have any questions regarding
specific job applications, contact the Customer
Service Department for information. There is no
charge for this service. Additional information can be
obtained from the Masonry and Concrete Saw
Manufacturers Institute, 30200 Detroit Road,
Cleveland, OH 44145-1967.
DANGER
THE CRACK SAW IS DESIGNED FOR THE
ENGINE TO OPERATE AT A MAXIMUM,
GOVERNED SPEED OF 3450 RPM. THIS ENGINE
SPEED AND THE V-BELT REDUCTION SYSTEM
ALLOWS THE DIAMOND BLADE TO OPERATE
WITHIN THE INDUSTRY ACCEPTED RPM SPEED
RANGE. FIELD CHANGES AND/OR
ALTERATIONS MADE TO THE FACTORY SET
ENGINE SPEED RANGE AND/OR V-BELT
PULLEY(S) CAN ALLOW THE DIAMOND BLADE
TO OPERATE OUTSIDE THE INDUSTRY
ACCEPTED RPM SPEED RANGE. THIS
OCCURRENCE CAN RESULT IN PROPERTY
DAMAGE AND/OR PERSONAL INJURY.
10) The wide variety of potential work surface
materials along with the corresponding variety of job
site environments, make it impossible to develop a
standardized operating procedure for the Crack
Saw. Use of the Crack Saw will require constant trial
and error testing until satisfactory results are
achieved. Experience gained over time and common
sense will help minimize the amount of necessary
testing. Many factors will directly affect the operating
parameters and/or techniques utilized for a
specialized job application. Some of these factors
include:
a) Work surface material yield and tensile values. As
a general rule, these values will determine material
removal rate per unit of time. Materials with high
yield and tensile values will characteristically
resist/limit material penetration. For such materials,
the accepted procedure is to make a number of
multiple passes over the work surface rather than
attempt to make a single, deep pass. The net effect
is to actually increase productivity: more material
removed in less time. Other added benefits to this
technique are decreased vibration, less operator
fatigue and increased component service life.
b) The width of the random crack in comparison to
the required cutting width and depth. For example, if
the random crack has an average width of 1/8 inch,
productivity rates will be greater with the use of a 1/4
inch wide blade over that delivered by a 1/2 inch
wide blade. The same analogy can also be used for
the cutting depth. Productivity rates will be greater
for a 1/2 inch deep cut than a 1-inch deep cut.
Deeper cuts also require additional time for the
blade to "clear itself" when following a random crack
pattern.