JPW JET MBS-708CSB, Руководство по эксплуатации

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(Too many teeth engaged in the work piece will
prevent attainment of a satisfactory sawing rate;
frequently cause premature blade wearing;
frequently produce "dished" cuts or the cuts are
neither square nor parallel.)
4. The chart is not expected to be correct for all cases.
It is intended as a general guide to good sawing
practices. Your blade supplier or qualified
engineers should be you most reliable source for
correct information on operational details of saw
blades and their use.
Note:
1. When cutting a thin walled pipe, angle steel, and I-
beam steel use a blade with 5/8 TPI.
2. Cutting pipe with 1/2" or more wall thickness uses a
blade with 5/8 TPI or 4/6 TPI.
3. When cutting angle steel, H-beam, or solid bar
material, cut the thinnest cross section of the
material first. There must be at least 3 teeth cutting
the material at all times.
Blade Speeds
When user operates band saw always change the blade
speed to best suit the material being cut.
Refer to Fig 33.
Adjust the blade speed while the machine is running.
Controls the variable speeds between 35-85 MPM, turn
the speed control knob to get desired speed for cutting
the work piece, below is blade speed chart for cutting
reference.
Fig.32
Blade speed selection chart
1. 35 ~ 44
MPM
Tool steel,
stainless steel,
Hard cast iron,
Alloy steel, Hard
bronze
2. 45 ~ 59
MPM
Mild steel, Soft
cast iron,
Medium hard
bronze, Hard
aluminum.
3. 60 ~ 85
MPM
Plastics,
Soft and medium
aluminum,
Other light
materials.
Fig.33
Evaluating cutting efficiency
Is the blade cutting efficiently? The best way to
determine this is to observe the chips formed by the
cutting blade.
If chip formation is powdery, then the feed rate is much
too light, or the blade is dull.
If chips formed are curled, but colored — that is, either
blue or straw-colored from heat generated during the
cut — then the feed rate is too high.
If chips are slightly curled and are not colored by heat –
the blade is sufficiently sharp and is cutting at its most
efficient rate.