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Use and maintenance manual DM-1215
Cutting speed and downstroke speed
The cutting speed (m/min) and the downstroke speed (cm
2
/min) are limited by
the heat generated around the points of the teeth. If the downstroke speed is too
high, the cut will not be straight, either vertically or horizontally.
The cutting speed depends, as indicated above, on the tensile strength of the
material (kg/mm
2
), its hardness (HRB) and the thickness of largest sections. The
downstroke speed depends on the material thickness. Therefore, large-section,
solid or thick-walled materials (s > 5 mm), can be cut at high speeds, providing
there is sufficient swarf removal from the blade; thin-walled materials, such as
slim piping or profiles, must be cut using low and especially constant downstroke
speeds.
A new blade must be worn in, which in effect means lowering the downstroke
speed to about half that of normal (from 60 to 70 cm
2
/min on normal steels),
equal to a removed surface area of about 300 - 600 cm
2
.
Types of swarf:
Very fine or fragmented swarf indicates that the downstroke speed and/or cutting
pressure is too low.
Thick and/or blue swarf indicates that the blade is overloaded.
Long coils of swarf indicate ideal cutting conditions.
Summary of Contents for DM-1215
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Page 58: ...6 12 57 Use and maintenance manual DM 1215 S4 KSTO S8 S4 K01 ...
Page 59: ...6 13 58 Diagrams exploded views and replace KSTO KSTO RT4 ...
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Page 71: ...6 25 70 Front flywheel assembly ...
Page 74: ...6 28 73 Use and maintenance manual DM 1215 Motor flywheel assembly ...
Page 77: ...6 31 76 Cutting head cover ...
Page 79: ...6 33 78 Vice assembly ...
Page 81: ...6 35 80 Base assembly ...
Page 83: ...6 37 82 Control panel ...
Page 85: ...6 39 84 Fixed work table and turntable ...
Page 88: ...6 42 87 Use and maintenance manual DM 1215 Cylinder unit ...
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