Selecting Cutting Speed And Advance Speed; Blade Break-In Procedure - Elite EHB-350DGSVIP Bedienungsanleitung

COMBO TOOTH: with 9º - 10°positive rake.
positive
This type of blade is the most suitable for the cutting of section
bars and large and thick pipes as well as for the cutting of solid
bars at maximum machine capacity. Available pitches: 3-4/4-6.
SETS:
Saw teeth bent out of the plane of the saw body, resulting in a
wide cut in the work-piece.
REGULAR OR RAKER SET: Cutting teeth right and left,
alternated by a straight tooth.
Of general use for materials with dimensions superior to 5 mm.
Used for the cutting of steel, castings and hard nonferrous
materials.
WAVY SET: Set in smooth waves.
This set is associated with very fine teeth and it is mainly used
for the cutting of pipes and thin section bars (from 1 to 3 mm).
ALTERNATE SET (IN GROUPS):
Groups of cutting teeth right and left, alternated by a straight
tooth.
This set is associated with very fine teeth and it is used for
extremely thin materials (less than 1mm).
ALTERNATE SET (INDIVIDUAL TEETH):
Cutting teeth right and left.
This set is used for the cutting of nonferrous soft materials,
plastics and wood.
10.5 Selecting Cutting Speed and Advance
Speed
The cutting speed (m/min) and the advance speed (cm
=area traveled by the disk teeth when removing shavings) are
limited by the allowable heat rise at the tips of the teeth.
Cutting speed selection:
The general rule is the harder the material being cut, the
slower the blade speed.
- 20-30 m/min
For stainless steel, tool steel, bearing bronze.
- 30-45 m/min
For alloy steel, hard cast iron, hard bronze
- 45-60 m/min
For mild steel, soft cast iron, medium hard bronze, hard
aluminium
- 60-85 m/min
For plastic, soft and medium aluminium, other light
materials.
Note:
The cutting speed depends on the material tensile strength
(N/mm
cutting section (mm).
Advance speed selection:
Too high advance speed (= lowering of the saw frame) tends to
cause the blade to deviate from the ideal cutting path,
producing non-square cuts on both the vertical and the
horizontal plane.
The best combination of these two parameters can be seen
directly examining the chips.
- Long spiral-shaped chips indicate ideal cutting.
- Very fine or pulverized chips indicate lack of feed and/or
cutting pressure.
- Thick and/or blue chips indicate overload of the blade
(cutting speed and / or advance speed too high).

10.6 Blade Break-in Procedure

New blades are very sharp and, therefore, have a
tooth geometry which is easily damaged if a careful
break-in procedure is not followed (Fig. 10-4).
When cutting for the first time, it is good practice to break-in
the blade making a series of cuts at a low advance speed (= 30-
2
35 cm /min on material of average dimensions with respect to
the cutting capacity and solid section of normal steel with R =
410-510 N/mm
Generously spray the cutting area with lubricating coolant.
2
/min
22
2
), the material hardness (HRC) and the widest
2
).
Figure 10-4: Blade Break-in Procedure