Huvema HU 250 CS, Manual, Page: 5 / 20

5
CHANGES AND T YPING ERRORS RESERVED CHANGES AND T YPING ERRORS RESERVED CHANGES AND T YPING ERRORS RESERVED
4.2 c
oolanT
The sawing machine can, depending on the version, be equipped with a circulation system or with atomized lubrication.
Circulation system
Fill the tank with coolant. Use sawing coolant and absolutely NO cutting oil. Bewo recommends Bewo Oil S, avaible from
your dealer. The coolant must be diluted in waer in a ratio between 1:10 and 1:20, depending on the kind of material.
Add the oil slowly to the water while stirring it continually. The filler cap is positioned at the rear of the machine base. The
capacity of the tank is 30 litres. The coolant circulates and for the larger part flows back into the tank. After some time the
coolant will be used up completely and the tank will have to be filled again. A filter is also incorporated in the coolant
circuit.
4.3 e
lecTriciTy
Have the electrical connections made by a qualified installer. Connect the machine in accordance with the electrical
diagram applying to your machine.
Saw motor Two-speed pole changing motors are suitable for one mains voltage only. Therefore check whether the voltage
indicated on the motor plate complies with the local main voltage.
• Check whether the direction of rotation of the saw spindle corresponds to the arrow on the safety guard.
• If the motor rotates in the wrong direction two phases wires must be switched.
5. o
peraTion
5.1 s
elecTion of THe sawblade
After years of research we recommend you to use only Timewinner saw blades. These HSS saw blades are of top quality and
are made of the base material DMO 5. These saw blades have undergone a special heat treatment which guarantees high
wear resistance. Owing to the microsporous structure the cutting oil is transferred quicker int o the saw cut. This means
longer life before resharpening and less chance of cold welding.
The quality of the saw blade is of great importance. The selection of the correct pitch depends on the material to be sawn.
The selection of the correct pitch and ra ke angle is of great importance for the life of the sawblade.
5.2 s
elecTion of piTcH and TooTH form
If the pitch is too small and the length of the cut too large, the cut material cannot be taken into the tooth cavity. The chip
will get stuck in the tooth cavity, so that it is inactive in case of a second cut of the same tooth. This can cause the saw blade
to jam and break. A pitch which is too large will cause the sawing tooth to hack as a result of which teeth can break free.
For the sawing of profiles it must be taken as a rule that at least two teeth of the saw blade are in cut. Fig. 5.01 will help you
determine the pitch for the material to be sawn.
Hint If a short, hard jerk is felt during sawing and the saw starts jolting, do not continue. I n such cases it is almost certain
that at one or more places a fine chip has fused away at the flank of the saw tooth. This causes the saw to be slightly thicker
at certain places. Remove the saw blade and remove the fused material with a fine-grained, high-grade saw file.
Selection of the tooth form.
Besides a well selected pitch the following factors, too, are of great importance to facilitate the correct machining of the
material (fig. 5.02):
4
The protective guard opens and closes automatically. The saw blade can easily
be exchanged. The machine as standard is equipped with an adapter for the
saw blade (see technical data). If ordered a different adapter can be supp lied.
4 Installation
4.1 Installation and mounting
Unpack the machine.
• Determine where the sawing machine will be placed. In doing so take into account the
feed and discharge of materials, optional built -on accessories, maintenance and repairs.
• Remove the plastic plug from the saw head (fig. 4.01 B). If so required a lifting hook
M20 DIN 580 can be screwed into the hole.
• Place the saw unit - if necessary by means of hoisting equipment – on the machine
base (cover at the rear) and attach each oth er.
• Secure the machine to the floor. The necessary holes have already been made in the
machine base.
• Install the handle in the saw head and lock it (fig 4.01A).
• Install the 3 short handles in the boss of the machine vice.
• Install the stretcher in the clamp.
• Slide the plastic tube coming from the cooling pump onto the tap which is positioned on
top of the protective guard of the saw unit (fig 4.02A).
• Check on the level gauge of the saw head whether it contains sufficient oil. If
necessary fill up (fig. 4.01, see arrow).
• Install the cover at the rear of the machine base.
• Install the saw blade (see chapter 5.4).
.
4.2 Coolant
The sawing machine can, depending on the version, be equipped with a circulation
system or with atomized lubrication.
Circulation system
Fill the tank with coolant. Use sawing coolant and absolutely NO cutting oil. Bewo