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Graule Maschinenbau GmbH ,
Robert-Bosch-Str. 7, D-73431 Aalen
Tel: 0049 (0)7361 49511 Fax: 0049 (0)7361 49521, e-mail:info@graule.de
8.7 Selecting and replacing the saw blades
On cross-sectional saws with extension arms only saw blades with negative effective cutting
angle may be used! An effective cutting angle from -3° to -5° is appropriate.
Select a HM-circular saw blade fitting to the material to be cut. See list of accessories.
DISCONNECT THE MAINS PLUG when replacing the saw blade! By using the
handwheel for the elevation adjustment, lift up the saw slide so that the saw blade may run
free above the material supporting table. Pull the saw unit completely forwards and stop it
there by means of the knurled screw at the guide carriage behind the motor. Remove the left
saw blade protection hood. Stop the saw blade by putting across a wood lath and open the
saw blade straining screw to the right. Caution: the straining screw has a left thread! Insert
the saw blade. Place the face chuck in such a way that the locking pin of the saw blade
flange graps into the bore holes of the face chuck. Make sure that the clamping surfaces on
the saw blade flange, saw blade and face chuck are clean and free from dust. Tighten the
straining screw and mount the protection hood.
8.8 Hydraulic feed brake (option)
The hydraulic feed brake prevents the saw blade to be pulled into the cut material. Adjust
the feed speed with the knurled brass screw at the valve block. Select the speed in such a
way that the saw blade can easily cut the material.
The liquid in the feed brake is a drilling oil emulsion with a ratio of mixture 1:40 with
water.
Do not close the screw cap of the liquid container completely, so that the air may stream in
and out. If an insulating air cushion builds up in the tube of the hydraulic feed brake, you
must open the choker screw turning approx. 3 times and pull the tool slide quite to the front
a few times, so that the air cushion will be squeezed out of the tube. Then adjust again the
choker screw.
8.9 Pneumatic saw blade spray appliance (option)
Release the saw blade spray appliance using the lever valve beside the pull handle. Adjust
the spray nozzle by means of the knurled screw at the orifice hood in such a way that there
will be a light smoke-screen on the saw blade. No banked-up water level must build up on
the machine. As to the liquid for the spray appliance, it is a customary coolant and lubricant,
adequately diluted, for metal finishing.
8.10 Pneumatic material tension (option)
The cut material should always be tensed as near as possible to the cutting line. Make always
sure that the cylinder retaining arm never lies on the cutting line. Adjust the clamping
cylinder leaving max. 5 mm air between the cut material and the pulled in thrust piece of the
clamping cylinder. SQUEEZE DANGER! The air pressure must fit the material to be
tensed. The material to be tensed must not be compressed. The use of suitable additions is
recommended. The valve for the pneumatic material tension is on the right in front of the
material supporting table.
8.11 Mitre adjustment
There are adjusting dead stops for 90° and 45° . Intermediate mitres can be adjusted at your
choice according to scales.
Horizontal mitre adjustment: release the back lower clamping lever. The machine may now
be swivelled to the left. To adjust the mitre to the right, pull up the stop pin in the oscillating
crank, so that the 90° cam can be overrun. After adjusting the mitre, the oscillating crank
must be stopped again by means of the clamping lever.
8.12 Elevation adjustment
You can adjust the elevation of the saw blade by means of the handwheel. For this purpose
lightly loosen the wing screws which press on the vertical supports and tighten them again
after adjusting. Adjust the elevation of the saw blade so that it may cut approx. 5-8mm deep
in the wood platform. The depth gauge for this adjustment is on the support block behind
both vertical pillars for the elevation adjustment.
7


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