NUTOOL NGB125, Руководство пользователя

Страница: 19 / 36

19
GB
BENCH GRINDER ASSEMBLY INSTRUCTIONS (Pic. 2)
To mount the spark guard, unscrew the bolt and remove the
nut (2.1). Place the bolt in the spark guard groove and the hole
in the grinder body. Apply the nut and finger-tighten it slightly.
Position the spark guard so that it does not come into contact
with the grinding wheel. Tighten the nut firmly.
WORK REST FOOT ASSEMBLY (Pic. 3)
Work rest feet are essentially factory-mounted, however they
may require additional adjustment. Loosen the bolts (3.1),
leaving a clearance of about 3 mm between the work rest and
the grinding wheel.
GRINDER MOUNTING TO A BENCH (Pic. 4)
The grinder can be additionally secured with screws or bolts
and nuts. Locate the mounting holes (4.1). The length of the
bolts depends on the thickness of the bench. If the bench is
made of a strong steel casting, best results are achieved if
the grinder is mounted on a board placed on the bench, which
significantly reduces vibrations. After mounting the tool to the
bench, attach all accessories for mounting and grinding, as well
as standard-equipment guards. The tool is now ready for use.
STARTING & STOPPING (Pic. 5)
Before connecting the tool to a power supply source, check
whether all wheels can move freely and do not bind. Connect
the tool to a power supply source and press the rocker switch
to the ON position (5.2). To stop the machine, press the rocker
switch to the OFF position (5.1).
REMOVING THE GRINDING WHEEL GUARD (Pic. 6)
Before proceeding to any assembly work, switch off the BENCH
GRINDER from mains supply. Wait until grinding wheels stop
rotating.
In order to remove the grinding wheel guard (6.2), unscrew its
three fixing bolts and nuts (6.1).
REMOVING THE GRINDING WHEEL (Pics. 7-8)
Hold the other wheel firmly, usually hand pressure should be
sufficient (if the wheel is worn, it may be necessary to jam it with
a small piece of wood). If the wheel needs replacing, remove
the locking nut (7.1) with a 19 mm spanner, outer flange and
the paper washer (7.3.). Remove the grinding wheel (8.1). Also
remove the paper washer and check it for wear.
Do not forget to put the paper washer back in place when
assembling back the tool.
Check both paper washers for wear, and replace if required.
Fit a new grinding wheel (available from an authorised reseller/
supplier), and repeat the above procedure in reverse order.
Remember that the locking nut of the wheel on the right side
of the grinder has a standard right-handed thread (turn it in
an anti-clockwise direction for loosening). The nut on the left
side has a left-handed thread (turn it in a clockwise direction
for loosening).
Note: When used in an industrial environment grinding wheel
and sanding belt should only be fitted by a fully qualified person.
Replacement wheels are available from your local stockist.
GRINDING WHEEL INFORMATION
The following information is a guide only on the different types of
grinding wheels and their uses.
TYPES OF ABRASIVE GRAIN
Grinding wheels are made of four main types of abrasive grain:
aluminium oxide, silicon carbide, CBN (cubic boron nitride and
diamond. In the home workshop you will probably only use
wheels of aluminium oxide or silicon carbide. Both types are
available from your tool stockist.
Grain size is separated into four main categories: course,
medium, fine and very fine.
Table 1 shows the breakdown of grain size in each category.
You will probably never need a coarse wheel. For most work a
medium or fine wheel is recommended.
COMPONENTS AND CONTROLS (Pic. 1)
1 Spark guard 5 ON/OFF Switch
2 Coarse grinding wheel 6 Right work rest
3 Left work rest 7 Medium grinding wheel
4 Mounting holes