8
The wet-and-dry grinder is a multi-function tool for
the rough and precision grinding of metals, plastics
and other materials using a selection of grinding
wheels.
The machine must only be used for its intended
purpose! Even if the machine is used as intended,
certain residual risk factors cannot be completely
eliminated. The following hazards may arise in
connection with the machine’s construction and
layout:
앬
Contact with the grinding wheel where it is not
covered.
앬
Catapulting of parts from damaged grinding
wheels.
앬
Catapulting of workpieces and parts of workpieces
from the machine.
앬
Damage to hearing if ear-muffs are not used as
necessary.
Special safety instructions
1.
Each time before you begin to work with the
grinding machine, carry out an acoustic test on
its grinding wheel (if a grinding wheel is in good
condition it will produce a clear tone when
tapped, e.g. with a plastic hammer). It is also
important to perform this test when fitting new
grinding wheels (risk of damage in transit).
Always have the machine run in idle mode for a
test period of at least 5 minutes. Leave the
danger zone for this period.
2.
Use only grinding wheels which are marked with
data specifying the manufacturer, type of
bonding, dimensions and permissible rpm.
3.
Keep grinding wheels in a dry place where the
temperature is as constant as possible.
4.
Use only the supplied clamping flanges to mount
the grinding wheels.
5.
The clamping flanges used to mount the grinding
wheels must be of identical size and format.
Backing layers between the clamping flange and
the grinding wheel must be made of elastic
materials, e.g. rubber, soft board, etc.
6.
It is prohibited to enlarge the mounting hole in a
grinding wheel by re-drilling.
7.
The workpiece supports and the adjustable
upper guards must always be positioned as
close as possible to the grinding wheel (max.
gap 2 mm).
8.
Never use a grinding wheel without a safety
guard. Make sure that the following distances are
not exceeded:
- workpiece support / grinding wheel: max. 2 mm
- safety guard / grinding wheel: max. 2 mm
9.
The guard holder, workpiece support and
transparent guard must all be fitted before you
use the double grinder.
10. Always pull out the power plug before changing
a grinding wheel.
11. The maximum peripheral speed of the dry
grinding wheel is: 21,98 m/s
Calculation:
peripheral speed
m/s = d x 3,14 x n
60 x 1000
d = diameter of the grinding wheel in mm
n = motor rpm
Example:
m/s = 150 x 3,14 x 2800
60 x 1000
= 21,98 m/s
12. The maximum peripheral speed of the wet
grinding wheel is: 1,40 m/s
Calculation:
peripheral speed
m/s = d x 3,14 x n
60 x 1000
d = diameter of the grinding wheel in mm
n = motor rpm
Example:
m/s = 150 x 3,14 x 134
60 x 1000
= 1,40 m/s
13. Maximum permissible motor housing
temperature: 80°C
14. Fill the black water tank of the fine grinding
wheel with water up to the shaft axle.
15. Before starting work firmly screw the grinder to
the workbench etc. using the 4 mounting holes in
the base plate.
16. Adjust the spark deflector periodically in order to
compensate the wear of the wheel. Please note
that the distance between the spark deflector
and the wheel is to be kept as small as possible
and should in no case exceed 2 mm.
17. The grinding wheel must be replaced at the
latest when the spark deflector (3) and the
workpiece support (7) can no longer be set a
maximum distance of 2 mm from the grinding
wheel.
Wear safety gloves
GB
Anleitung NTS 2000 SPK 1 11.05.2005 12:45 Uhr Seite 8
