Page No 2
Safety Rules For A Grinder
1) Read all the instructions before using this tool. All operators must be
fully trained in its use and aware of these safety rules.
2) Do not exceed the maximum working air pressure.
Operating
With the grinder correctly connected to the air supply, check the speed
of the grinder with an inlet pressure of 100 psi/7.0 bar measured at the
tool inlet. Check with a calibrated tachometer. Check that the guard is in
position and securely fixed. Check that the grinding wheel is of correct
dimensions, is not cracked or chipped and has a permitted speed
rating higher than the maximum permissible running speed of the
grinder which is 18,000 RPM. Do not over tighten as this could crack
the wheel. It should be tight enough to prevent wheel spin off when the
air supply is shut off.
When first starting the grinder with a new or changed wheel fitted, the
grinder should first be started in a protected area, i.e. such as under a
heavy bench well away from other persons and run for, say, one
minute. This will provide protection if the wheel should break because
some fault was not detected.
Always use eye protection and wear protective gloves if there are sharp
edges in the working area. The tool and the grinding process can create
a noise level such that ear protectors should be worn.
If the grinding process creates a dust then use a suitable breathing
mask.
Check that the material being worked will not cause harmful dust or
fumes. If this is so then special breathing apparatus may be required.
Seek advice before starting work.
If the grinder vibrates when first fitting the wheel or during use, remove
from service immediately and arrange for the fault to be corrected
before continuing to use.
Do not apply excessive pressure as this will reduce the cutting
efficiency. Apply light loads and allow the wheel to cut.
Handle the grinder with care. If the grinder is dropped, carefully
examine the wheel for damage and replace if necessary. Start the
machine as if for the first time of fitting a wheel, i.e. under a bench.
Make sure the object to be ground is in a firm fixed position.
Dismantling & Assembly Instructions
Disconnect the tool from the air supply,
Hold the housing (1) in a vice, unscrew lock ring (23) and take off the
valve body (3), then push out the 2 spring pins (2 & 38) and remove the
lever (4). To remove the adjust valve assembly, use a slotted
screwdriver and unscrew the throttle valve plug (11) then take out parts
(10,9,6,7,8 and 5) in this sequence. Remove the guard by first taking
out 3 screws (25) then pull off the guard (43). To remove the bevel gear
(30), first take out lock nut (31) then remove seal (35) bearing (20) then
you can remove the bevel gear (30) also the bearing (13). To remove
the motor assembly first take out lock nut (21) counter clockwise, then
pull out the motor assembly. Take off the pinion gear (22) then tap the
rotor to loosen the assembly, take out front end plate (19) and remove
the bearing (20). Take out the rotor blades (16) from the rotor (15) and
remove the cylinder (18). Take off the rear end plate (14) and bearing
(13).
Reassembly
Clean all parts and examine for wear and cracks, etc. and replace as
necessary. Look in particular for wear and cuts on O-rings, wear on
rotor blades and wear on bearing (13) and (20). Make sure that the
faces of end plates (14) and (19) that about cylinder (18) are flat and
free from burrs. Lap on a flat fine grade of abrasive paper if necessary.
Before placing the motor assembly into the housing (1) make sure the
ventilation slot of the motor assembly is aligned with the ventilation slot
in the housing (1)
Use only manufacturer or authorized distributor supplied spare parts.
Grease the bevel and pinion gears (22 & 30). Lightly coat all parts with
suitable pneumatic tool lubrication oil and reassemble in the reverse
order.
On completing assembly, ensure that all parts are locked tight and the
spindle rotates and the lever throttle. Connect tool to suitable air supply
and operate tool slowly for a few seconds and reset for operation
required. Refer to section on Operation Instructions.
3) Use personal safety equipment.
4) Use only compressed air at the recommended conditions.
5) If the tool appears to malfunction remove from use immediately and
arrange for service and repair.
6) If the tool is used with a balancer or other support device ensure that
it is fixed securely.
7) Always keep hands away from the working attachment fitted to the
tool.
8) The tool is not electrically insulated. Never use the tool if there is any
chance of it coming into contact with live electricity.
9) Always when using the tool adopt a firm footing and/or position and
grip the tool firmly to be able to counteract any forces or reaction forces
that may be generated whilst using the tool.
10) Use only correct spare parts. Do not improvise or make temporary
repairs.
11) Do not lock, tape, wire, etc. the on/off valve in the run position. The
trigger/lever etc. must always be free to return to the ‘off’ position
when it is released.
12) Always shut off the air supply to the tool, and depress the
trigger/lever etc. to exhaust air from the feed hose before fitting,
adjusting or removing the working attachment.
13) Check hose and fittings regularly for wear. Replace if necessary. Do
not carry the tool by its hose and ensure the hand is remote from the
on/off control when carrying the tool with the air supply connected.
14) Take care against entanglement of moving parts of the tool with
clothing, ties, hair, cleaning rags, etc. This will cause the body to be
drawn towards the tool and can be very dangerous.
15) It is expected that users will adopt safe working practices and
observe all relevant legal requirements when installing, using or
maintaining the tool.
16) Do not install the tool unless an easily accessible and easily operable
on/off valve is incorporated in the air supply.
17) Take care that the tool exhaust air does not cause a problem or
blows on another person.
18) Never lay a tool down unless the working attachment has stopped
moving.
19) A grinding wheel should only be fitted by a competent person
trained to do so. The wheel must be of the correct size and speed rating.
20) Check the speed of the grinder at least once per week, if it is in
regular use, with an accurate tachometer.
21) The tool must only be used with the grinding wheels as set out in
section “Foreseen Use of the Tool” and shown on parts list. Never fit any
other device.
22) Carry out the instructions as set out in “Putting into Service”.
23) Many countries have local or national rules re the use and fitting of
grinding wheels. Make sure such rules are observed.
24) Use a barrier to prevent sparks causing a hazard to the operator,
any other person or anything within the vicinity of the sparks.
25) If a wheel guard becomes damaged or has withstood a wheel
breakage, the guard must be changed.
26) Do not use chipped or cracked grinding wheels.
27) Always wear impact resistant eye protection.
28) Use only the disc plate, Item (44) provided with the grinder for
locating and clamping the wheel. Never use substitutes. Use the paper
blotter fixed to the wheel as this ensures even tightness when the wheel
is secured.
29) Tighten the wheel plates sufficiently to prevent wheel spin off when
the grinder is turned off. Do not tighten excessively as this may crack the
wheel.
30) The noise from the tool or the process noise of the grinding
operation may be such that hearing protection should be worn.
31) Avoid inhaling dust from the grinding process. Wearing of a
breathing mask is recommended. Grinder certain materials may mean
that special breathing precautions are necessary. Seek advice before
using the tool.
32) Always ensure that the workpiece is firmly supported so that it
cannot move during the grinding process.
33) If the grinder is dropped do not use unless the wheel is first checked
for damage by a competent person.
34) When not in use the grinder should be stored in a safe place where
it will not be damaged. If a tool has not been used for a period of time
check the tool as for the first time of using.
35) Be aware that if the grinding process causes high vibration, special
precautions should be taken.
36) The operator should be aware that the grinding wheel will continue
