Clarke CBG8W Installation and operation manual

8” WETSTONE
BENCH GRINDER
8” WETSTONE
BENCH GRINDER
OPERATING & MAINTENANCE
INSTRUCTIONS 0805

Thank you for purchasing this Clarke Bench Grinder. Before attempting to operate
this bench grinder please read this instruction manual thoroughly and follow all
directions carefully. This is for your own safety and that of others around you, and
to help you achieve long and trouble free service from your bench grinder.
GUARANTEE
This product is guaranteed against faults in manufacture for 12 months from
purchase date. Keep your receipt as proof of purchase.
This guarantee is Invalid if the product has been abused or tampered with in any
way, or not used for the purpose for which it is intended.
The reason for return must be clearly stated.
This guarantee does not affect your statutory rights.
FOR YOUR OWN SAFETY
WARNING! Read these instructions before using the equipment.
• Always wear suitable Clarke safety goggles, manufactured to the latest
European Safety Standards, when Grinding or polishing.
• Do not use the grinder if the guard visor is not in place, or if it is damaged.
• Check that there Is nothing flammable in the working area, as sparks from
the grinder can easily start a fire.
• Disconnect the grinder from the mains supply before changing the grinding
wheel, or topping up the water in the wetstone water bath.
• Never grind on the side face of the wheel. This can cause stresses in the
wheel and lead to the wheel bursting.
• Do not use the grinder if the grinding wheel is damaged or out of balance.
• Keep loose clothing, long hair etc. clear of the grinder. Do not hold the
workpiece with a rag or similar as these can be caught up in the grinder.
Note: Bench grinders used in industrial environments may be subject to the
requirements of The Provision and Use of Work Equipment regulations 1992
(particularly regarding the training requirement of The Abrasive Wheels Regulations
1970), or other legislation. If in doubt seek advice.
TECHNICAL DATA
Model : ................................................ CBG8W
Part No: ................................................ 6500112
Electric motor: .................................... 275 Watts, 240 Volt, Single phase,
Class ‘E’,
Cycle: .................................................. 10mins ON 10mins OFF
Dry wheel (mm): ................................ 150 x20 x12.7 Bore
Wetstone wheel (mm): ...................... 200x40 x20 Bore
2

WARNING! THIS MACHINE MUST BE EARTHED
This product is provided with a standard 13 amp, 230 volt (50Hz). BS 1363 plug, for
connection to a standard, domestic electrical supply. Should the plug need
changing at any time, ensure that a plug of identical specification is used.
IMPORTANT: The wires in the mains lead should be wired up in accordance with
the following colour code:
Green & Yellow - Earth
Blue - Neutral
Brown - Live
As the colours of the wires in the mains lead may not correspond with the coloured
markings identifying the terminals in your plug, proceed as follows:
• Connect the GREEN & YELLOW cord to terminal marked with a letter “E” or
Earth symbol “ ”
• Connect BROWN cord to plug terminal marked letter “L”
• Connect BLUE cord to plug terminal marked letter “N”
We recommend that this machine is connected to the mains supply through a
Residual Current Device (RCD).
FUSE RATING
The fuse in the plug for this appliance must be rated at 13 amps
EXTENSION CABLES
If an extension cable is used, always ensure it is fully unwound. When used outdoors,
ensure the extension cable is specifically designed for outdoor use.
Ensure that the cable is rated for the voltage and amperage of the machine.
IF IN DOUBT, CONSULT A QUALIFIED ELECTRICIAN.
Do not carry out any electrical repair yourself.
3
ELECTRICAL CONNECTIONS

ASSEMBLY AND INSTALLATION
1. Fix the grinder to the bench using suitable screws or bolts through the holes In
the grinder base. Do not overtighten the securing screws.
The grinder has rubber mounting feet to help minimise vibration, and these
will not be effective if compressed too tightly. If using bolts, make sure they will
not work loose under vibration by fitting locknuts or similar.
2. Fit the guard visor as shown in the illustration. Position the visor mounting bracket
to within 1.5mm (1/16") of the wheel.
3. Fit the work rest as shown in the illustration, positioning it to within 1.5mm (11/6")
of the wheel. This will help to prevent the workpiece being dragged between
the wheel and the work rest.
.4. Rotate the wheel by hand to make sure the visor mounting bracket and work
rest are clear of the wheel.
5. Any fault which might lead to fracture in a new grinding wheel is likely to show
in its first minute of operation. Switch the grinder on, stand clear, and allow the
grinder to run for a minute or so before using it for the first time.
4

MAINTENANCE AND REPLACING WHEELS
WARNING Disconnect the grinder from the mains supply before fitting replacement
wheels, cleaning or adjustment.
Keep the machine clean by wiping off dust with a clean cloth, and occasionally
blowing the grinder through with air. Always wear protective goggles when blowing
through with compressed air.
The grinding wheel may need trueing or dressing occasionally. Only dress the
wheel with a proper dressing tool, whilst wearing safety goggles or glasses. If in
doubt seek advice.
Use only correct replacement wheels, of a suitable grade for your intended use.
Check that the spindle speed (no-load speed) marked on the machine does not
exceed the maximum rpm marked on the grinding wheel. Consult your dealer if
in doubt about choosing the correct replacement wheel.
Check replacement wheels thoroughly for any signs of damage before fitting.
Replacement wheels must fit easily, but not loosely, on to the machine spindle.
Do not attempt to fit a wheel that is tight on the spindle. There is a danger of a
tight fitting wheel bursting in use if the spindle expands due to becoming hot.
To replace the grinding wheel: Remove the wheel guard and guard visor (three
nuts and bolts). Unscrew the wheel retaining nut (normal right hand thread), and
remove the flange, blotter, and used wheel. Reassemble as shown in the diagram.
To replace the wetstone wheel: Drain the water bath by removing the plug in the
bottom. Remove the water bath (three screws). Unscrew the wheel retaining nut
(normal right hand thread), flange, and used wheel. Reassemble as shown in the
diagram.
Do not overtighten the wheel retaining nut when reassembling - hand pressure
with a standard spanner is sufficient. There is a danger of damaging the wheel if
the nut Is overtightened.
Switch the grinder on, stand clear, and allow the grinder to run for a minute or so
before using a new wheel for the first time.
Grinding Wheel Wetstone Wheel
5

PARTS DIAGRAM
6

1. Screw HT8481901
2. Washer HT8481902
3. Cover HT8481903
4. Water Trough HT8481904
5, Rubber Cork HT8481905
6. Pin HT8481906
7. Worm Wheel HT8481907
8. Worm HT8481908
9. Both HT8481909
10. Short Axis HT8481910
11. Journal Bearing HT8481911
12. Worm Gear Case HT8481912
13. Big Washer HT8481913
14. Wheel Flange HT8481914
15. Wet Wheel HT8481915
16. Nut HT8481916
17. Left Main Body HT8481917
18. Cable Protector HT8481918
19. Capacitor HT8481919
20. Connecting HT8481920
21. Base HT8481921
22. Rubber Foot HT8481922
23. Switch HT8481923
24. Switch Cover HT8481924
25. Seal Plate HT8481925
26. Earth Connection HT8481926
27. Cable Adaptor HT8481927
28. Rotor HT8481928
29. Cable Washer HT8481929
30. Cable Nut HT8481930
31. Cable HT8481931
32. Middle Main Body HT8481932
33. Stator HT8481933
34. Right Main Body HT8481934
35. Inner Cover HT8481935
36. Knob Nut HT8481936
37. Tool Rest HT8481937
38. Square Neck Screw HT8481938
39. Wheel Flange HT8481939
40. Dry Wheel HT8481940
41. Outer Cover HT8481941
42. Bolt HT8481942
43. Eyeshield HT8481943
44. Eyeshield Bracket HT8481944
45. Spring Washer HT8481945
PARTS LIST
Item Description Part No.
7