5. grinding stOnes
5.1.
MANDATORY SAFETY INSTRUCTIONS (The following instructions must be observed together with chapter 1 ‘Safety’).
▲
DANGER! Use of a damaged stone is dangerous and may cause damage and/or personal injury.
WARNING! Ensure grinder is unplugged from the mains power supply before attempting to change grinding stone.
Only persons qualified under the “Abrasive Wheels Regulations” and holding a current grinding wheel certificate are
authorised to change and dress grinding stones (wheels).
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Grinding stones (wheels) used with this machine must be of an adequate speed rating and suitable for the material to be ground.
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Ensure the grinding stone’s maximum speed specification is higher than that indicated on the machine data plate.
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Check grinding stone is secure, the stone is not worn or damaged and that there are no splits or cracks. If damaged replace
immediately.
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Ensure replacement stone is not damaged in any way such as cracks, deformations or splinters. Also check the mounting flanges
to ensure they are not deformed, burred or chipped. Damaged items must nOt be used as they may cause irregular pressure on the
stone which may cause a stone to break.
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DO NOT
over tighten a stone. never tamper with a stone in order to adapt it to a different size holder.
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Install a new stone as in 5.2. Once mounted on the grinder test the stone before use by facing the grinder in a safe direction (point
away from yourself, others and vulnerable items) and operate for a short time. Dress the stone if necessary.
5.2.
stOne changing prOcedure
WARNING!
Unplug grinder from the mains power supply before changing stone.
5.2.1.
Raise the eye shield up and away from the stone.
5.2.2.
Remove tool rest.
5.2.3.
Remove the screws from the side of the wheel cover and remove the cover.
5.2.4.
Hold grinding stone firmly. To protect your hands use cloth or wear gloves. Unscrew retaining nut (fig 2.1.).
note:
the left side nut has a left hand thread and must be loosened by turning clockwise.
It may be necessary to strike the wrench
sharply in the loosening direction with the heel of your hand to loosen the nut.
5.2.5.
Remove grinding stone washer (fig 2.2), blotter (3), stone (4), 2nd blotter (5), washer (6) from main spindle (7).
5.2.6.
Carefully inspect the new stone before installing to ensure there are no fissures, chips, or cracks.
warning! dO nOt use a damaged stOne.
5.2.7.
Inspect the blotters, if they are damaged replace them. The grinder must never be used
without blotters. Should you not have any available when you need to replace them, cut out
a piece of suitable cardboard the same shape for temporary use only.
5.2.8.
Install the new stone by reversing steps above. Ensure washers (2 & 6) are installed with
the flange on the outside, (i.e. the concave side against the blotter).
5.2.9.
Hold stone steady and secure locking nut.
dO nOt
over tighten as this may crack the stone.
5.2.10. Replace stone cover, re-adjust tool rest to a maximum of 2mm from stone face and tighten
securely.
6.
a
OperatiOn
6.1.
pre-use inspectiOn
warning!
INSPECT THE GRINDER BEFORE OPERATING THE MACHINE. ENSURE THE GRINDER IS UNPLUGGED FROM
THE MAINS POWER BEFORE COMMENCING THE INSPECTION.
6.1.1.
Check the tool rests are securely fixed and are set at a maximum of 2mm from the grinding stone.
6.1.2.
Check that eye shield is in good condition, are secure and that you can see through it clearly.
6.1.3.
Turn the grinding stone by hand and check for any damage. Check that it does not touch the tool rest and is correctly aligned.
6.1.4.
If any of the above checks fail, replace, repair, or adjust as necessary before starting the grinder.
6.2.
stOne use
6.2.1.
Stones have two grades, fine for hard materials and coarse for soft materials.
6.2.2.
When grinding, should surface of the stone become “loaded” (coated with particles of the material being ground) it is probably the
wrong grade of stone for the job.
IMpORTANT:
Grinding stones
MUST ONlY
be assembled by a person holding a grinding wheel certificate. See section 5.
6.3.
using the grinder
warning!
Before commencing work, ensure you have read, understood, and apply the chapter 1 ‘Safety Instructions’.
6.3.1.
Plug grinder into the mains power supply.
6.3.2.
Place the eyeshield in its appropriate safety location.
6.3.3.
Switch the grinder on and bring the workpiece slowly into contact with the spinning stone.
6.3.4.
When using the sanding belt, rest work piece against tool rest and ensure fingers are kept clear of the belt.
6.3.5.
When you have completed your task, unplug the grinder from the mains power supply, and clean the machine ready for next use.
7. maintenance
.
.
Original Language Version
© Jack Sealey limited
fig.2
fig.3
fig.4
BG150BS | Issue:2 (H,F) 10/07/18
