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9

Selecting the right grade 

of sandpaper

Different grades of sanding paper 

can be purchased from your local 

hardware store. Available grades 

are: Coarse, Medium and Fine.
Use a coarse grit to sand down 

rough finishes, medium grit to 

smooth the work and fine grit to 

finish off.
It is best to make a trial run on a scrap piece of material 

to determine the optimum grades of sandpaper for a 

particular job.

Attaching a sanding sheet

WARNING. 

Always ensure that the tool is switched 

off and the plug is removed from the power point before 

making any adjustments or maintenance procedures.
1. Select the required 

grade of sandpaper.

2. Match the holes in a suitable 

sheet with the holes in the 

base (4) and press the sheet 

to the base to attach it. To 

remove the sheet, peel it 

away from the base.

WARNING.

 Do not continue to 

use the sander with a sanding sheet that is over worn or 

damaged.

WARNING.

 Do not use the same sanding sheet for wood 

and metal. Metal particles become embedded in the 

sandpaper and will scour a wooden surface.

WARNING.

 Take care to regularly clean out the build up of 

dust on the base underneath the sandpaper and not to let 

the sandpaper wear completely down before replacing it. 

Failure to observe these two precautionary measures can 

lead to damage to the hooks and loops on the base and 

the sandpaper will not attach properly. 

Sanding

The sander can be used for 

most sanding operations 

on materials such as wood, 

plastic, metal and painted 

surfaces.

NOTE.

 Wear safety goggles, a 

dust mask and ear defenders.
1. Move the sander over the surface of the work in a 

circular motion with an even, moderate pressure.

CAUTION.

 Where possible, clamp smaller workpieces to the 

bench.

NOTE.

 If there are still scratches on your work after 

sanding, try either of the following:
 2. Go back to a coarser grit and sand the marks out before 

recommencing with the original choice or,

 3. Try using new sandpaper of the same grit to eliminate 

the unwanted marks before 

progressing to a finer grit 

and finishing the job.

Dust extraction

Connect a dust extraction 

system or a household vacuum 

cleaner to the vacuum dust 

extraction adaptor (9).  

GRIT CHART

GRIT

TYPE

60 or less

Very 
Coarse

80 – 100

Coarse

120 – 150

Medium

180 – 220

Fine

240 or more

Very 
Fine

Summary of Contents for SA120

Page 1: ...SA120 050526 ED3 JJ Melbourne Perth Auckland Hong Kong Shanghai Taipei New York Verona London Paris INSTRUCTION MANUAL Detail Sander ...

Page 2: ...fied This warranty does not include damage or defects to the tool caused by or resulting from abuse accidents alterations or commercial or business use It also does not cover any bonus accessories unless the tool is a GMC Platinum Professional model Please ensure that you store your receipt in a safe place Conditions apply to the above warranty If you need direction of what constitutes a free of c...

Page 3: ...one 1300 880 001 in Australia or 0800 445 721 in New Zealand Introduction Your new GMC power tool will more than satisfy your expectations It has been manufactured under stringent GMC Quality Standards to meet superior performance criteria You will find your new tool easy and safe to operate and with proper care it will give you many years of dependable service CAUTION Carefully read through this ...

Page 4: ...utdoor extension cord suitable for outdoor use Use of a cord suitable for outdoor use reduces the risk of electric shock Personal safety Stay alert watch what you are doing and use common sense when operating a power tool Do not use a power tool while you are tired or under the influence of drugs alcohol or medication A moment of inattention while operating power tools may result in serious person...

Page 5: ...ower tool serviced by a qualified repair personnel using only identical replacement parts This will ensure that the safety of the power tool is maintained Additional safety rules for sanders Remove the plug from the socket before carrying out any adjustment servicing or maintenance Fully unwind cable drum extensions to avoid potential overheating When an extension cable is required you must ensure...

Page 6: ...ure that you have removed foreign objects such as nails and screws from the work before commencing sanding Rags cloths cord string and the like should never be left around the work area Wear goggles Wear ear defenders Wear a breathing mask Contents of carton 10 Hook loop detail point sanding sheets 4 x 80G 4 x 100G 2 x 120G 10 Hook loop finger extension sanding sheets 4 x 80G 4 x 100G 2 x 120G Dus...

Page 7: ...w your product 1 Main handle 2 Body 3 On off switch 4 Rotatable base 5 Variable speed control 6 Vacuum dust extraction port 7 Allen key 8 Finger sanding extension 9 Dust extraction adaptor 3 2 6 1 4 5 7 8 9 ...

Page 8: ...adjusted to suit the material being sanded 1 To adjust the speed move the variable speed control 5 until you are satisfied that the speed is what you need for the job in hand Changing and rotating the sanding base 1 Using the allen key remove the 3 outer screws from the existing base and remove the base from the sander You do not need to loosen the centre screw as this controls the movement of the...

Page 9: ...urface WARNING Take care to regularly clean out the build up of dust on the base underneath the sandpaper and not to let the sandpaper wear completely down before replacing it Failure to observe these two precautionary measures can lead to damage to the hooks and loops on the base and the sandpaper will not attach properly Sanding The sander can be used for most sanding operations on materials suc...

Page 10: ... eyes whilst cleaning If the body of the tool needs cleaning wipe it with a soft damp cloth A mild detergent can be used but nothing like alcohol petrol or other cleaning agent Never use caustic agents to clean plastic parts CAUTION Water must never come into contact with the tool Lubricate all moving parts at regular intervals General Inspection Regularly check that all the fixing screws are tigh...

Page 11: ...11 ...

Page 12: ...ce to make suggestions or give comments about any GMC product With continuing product development changes may have occurred which render the product received slightly different to that shown in this instruction manual The manufacturer reserves the right to change specifications without notice Note Specifications may differ from country to country The GMC 777 Helpline operates from 7am to 7pm 7 day...

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