USING SANDING DISCS
Sanding Disc Selection
Use sanding discs and accessories that are:
•correct size as written on tool’s nameplate.
•rated at or above the RPM listed on the tool’s nameplate.
•correct accessory, wheel type and grit for the job. Refer to the table below to select the correct type of sanding disc for your job. Generally, use 24 or 36 grit for heavy stock removal; 50, 60, or 80 grit for medium stock removal and 120 grit for finishing. Always begin with a coarse grit, using successively finer grits to obtain the desired finish. See your MILWAUKEE Electric Tool Catalog for a complete list of sanding discs.
Aluminum Oxide
For fast cutting, general purpose discs for most metal jobs. Best for
Aluminum Zirconia Bi-Cut
Unique grit pattern is arranged in clusters for fast- er stock removal and cleaning. Ideal for removing paint from cars, boats, etc. without clogging.
Ceramic
Lasts up to 3 times longer than Aluminum Ox- ide Discs. For general metal working. Ideal for tough jobs.
Installing Backing Pad and Sanding Discs
1.Remove the battery pack.
2.Wipe the accessories, disc nut and spindle to remove dust and debris. Inspect the parts for damage. Replace if needed.
3.Slip backing pad onto spindle with flat side away from gear case.
4.Place sanding disc on backing pad and secure assembly to spindle with disc nut.
Fig. 9 Disc nut 
Sanding
disc
Backing
pad
Spindle 
5.To tighten, press the spindle lock button while turning disc nut clockwise with the spanner wrench provided.
6.To remove backing pad and sanding disc, remove the battery pack and reverse the pro- cedure.
Sanding
Hold tool at 5° to 15° angle to ensure proper sand- ing pressure and control. Too great an angle will result in too much pressure and could cause exces- sive wear to the disc and workpiece. Too small an angle will reduce control.
Use long, sweeping, side to side strokes, advancing forward to produce the desired finish.
Fig. 10 |
Hold at a |
5° to 15° |
angle |
For best result use only this portion of disc |
Cross Sanding
When finishing a surface that has been prepared by a coarse disc or wheel, sand at right angles to the strokes made by the coarser disc. Finishing marks left from previous sanding are easily seen and removed for a uniform finish. Failure to cross sand when changing from a coarse disc to a finishing disc may result in deep scratches and circular marks.
Removing Welds or Hammer Marks
When removing welds or hammer marks, limit coarse sanding to the immediate area. Use suc- cessively finer grits to smooth surface.
Finishing Metal
Constantly move across the surface. Work faster on curved surfaces where contact areas are smaller and pressure is greater. Flat areas may appear at the end of the stroke when pressure is too heavy. Ease up on pressure at end of each stroke and when reversing strokes.
Troubleshooting
Deep scratches and circular marks can result from:
•Using too coarse a grit
•Using a partially glazed disc
•Dirt or loose metal on the workpiece
•Failure to sand across the grain when changing from coarse to finishing discs
•Failure to use closed coated discs to reduce the problem of grains working loose and scratching the workpiece
Bluish discoloration of metal surface indicates:
•Excessive heat caused by circular motion in a small area
•Excessive pressure
•Use of worn out or glazed discs
MAINTENANCE
WARNING To reduce the risk of injury, always unplug the charger and remove the battery pack from the charger or tool before performing any maintenance. Never disas- semble the tool, battery pack or charger. Contact a MILWAUKEE service facility for ALL repairs.
Maintaining Tool
Keep your tool, battery pack and charger in good repair by adopting a regular maintenance program. After six months to one year, depending on use, return the tool, battery pack and charger to a MILWAUKEE service facility for:
•Lubrication
•Mechanical inspection and cleaning (gears, spindles, bearings, housing, etc.)
•Electrical inspection (battery pack, charger, motor)
•Testing to assure proper mechanical and electrical operation
If the tool does not start or operate at full power with a fully charged battery pack, clean the contacts on the battery pack. If the tool still does not work properly, return the tool, charger and battery pack, to a MILWAUKEE service facility for repairs.
WARNING To reduce the risk of per- sonal injury and damage, never immerse your tool, battery pack or charger in liquid or allow a liquid to flow inside them.
Cleaning
Clean dust and debris from charger and tool vents. Keep tool handles clean, dry and free of oil or grease. Use only mild soap and a damp cloth to clean the tool, battery pack and charger since certain cleaning agents and solvents are harmful to plastics and other insulated parts. Some of these include gasoline, turpentine, lacquer thinner, paint thinner, chlorinated cleaning solvents, ammonia and household deter- gents containing ammonia. Never use flammable or combustible solvents around tools.
Repairs
For repairs, return the tool, battery pack and char- ger to the nearest service center.
ACCESSORIES
WARNING Always remove battery pack before changing or removing accessories. Only use accessories specifically recommend- ed for this tool. Others may be hazardous.
For a complete listing of accessories refer to your MILWAUKEE Electric Tool catalog or go online to www.milwaukeetool.com. To obtain a catalog, contact your local distributor or service center.
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