Tool Tips, Maintenance | Bosch Power Tools 1250DEVS guide

BM 2609932224 07-09:BM 2609932224 07-09 7/30/09 8:22 AM Page 9

Tool Tips

SANDING: open-coat aluminum oxide sanding discs are recommended for most wood or metal sanding applications, as this synthetic material cuts quickly and wears well. Some applications, such as plastics, glass, or stone require silicon carbide discs, which have a very sharp cutting edge. For best results, use Bosch sanding and polishing accessories which are of superior quality and are carefully selected to produce professional quality results with your sander.

With the workpiece firmly secured, depress switch while applying the pad to the work surface. DO NOT apply excessive pressure as this will slow the pad action, and DO NOT start the tool and bring it up to speed before applying to the work; swirl marks will result in either case. In general, higher speeds and moderate pressure will give the best results. If faster removal is desired, DO NOT INCREASE PRESSURE ON THE TOOL; use a coarser grade of abrasive. Move the sander in long sweeping strokes, parallel to the grain using some lateral motion to overlap the strokes by as much as 75%. The random orbit action allows cross-grain sanding, but be careful not to tilt the sander near edges, or undesirable rounding may result.

If the surface is rough, begin with coarser grits and then complete the surfacing with medium and fine abrasives. Because the random orbit action is so effective, it is often possible to begin sanding with a medium grit disc and go directly to fine finishing. To avoid uneven results, do not skip more than one grit size when going from coarser to finer, and do not sand in one area for too long. When the job is completed, release switch, and gently lift the tool from the work surface at the same time.

POLISHING: for most polishing, the extra soft backing pad will give the best results. The random orbit sander may be fitted with a foam buffing pad or sponge applicator pad (optional accessories) to polish or remove scratches from painted or finished surfaces, plastics, and even glass. The tool is operated in much the same way as when sanding, but the following points should be observed;

Apply the compound to the surface, and use the sponge applicator pad with light pressure and a circular motion to remove scratches and restore weathered finishes. Use only as much compound as necessary, and clean the sponge frequently during use.

When initial polishing is completed, wipe away any excess compound with a soft towel, and then polish the surface to its final finish with the buffing pad. Use smooth overlapping strokes for best results.

It is important to note that the orbit speed of the random orbit sander is not the same as the RPM of a standard right-angle polisher. The random orbit action is much like a powerful hand polishing action, and therefore does not have the high speeds at the edge of the pad which can burn the work surface. For this reason, it is possible to select a higher OPM for the random orbit sander than the recommended RPM for a standard polisher. Practice on a hidden area or test surface until you have determined the tool is suitable for your polishing application.

Clean the buffing pad and sponge applicator pad with mild detergents and warm water. DO NOT use solvents.

Maintenance

Service

Preventive maintenance

!WARNING performed by unauthorized personnel may result in misplacing of internal wires and components which could cause serious hazard. We recommend that all tool service be performed

by a Bosch Factory Service Center or Autho- rized Bosch Service Station.

TOOL LUBRICATION

Your Bosch tool has been properly lubricated and is ready to use. It is recommended that tools with gears be regreased with a special gear lubricant at every brush change.

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