Concrete Surfacing
Operate the tool with a dust extraction system and personal dust protection, e.g. respirator, dust mask, etc. The vacuum used for this application must be approved for the extraction of masonry and concrete dust. Bosch sells suitable vacuum cleaners.
Diamond cup wheels should be carefully selected in order to use the grinder most efficiently. Wheels vary in type of material they are designed to remove and how aggressively they will remove material. The correct wheel to use is determined by the job.
1.Allow the tool to reach full speed before touching the tool to the work surface.
2.Hold the tool with two hands and keep diamond wheel flat on the work surface.
3.Apply minimum pressure, allowing the tool to operate at high speed. Removal rate is greatest when the tool operates at high speed.
4.Continuously move the tool at a moderate speed to avoid creating gouges in the work surface.
5.Remove the tool from work surface before turning tool off. Allow the tool to stop rotating before laying it down.
Tip: For optimal dust collection, all sides of the surfacing dust collection guard must stay in contact with the surface and the surfacing guard must be connected to a vacuum. A dull diamond wheel can be sharpened by briefly surfacing an abrasive material (eg. sand stone).
Sanding
Sanding discs range in grit from 16 (very course) to 180 (very fine). They also vary in size and spacing of grit.
OPEN COAT (type H) is used for soft materials and on paint and varnish, CLOSED COAT (type K) is used for metal, hardwood, stone, marble and other materials. To obtain best results, select sanding discs carefully. Many jobs require the use of several grit sizes and at times both open coat and closed coat discs are required to complete the job. See chart for application examples.
1.Allow the tool to reach full speed before touching the tool to the work surface.
2.Apply minimum pressure to the work surface, allowing the tool to operate at high speed. Sanding rate is greatest when the tool operates at high speed.
3.Maintain a 10° to 15° angle between the tool and work surface, (Fig. 23).
FIG. 23
4.Continuously move the tool at a moderate speed to avoid creating gouges in the work surface.
5.Remove the tool from work surface before turning tool off. Allow the tool to stop rotating before laying it down.
Tips: Guide the disc with crisscross strokes. Do not use a circular motion as this makes swirl marks.
Operation: Refinishing painted wood or metal surfaces.
REMARKS | GRIT | |
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To remove paint and to smooth | Coarse | |
surface irregularities. | ||
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To smooth the rough sanding. | Medium | |
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To remove scratches left by | Fine | |
previous discs. | ||
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To smooth surfaces for painting, | Very Fine | |
polishing or waxing. | ||
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