The Ralli Wolf OS-303 is a dust-free, dual-action orbital sander built for clean, efficient surface finishing in automotive refinishing, woodworking and general fabrication work. Its dust-free design pulls sanding debris away from the work surface as it operates, keeping the workspace cleaner and reducing the amount of airborne dust operators breathe in during extended sanding sessions.

The dual-action mechanism combines rotary and orbital movement, delivering a smoother, more even finish than a purely rotary sander while reducing the risk of visible swirl marks — particularly useful on paint, primer and body filler work where surface finish quality matters. A 5" velcro-type pad allows quick sandpaper changes without adhesives or clips slowing down the job.

Running at 10,000 RPM with a 5mm orbit diameter, the OS-303 is tuned for fine finishing rather than heavy material removal. As with all Ralli Wolf air tools, it requires a compressed air supply at 90 PSI, draws 12 cfm through its 1/4" air inlet and 3/8" hose, and needs oil lubrication for reliable long-term performance. At just 0.9kg, it stays light and manageable through long finishing sessions.

Key Features

Dust-free design keeps debris away from the work surface
Dual-action (rotary + orbital) motion for a smoother, swirl-free finish
5" velcro-type pad for quick sandpaper changes
10,000 RPM free speed with 5mm orbit diameter
Lightweight at 0.9kg for extended handheld use
Suited to fine finishing rather than heavy stock removal

Technical Specification


Model	OS-303
Pad size	5" velcro type
Free speed	10,000 r.p.m.
Air inlet	1/4"
Hose size	3/8"
Air consumption	12 cfm
Orbit diameter	5 mm
Net weight	0.9 kg
Required air pressure	90 PSI
Lubrication	Oil lubrication required
Brand	Ralli Wolf Industries Ltd. (ISO 9001:2015)

Application

Automotive body filler, primer and paint finishing
Woodworking surface sanding and finishing
Fabrication and metal surface preparation
Furniture refinishing and detail work
Any job requiring a clean, dust-controlled sanding process

Ralli Wolf OS-303 Dust Free Dual Action Orbital Sander – 5" Velcro Pad

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