We recently took the opportunity to test out some new pneumatic sanders on the market. If your sanding work requires attention to detail and some fine finishing, take a look at the Rupes Random Orbit Sander. These new pneumatic sanders come in one of three flavors: a 3mm (RH353), a 6mm (RH356), and a 9mm (RH359) orbit.

Another Great Review: Checkout the Graco FinishPro Cordless HVLP Paint Gun

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Why the different orbit diameters? Basically, a larger diameter will help sand down rougher material faster, while the smaller orbit will help with finish work. We used the 9mm model with 40-100 grit paper for 80% of the material, and the 6mm orbit model with 120-220 grit. With our feathering and finishing applications, we switched to the 3mm orbit and 400 grit. These new Rupes random orbit sanders use a 6″ pad and are available with or without dust extraction ports.

The Rupes random orbit sanders demonstrate a smooth start-up and power transfer; we experienced very little vibration in the hand. They all retail for around $300.

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Rupes Random Orbit Sander Fun Facts

• Backing Plate: 150mm – 6in
• Orbit Diameter: 3mm/6mm/9mm
• Working Pressure: 6.2bar – 90PSI
• Air Consumption Max: 340 l/min – 12CFM
• R.P.M.: up to 11,000
• Weight: 2.8kg/6.17lbs
• Spindle Thread: M8 F
• Air Inlet Thread: 1/4″ GAS
• Backing Plate Supplied: 981.500