Rupes Skorpio 6" Air-Powered Random Orbital Palm Sander

















Rupes Skorpio 6" Air-Powered Random Orbital Palm Sander

Rupes Skorpio 6" Air-Powered Random Orbital Palm Sander

Rupes Skorpio 6" Air-Powered Random Orbital Palm Sander
Skorpio Random Orbital Palm Sanders are available vacuum-ready!Skorpio Random Orbital Palm Sanders are ergonomically designed.  A patented palm lever ensures superb comfort and controllability.  High-grade bearings and a powerful, efficient motor enable the Skorpio to run trouble-free.  A multi-stage muffler deadens harsh exhaust noise, making the Skorpio one of the quietest palm sanders available today.Clean lines, comfortable to use.Vacuum ready.Skorpio is available is four orbit ø variations: 3mm / 6mm / 9mm / 12mmThe Rupes 981.320 is a direct replacement for the factory-installed Skorpio backing plate.The Rupes 981.460 6" Interface Pad is very thin, measuring only 1/4" in height.  It will only minimally absorb machine motion, making it a perfect choice for use with short stroke machines.The Mirka 1066F 6" Interface Pad is an agile-feeling interface pad, and will work well with all types of discs.  Overall height is 3/8".The Mirka 1066 6" Interface Pad is a great, all-around interface pad that will work well with all types of discs.  Overall height is 1/2".The Mirka 1066SF 6" Interface Pad is 3/4" tall, allowing attached sanding discs to conform to all sorts of surfaces.  When used with short-stroke machines, it may hinder sanding performance by absorbing much of the machine's motion. The Meguiar's S6FI 6" Interface Pad is very long lasting and super resilient.  It was designed specifically for use with Meguiar's Unigrit Discs, but works well with all types of discs.  Overall height is 1/2".The Mirka 9166 6" Interface Pad is made specifically for use with Mirka net mesh sanding discs, but it works well with all types of discs.  Overall height is 1/2".
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Skorpio's® sanding motion is smooth as lotion!
Rupes® 6" Skorpio Palm Sanders feel righteous.  Ergonomic design characteristics combine with supreme engineering to deliver confidence-inspiring balance and control.  Regardless your experience level or the sanding task, Rupes has an air-powered Skorpio Palm Sander that is right for you!

The Skorpio is a random orbital sander.
Skorpio Palm Sanders create two independent backing plate motions that work simultaneously to create a suberb sanding result.  Machines that carry a random orbital designation have been around for decades, and are typically used to refinish just about anything in need of sanding or polishing.

Orbital action enables Skorpio to sand thoroughly and consistently.
Skorpio's backing plate moves in an orbital pattern that would be similar to the movement of your hand, if you happened to be brushing your teeth using tight and consistent circular motions.  An adjustable speed lever controls the
quantity of orbits created by the Skorpio.  Some Skorpio Palm Sanders can
create up to 11,500 orbits per minute (commonly referred to as OPM).

While orbiting, Skorpio's backing plate is able to spin clockwise or counterclockwise... at a random rate!
Random rotation of the backing plate ensures that no discernable circular patterns will be visible across the sanded surface. Skorpio's dual action design (random rotation of the backing plate + motor-driven orbital action) create a finish that is hard to duplicate via hand sanding, orbital-action, or direct-drive rotary machine.  Skorpio Palm Sanders feature an anti-spinning feature that impedes excessive backing plate rotation by using brake-action (the rubber shroud that covers the counterbalance assembly directly contacts the top of the backing plate).

How does a random orbital palm sander "work"?
If you were to grab ahold of the Skorpio's backing plate and give it a flick in either direction, the backing plate would free-spin, eventually coming to rest. The backing plate is able to rotate freely and at a random rate because it is bolted into a bearing-mounted spindle. As you fire up the Skorpio, its motor force-drives the backing plate along an orbital path. Dynamic factors including speed, pressure, friction, bearing load, and orbit size combine to determine the frequency and direction of backing plate rotation.

Skorpio Palm Sanders are available in four stroke variations.
In order for the backing plate to move along an orbital path, its mounting pad is placed off-center in relation to the machine's driveshaft.  This distance is typically measured in millimeters or inch-fractions.  Therefore, a machine that features an offset of 3mm creates an orbit diameter of 6mm.  Skorpio sanders are available in 3mm, 6mm, 9mm, and 12mm stroke diameters.

"Which stroke diameter should I use?"
This is a commonly asked question, and for good reason. Frankly, there isn't a whole lot of specific information relating to this topic (only generalized advice). While short stroke machines have traditionally been recommended for tasks requiring the use of very fine sanding discs (and large stroke machines for coarse sanding discs), my research and testing indicates this to be a huge misconception.  If you're still unsure of which offset would be ideal for your sanding task, do not hesitiate to call or e-mail us for a recommendation.

  In general:  

A machine featuring a small stroke confines its sanding to an area smaller than that of a large stroke machine. Additionally, since there is less lateral motion of the backing plate, it can more readily fit into tight or confined areas. There are several obvious and not so obvious advantages to using a small stroke machine.

A machine featuring a large stroke will typically generate more backing plate rotation than an identically prepared small stroke machine. Although increased rotation can increase cutting speed, it may also create longer scratches atop the sanding surface if the sanding disc is loaded with debris. Further, if the machine is inadvertently or aggressively tilted during use, a large stroke machine can create deeper gouging atop the sanding surface.  Large stroke machines will also sand a larger area per orbit; however, sanding along the outlying areas will not be as thorough as the area directly below the machine.

Use a 3mm diameter stroke machine:
• For fine-grade sanding, as recommended by Rupes (P320-P5000)
• For sanding of items that do not allow the entire disc to remain in contact with
   the sanding surface
• On delicate items that cannot handle vigorous movement of the backing plate
• In confined areas, or on parts that will not physically allow the use of a machine
  with a medium or large stroke (in reference to backing plate movement)
• When high-speed rotation of the backing plate is not desirable

Use a 6mm diameter stroke machine:
• For medium-grade sanding, as recommended by Rupes (P100-P320)
• For most sanding duties (this is the most popular stroke size for 6" discs) 
• On items or parts that can handle somewhat vigorous movement of the backing plate
• On areas that will physically allow the use of a machine with a medium stroke
  (in reference to backing plate movement)
• If you plan on using the machine as a polisher (outfitted with very thin buffing pads)
• If you desire more rotation of the backing plate than a 3/32" machine can deliver

Use a 9mm diameter stroke machine:
• For coarse or aggressive sanding, as recommended by Rupes (P60-120)
• On items or parts that can handle vigorous movement of the backing plate 
• On areas that will physically allow the use of a machine with a large stroke
  (in reference to backing plate movement)
• If you plan on using the machine as a polisher (outfitted with thin buffing pads)
• If you desire substantial rotation of the backing plate
• If all the above applies, and you understand the benefits of using a large stroke machine

Use a 12mm diameter stroke machine:  (July 06, 2016: this stroke is currently unavailable) 
• For extra-coarse or very agressive sanding
• On items or parts that can handle very vigorous movement of the backing plate 
• On areas that will physically allow the use of a machine with a super-large stroke
  (in reference to backing plate movement)
• If you plan on using the machine as a polisher (outfitted with string or foam buffing pads)
• If you desire maximum rotation of the backing plate
• If all the above applies, and you understand the benefits of using a large stroke machine
• For superb cutting and finishing (masterful control of the machine is required to achieve
   superior results when finish sanding or polishing with this model; otherwise, severe scouring
   pig-tailing, or gouging of the sanding surface may occur)

Still not sure which machine suits your needs, or want to learn more about stroke diameter?
Read about stroke diameter here.  You can also e-mail or call us for a recommendation.

For more technical information, see the Specifications Section listed below.

 OPTION 1:  Add a spare backing plate, save 15%. 
Better to be safe than sorry!  Having a spare backing plate on hand is always smart.  The Rupes 981.320 6" Velcro Backing Plate is a direct replacement for the factory installed unit.  Also available: Rupes 981.145 6" Vinyl Backing Plate.

 OPTION 2:  Add an interface pad, save 15%. 
By placing an interface pad between the sanding disc and backing plate, sanding discs will more easily conform to curved or complex surfaces.  Should you inadvertently add excessive tilt to the machine during use, an interface pad will help to better distribute pressure across the entire face of the disc. 981.460 | 1066F | 1066 | 1066SF9166
Specifications & Notes:
  • Stroke size (rounded):
      3mm (7/64")
      6mm (15/64")
      9mm (23/64")
    12mm (15/32")

  • Maximum orbit speed:
      3mm = 11.5k
      6mm = 10.5k
      9mm =  9.5k
    12mm =  9.5k

  • Air consumption:
      3mm = 12.0 cfm (340 liters / 90 gpm)
      6mm = 12.7 cfm (360 liters / 95.1 gpm)
      9mm = 13.0 cfm (370 liters / 97.8 gpm)
    12mm = 16.3 cfm (460 liters / 121.5 gpm)
  • Machine weight (inc. backing plate):
      3mm - 1.68 pounds (760 grams)
      6mm - 1.70 pounds (770 grams)
      9mm - 1.75 pounds (795 grams)
    12mm - 1.85 pounds (839 grams)

  • Backing plate diameter:
    5-7/8" (149.225 mm)

  • Backing plate thread:
    8mm through hole - use 8mm bolt

  • Recommended air pressure:
    90 PSI (6.2 Bar)

  • Sound level: 78 dBa