Rupes 2" Air-Powered Mini Random Orbital Sander/Polisher

Rupes 2" Air-Powered Mini Random Orbital Sander/Polisher

Rupes 2" Air-Powered Mini Random Orbital Sander/Polisher

Rupes 2" Air-Powered Mini Random Orbital Sander/Polisher
The Rupes TA50 2" Random Orbital Sander includes a 2" hook-style backing plate.To properly tighten or loosen the backing plate on the Rupes TA50 2" Random Orbital Sander, locate the slot that is cut into black collar just above the backing plate (as shown).  Grasp the backing plate and rotate it until a hex plug and a hole is visible through the slot.  Place an allen wrench or other tool into the hole and slowly rotate the backing plate until a second hole lines up (you'll know when it lines up because your wrench will drop into the 2nd hole).  The inner shaft will no longer be able to rotate, which will allow proper tightening or loosening of the backing plate.The Rupes TA50 2" Random Orbital Sander is compact, light, & powerful.The Rupes TA50 2" Random Orbital Sander is just one of several high-powered and specialized pneumatic tools offered by Rupes.  We regularly stock all of the tools shown.  Outfit your Rupes TA50 2" Random Orbital Sander with a variety of polishing pads.  Although it is not recommended for use as a polisher, every TA50 I've sold was purchased primarily as a polishing tool. So far, no failures! Order the optional 8-Piece Pad Set with your machine (2 of each pad), and save 15% on the pads.This ultra low-profile 2" Extra-Cut Microfiber Disc looks innocent enough, but make no mistake: It'll turn your Rupes TA50 Pneumatic Random Orbital Sander into a swirl killing, ridge-leveling beast! The typical intermediate foam core has been eliminated, which minimizes motion-robbing cushioning (super important when using these small stroke machines for the purpose of heavy cutting or leveling).The 2" maroon foam cutting pad is a stout performer.  Its foam is more dense than its yellow polishing counterpart.  Although it is designated as a cutting pad, it typically leaves a very nice finish.The 2" yellow foam polishing pad is a very versatile pad. It can be used with compounds featuring micro abrasives, and of course excels when used to apply polishes, waxes, and sealants. Its foam is more dense than its black final-polishing counterpart. A great pad for polishing delicate metals, finicky plastics, and pretty much any surface that needs polishing.The 2" black foam finishing pad is a soft and cushiony pad. It is best used for applying fine polishes, waxes, and sealants.
Click to enlarge image(s)
The Rupes TA50 Mini Random Orbital Sander/Polisher touts a spec sheet reminiscent of an F1 racing engine!  Random orbital machines have been around for decades, but this little jewel is small, lightweight, and spins its backing plate lightning-fast (up to 15,000 RPM!) 

   Little Taz dances the Two-step.
The Rupes TA50 (nicknamed Little Taz, in reference to the Tasmanian Devil) creates two separate motions, that combine to deliver fantastic sanding & polishing results.  "How does it work?" I'll attempt to explain.

If you were to grab ahold of the TA50'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 TA50, its motor force-drives the backing plate along a tiny orbital path.  Dynamic factors including speed, pressure, friction, bearing load, and orbit size combine to determine the frequency and direction of backing plate rotation.

The TA50's random orbital motion greatly minimizes clogging of the sanding disc, especially when compared to rotary or orbital-action machines. Should any unfortunate scouring of the surface occur, you'll be hard pressed to see a consistent sanding pattern.

   The Rupes TA50 is a sander and a polisher!
Initially, Rupes recommended that the TA50 not be used as a polisher. Marco the engineer claimed, "The gears are not built for it!" Regardless, we were the first to go out on a limb, touting the TA50 as a polisher. Since then, we've sold untold amounts of TA50's, without reports of a single failure. Note: The TA50 is now listed on the Rupes website as a dual-purpose machine.

The TA50 is utterly capable of being used to polish small parts, door pillars, body trim pieces, headlights, engine parts (and on and on and on). To minimize absorption of the machine's random orbit-action, we recommend that you utilize very thin, lightweight buffing pads. We offer four varieties of pads, perfectly suited for use with the TA50. 

   What speed setting should be used for when sanding with the TA50?
In general, it is not necessary nor desirable to use vision-blurring speeds. This little dynamo tops out at whopping fifteen-thousand RPM, which is way too much speed for most situations. Luckily, the TA50 delivers an impressive amount of random backing plate rotation, even at very low speeds. If too much speed is used, you're certain to blow through untold quantites of sanding discs because the abrasive particles that accomplish all the work will break away from the disc.

To extend the life of the sanding disc (and deliver a superior sanding result), use a low rather than high operating speed. The ideal speed setting is one that allows the disc to travel smoothly across the sanding surface, all the while delivering at least some random rotation of the backing plate. If too little speed is used, the sanding disc will grab or grip the sanding surface. This will cause the machine to steer your hand in varying directions. Avoid this potentially damaging situation by initially using a low speed setting. Then, gradually adjust machine speed up, until the disc is gliding along smoothly.

Next, bump the machine speed up until there is at least some random rotation of the backing plate. In general, anywhere from a half turn to a few turns per second of the plate is sufficient. To gauge backing plate rotation, place a contrasting line or dot onto the edge of the backing plate. 

Warning: bad things can happen rapidly when using high operating speeds (15,000 RPM = 250 RPM per second),  so it's important to use only enough pressure to keep the disc or pad planted against the surface, and only enough machine speed to keep the backing plate rotating.  Excessive pressure will overstress the machine's gears & bearings, while too much speed will inevitably demolish sanding discs and buffing pads.

   Which sanding discs work best with the Rupes TA50?
Currently, no major manufacturer we know of produces a two-inch diameter sanding disc.
Luckily, it's relatively simple to make them yourself, using a typical arch punch.
09-03-2015 Note: We plan to offer 2" sanding discs in several varieties... soon!

   Outfit the Rupes TA50 with an assortment of buffing pads.
Our 2-1/8" buffing pads were expressly made for use with the TA50.  We offer four varieties of pads, all of which have been optimized for use with this wonderfully capable tool. Buy the pads individually here, or in an 8-Piece Starter Pack (see photos for in-depth descriptions). Two each of the following pads are included in the set:

// 2" Extra-Cut Microfiber Disc - pair
Ultra-low profile features tremendous cutting capability

// 2" Maroon Foam Cutting Pad - pair
Designed for cutting, but leaves a haze-free finish

// 2" Yellow Foam Polishing Pad - pair
Versatile, use for polishing or waxing

// 2" Black Foam Finishing Pad - pair
Delivers the ultimate in clarity, super-soft and contourable

   Add a spare backing plate.
Better to be safe than sorry! Having a spare backing plate on hand is always smart. The Rupes 9P01.046 2" Backing Plate is a direct replacement for the factory installed unit. This backing plate is not all that common in the USA... so plan ahead! (regularly $22.14, save 15%)

   Looking for a bigger air-powered random orbital polisher?  
Check out the Rupes BigFoot LHR75 3" Mini Random Orbital Polisher.

   Looking for an air-powered de-nibbing tool?
Check out the Rupes LD30 30mm Orbital De-Nibber.

Specifications & Notes:
Motor specifications:
Pneumatic, power rating not known

Speed settings:
Variable @ 0 R.P.M - 15,000 R.P.M.

Stroke size:
1.5mm offset, creates a 3mm orbit diameter

Machine type:
Random Orbital Polisher aka Dual Action

Action 1:
Shaft drive rotates a free-spinning backing plate spindle, creating a circular path measuring 15mm in diameter

Action 2:
Backing plate free-spins and can rotate in either direction.

Backing plate: #9P01.046
2" (50mm) 6mm x 1.0mm mounting stud

Spindle mounting hole:
6mm x 1.0mm female thread

Air requirements:
bar 6 / 88 PSI approximate

330 liters / 87GPM / 11.7 CFM

Tool includes:
#9P03.060 In-line Air Regulator
#9P31.038 40" Air Inlet Hose (with fittings)
Size: 6-5/8" L x 1-1/2" W x 2-3/4"H

Length is 8-1/2" with air regulator installed
Width is 2" with backing plate installed
Height is 3-1/8" with backing plate installed

1 lb. 5 oz. approximate