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A random orbit sander, with disks of various grit sizes. A random orbital sander (also known as a palm sander) is a hand-held power tool which sands in a random-orbit action. That is, in constant irregular overlapping circles. This technology was first commercially utilized in 1968 [citation needed] [1] by Rupes Tools.
The sander smooths it and sends it out the other side. Good for finishing large surfaces. Flap sander or sanding flap wheel: A sanding attachment shaped like a Rolodex and used on a hand-held drill or mounted on a bench grinder for finishing curved surfaces. Orbital sander: A hand-held sander that vibrates in small circles, or "orbits."
An oscillating multi-tool or oscillating saw is a multitool and power tool that oscillates (rather than rotating or reciprocating), powered by battery or mains. The name "multi-tool" is a reference to the many functions that this tool can perform with the range of attachments available.
In 1926, Porter-Cable began to develop a niche in portable electric power tools when Chief Engineer Art Emmons invented the portable electric belt sander, called the Take-About Sander. In 1929, Emmons invented the helical drive circular saw, a compact, lightweight design that is still the most widely used circular saw design produced today.
The belt sander was invented by Eugen Laegler in 1969 out of Güglingen, Germany. 90% of the area can be reached with the belt/drum sander. The remaining 10% left such as edges, corners, under cabinets, and stairs, are sanded by an edge sanding machine. A rotary machine known as a multi disc sander or buffer is then used for the final sanding ...
At the same time, jet engine development had progressed a long way in the six years since the SR.53's initial design. Combined with the fact that improvements in radar had meant that any incoming bomber threat could be detected much earlier, the need for an aircraft like the SR.53 had disappeared, and the project was cancelled on 29 July 1960 ...