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A rotary reciprocating saw is a type of saw that spins a cutting implement around a rotary axis, instead of thrusting it along a linear axis. The first use of such devices was in medicine , where cutting through bone warranted the need for a saw with minimal stroke length, and a cutting action that could be implemented through depth cut rather ...
Note that for the automotive/hotrod use-case the most convenient (used by enthusiasts) unit of length for the piston-rod-crank geometry is the inch, with typical dimensions being 6" (inch) rod length and 2" (inch) crank radius. This article uses units of inch (") for position, velocity and acceleration, as shown in the graphs above.
With all in-line slider-crank mechanisms, the stroke is twice the length of the crank arm. Therefore, given the stroke, the length of the crank arm can be determined. This relationship is represented as: L 2 = (ΔR 4) max ÷ 2. Once L 2 is found, the follower length (L 3) can be determined. However, because the stroke of the mechanism only ...
The distance between the axis of the crankpins and the axis of the crankshaft determines the stroke length of the engine. [1] Most modern car engines are classified as "over square" or short-stroke, [citation needed] wherein the stroke is less than the diameter of the cylinder bore. A common way to increase the low-RPM torque of an engine is to ...
Rotary reciprocating saw – Type of mechanical saw; Agitation – Device or mechanism which shakes or stirs something; Scotch yoke – Mechanism to convert between rotational and reciprocating motion; Crank – Simple machine transferring motion to or from a rotating shaft at a distance from the centreline; Crankshaft – Mechanism for ...
An engine is described as oversquare or short-stroke if its cylinders have a greater bore diameter than its stroke length, giving a bore/stroke ratio greater than 1:1. An oversquare engine allows for more and larger valves in the head of the cylinder, higher possible rpm by lowering maximum piston speed, and lower crank stress due to the lower ...
A reciprocating saw is a type of handheld, small, machine-powered saw, in which the cutting action is achieved through a push-and-pull ("reciprocating") or back-and-forth motion of the blade. The original trade name, Sawzall , is often used in the United States , where Milwaukee Electric Tool first produced a tool of this type in 1951.
The mean piston speed is the average speed of the piston in a reciprocating engine. It is a function of stroke and RPM. There is a factor of 2 in the equation to account for one stroke to occur in 1/2 of a crank revolution (or alternatively: two strokes per one crank revolution) and a '60' to convert seconds from minutes in the RPM term.