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  2. Bore (engine) - Wikipedia

    en.wikipedia.org/wiki/Bore_(engine)

    The bore diameter is frequently increased to the limit of minimal wall thickness, the water passage is eliminated between each pair of adjacent cylinders, the deck height is increased to accommodate a longer stroke, etc. but in general if the bore pitch is the same, the engines are related.

  3. Engine displacement - Wikipedia

    en.wikipedia.org/wiki/Engine_displacement

    Engine displacement is the measure of the cylinder volume swept by all of the pistons of a piston engine, excluding the combustion chambers. [1] It is commonly used as an expression of an engine's size, and by extension as an indicator of the power (through mean effective pressure and rotational speed ) an engine might be capable of producing ...

  4. Roundness - Wikipedia

    en.wikipedia.org/wiki/Roundness

    Having a constant diameter, measured at varying angles around the shape, is often considered to be a simple measurement of roundness.This is misleading. [3]Although constant diameter is a necessary condition for roundness, it is not a sufficient condition for roundness: shapes exist that have constant diameter but are far from round.

  5. Diameter tape - Wikipedia

    en.wikipedia.org/wiki/Diameter_tape

    A diameter tape (D-tape) is a measuring tape used to estimate the diameter of a cylinder object, typically the stem of a tree or pipe. A diameter tape has either metric or imperial measurements reduced by the value of π. This means the tape measures the diameter of the object. It is assumed that the cylinder object is a perfect circle.

  6. Bore gauge - Wikipedia

    en.wikipedia.org/wiki/Bore_gauge

    If you want to measure the diameter set the gauges required diameter with master. [clarify] In order to measure the diameter of the bore, place the beam at one end and slide the other end on the diameter and watch the dial indicator. The values initially increases and at one point starts decreasing; stop that point, it is called max point on ...

  7. Sphericity - Wikipedia

    en.wikipedia.org/wiki/Sphericity

    Sphericity is a measure of how closely the shape of an object resembles that of a perfect sphere. For example, the sphericity of the balls inside a ball bearing determines the quality of the bearing, such as the load it can bear or the speed at which it can turn without failing. Sphericity is a specific example of a compactness measure of a shape.

  8. Stroke ratio - Wikipedia

    en.wikipedia.org/wiki/Stroke_ratio

    An engine is described as undersquare or long-stroke if its cylinders have a smaller bore (width, diameter) than its stroke (length of piston travel) - giving a ratio value of less than 1:1. At a given engine speed, a longer stroke increases engine friction and increases stress on the crankshaft due to the higher peak piston acceleration.

  9. Cylinder - Wikipedia

    en.wikipedia.org/wiki/Cylinder

    The bare term cylinder often refers to a solid cylinder with circular ends perpendicular to the axis, that is, a right circular cylinder, as shown in the figure. The cylindrical surface without the ends is called an open cylinder. The formulae for the surface area and the volume of a right circular cylinder have been known from early antiquity.

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