The height of the keyseat itself is not dimensioned because, once the top of the shaft is cut away, there is no feature left to measure.

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Oct 29, 2019 — Turning insert shape ... ​The insert shape should be selected relative to the entering angle accessibility required of the tool. The largest ...

Note that all these break lines were designed for preparing drawings in the old-fashioned manner by using a draft board. Sometimes engineers and designers still work on drawings with pencils and rulers. However, modern 3D CAD software, which prevails in our days, can offer other line types for the break lines in the computer-based drawings.

The special thick break lines shown for cylindrical and tubular parts are useful when an end view is not shown, but otherwise the thick freehand break line is adequate.

Machine taps are basically single cut taps and cut the thread in one work process. Since the drill is aligned vertically to the workpiece in the machine, it ...

Once the shape of a part is defined with an orthographic drawing (i.e., in projections), the size information is added in the form of dimensions.

2019328 — Most standard square endmills have at least a .002 corner radius. This gives the cutting edge more strength as if it was perfectly sharp/square the edge would ...

Dimensions can be placed in parallel or in series, but in all cases, they should be related to the base (datum) surface.

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If the view is overcrowded with different dimensions, two and more separate drawings with the same view can be produced.

The thin line with freehand zig-zags is recom­mended for long breaks and may be used for solid details or for assemblies containing open space.

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Each line should have one of the two thicknesses, thick or thin, and the ratio of the thicknesses must be not less than 2:1. In many textbooks (especially, of the US authors) you will come across the thicknesses of lines: 0.3 mm and 0.6 mm. In general cases it is good enough in practical work.

(a) by the angle; (b) as a ratio combined with the slope symbol; (c) by the dimensions showing the difference in the heights of two points from the base line and the distance between them; (d) by the slope symbol, the base line length and the slope height.

The minimum space between parallel lines should never be less than twice the thickness of the heaviest line. It is recommended that these spaces be 0.7 mm or greater.

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The aligned method (where text is placed parallel to the dimension line) may be seen on older drawings or on architectural drawings but is not approved by the current ANSI standard.

Alternatively, gears and splines may be shown with a solid line representing the basic outline of the part, and a lighter line representing the root of the teeth.

In cases where other than shown types of lines are used for special drawings (for example, electrical drawings, pipeline diagrams, or building drawings) the conventions adopted must be clearly indicated by reference to specific standards or by notes on the drawings.

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For all views of one piece or assembly to the same scale, the thickness of the lines should be the same. Medium and extra-thick lines should be used only in special cases.

In Graphics Communication practice there is the whole collection of different lines, which are used for drawing purposes.

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Normally, gear drawings include a table of information, called cutting data, for manufacturing. A detail drawing of a gear would also include other dimensions not found in the table (root diameter, bore diameter, keyway dimensions).

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An “X” is sometimes used to indicate “BY” between coordinate dimensions specified in note form. A half space is left in this case between the “X” and the dimensions.

In end views of circular features the point of intersection of two centre lines should be shown by two intersecting short dashes, except for very small circles, as shown:

Insert Code · 1. | Insert shape. Key, Included angle, Shape. C · 2. | Normal clearance. Key, Normal clearance. C · 3. | Tolerance class. Key, Inscribed circle ...

To avoid repeating the same dimension or to avoid long leader lines, we may use reference letters in conjunction with an explanatory table or note.

All dimensions and note text must be oriented to read from the bottom of the drawing. This is called unidirectional dimensioning.

A gear is a toothed-wheel mechanical device used to transit power and motion between machine parts. Typically a shaft is used to both apply and receive power from the gears.

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The alphabet of lines is a set of standard line types established by the American National Standards Institute (ANSI) for technical drawing. The alphabet of lines and the approximate dimensions used to create different line types, are referred to as linestyles when used with CAD.

Break Line are used to shorten the view of long uniform or tapered sections, or when only a partial view is necessary, and are used on both detail and assembly drawings.

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Extension lines should not cross dimension lines, and they should avoid crossing other extension lines whenever possible. When extension lines cross object lines or other extension lines, they should not be broken. When extension lines cross or are close to arrowheads, they should be broken for the arrowhead.

Nickel is a silvery-white metal. It has the shiny surface common to most metals and is both ductile and malleable.

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