Blanks - ans 1803220415Sl. No.Page Soft Page __ of 227Q&A's1517Feature is general term applied to a physical portion of a part, such as a surface, pin, tab, hole, or slot.2921Decimal dimensioning shall be used on drawings31527Fully roundeds ends / slots holes end radii are indicated but not dimensioned41022Decimal points are placed in line with the bottom of the associated digits51022Decimal points must be uniform, dense, and large enough to be clearly visible and meet the reproduction requirements of ASME Y14.2M.62234Repetitive features or dimensions may be specified by X in conjunction with a numeral to indicate the number of places required7719_________ is a constant boundary generated by the collective effects of a size features specified MMC or LMC material condition and the geometric tolerance for that material condition.82032Rods and Tubing are dimensioned by specifying the straight lengths, bend radii, angles of bend, and angles of twist for all portions of the item.9214Outer Boundary is a worst case boundary (that is, locus) generated by the largest feature (LMC for an internal feature and MMC for an external feature) plus the geometric tolerance and any additional geometric tolerance (if applicable) from the features departure from its specified material condition10719Resultant Condition is a variable boundary generated by the collective effects of a size features specified MMC or LMC material condition, the geometric tolerance for that material condition, the size tolerance, and the additional geometric tolerance derived from the features departure from its specified material condition.111931Key Seats are dimensioned by width, depth, location, and if required, length.12214Inner Boundary is a worst case boundary (that is, locus) generated by the smallest feature (MMC for an internal feature and LMC for an external feature) minus the stated geometric tolerance and any additional geometric tolerance (if applicable) from the features departure from its specified material condition131224A Leader is used to direct a dimension, note, or symbol to the intended place on the drawing14820A 90 applies where center lines of features in a pattern or surfaces shown at right angles on the drawing are located or defined by basic dimensions and no angle is specified.151628A curved outline composed of two or more arcs is dimensioned by giving the radii of all arcs and locating the necessary centers with coordinate dimensions. Other radii are located on the basis of their points of tangency.161931A note may be used to specify 45 chamfer172335An X may be used to indicate "by" between coordinate dimensions18113Any reference to gaging in ASME Y14.5M is included for explanatory purposes only191325Dimensions are usually placed outside the outline of a view.201729For counterdrilled holes, the diameter and depth of the counterdrill are specified.211729For countersink holes, the diameter and included angle of the countersink are specified.221527For features with partially rounded ends, the radii are dimensioned231022For information on conversion and rounding of U.S. customary linear units, see IEEE / ASTM SI 10.242032For information on inch knurling, see ANSI / ASME B94.6 Standard251729If no depth or remaining thickness of material is specified, the spotface is the minimum depth necessary to cleanup the surface to the specified diameter.261628Irregular outlines may be dimensioned (Circular or noncircular outlines) by the rectangular coordinate or offset method272032It is important that the toleranced diameter of the feature before knurling.282032Methods of specifying and dimensioning screw threads are covered in ASME Y14.62918MERROR:#VALUE!1994 Standard Question - Methods of specifying gear requirements are covered in the ASME Y 14.7 series of standards. - 1994 Standard Question302032Methods of specifying involute spline requirements are covered in the ANSI B92 series of standards.312032Methods of specifying requirements peculiar to castings and forgings are covered in ASME Y14.8.322032Methods of specifying surface texture requirements are covered in ASME Y14.36M.33113Notes from ASME Y14.5M 1994 in capital letters are intended to appear on drawings.341224Notes should be placed to read from the bottom of the drawing with regard to the orientation of the drawing format.352032Rods and tubing are dimensioned in three coordinate directions and toleranced using geometric principles.36820SI linear unit used on engineering drawings is the millimter.371729Specifying the included angle of the counterdrill is optional381628The depth dimension of a blind hole is the depth of the full diameter from the outer surface of the part391931The depth of the key seat is dimensioned from the Opposite side of the shaft or hole.401022The space between succeeding parallel dimension lines should be not less than 6 mm.411022The space between the first dimension line and the part outline should be not less than 10 mm.42820U.S. customary linear unit used on engineering drawings is the decimal inch.431729Where a hole is chamfered or countersunk on a curved surface, the diameter specified on the drawing applies at the minimum diamter of the chamfer or countersink441527Where a part has a number of radii of the same dimension, a note may be used instead of dimensioning each radius separately.451123Where a point is located by extension lines only, the extension line from surfaces should pass through the point461426Where a radius is dimensioned in a view that does not show the true shape of the radius, TRUE is added before the radius dimension471527Where a spherical surface is dimensioned by a radius, the radius dimension is preceded by the symbol SR.481931Where an angle and a linear dimension are specified, the linear dimension is the distance from the indicated surface of the part to the start of the chamfer491527Where corners are rounded, dimensions define the edges, and the arcs are tangent.501628Where it is not clear that a hole goes through, the abbreviation THRU follows a dimension511830Where machining centers are to remain on the finished part, they are indicated by a Note or dimensioned on the drawing. See ANSI B94.11M.522032Where required to provide a press fit between parts, Knurling is specified by a note that includes the type of knurl required, its pitch, the toleranced diameter of the feature before knurling, and the minimum acceptable diameter after knurling.531224Where the desired area is shown on a direct view of the surface, the area is section lined within the Chainline boundary and appropriately dimensioned.