DATUM: Datum System “: Degree (of angle) DIA: Diameter. The issuance of a drawing from the engineering/design activity to the production activity. CM: Centimeters. See also, A note telling the manufacturer that all surfaces of the part are to be machined (as opposed to leaving any surfaces as-cast or as-forged). underside of duct u.o.p. CHAM: Chamfered. Please note that the same abbreviation may have different meanings in different categories. CSK HD: Countersink Head. ASSY: Assembly. CR is for critical features whose performance truly requires near-perfect geometry. Not an obsolete usage, but not seen as commonly as it was decades ago; not least because parts that once would have been spot-faced castings are now likelier to be contoured from billet with, The rectangular box (with several cells) that conveys geometric tolerances in, The [main] field of the drawing, as opposed to other areas of it, such as the parts list (. 2. Because there is no large space on a drawing to contain all the text to illustrate the image, abbreviations, and symbols are often used in engineering drawings to communicate the characteristics of the product to be manufactured. MBP: measurement between pins: threads, splines, gears (internal, female) (synonymous with MBW) (see also MOP, MOW) MBW: measurement between wires: threads, splines, gears (internal, female) (see also MBP, MOP, MOW) MF or M/F: make from For example, ASME Y14.5 and Y14.100 are commonly used standards that define all of the symbols and drafting conventions used. See also herein, Rough-turned means turned on a lathe but not finished to a final machined dimension and. For example, certification of metallurgical content and processes. Mechanical found in Drawing abbreviations. And the many standards that it issues, for example, ASME Y14.5. MEP. The metric system in its current form (latest standards). When one part number is made from another, it means to take part A and machine some additional features into it, creating part B. The AISI acronym is commonly seen as a prefix to. Fine: BSF: Pitch Circle: PC: British Standard. Helps to analyze system weaknesses (such as worn-out equipment, operators in need of more training, or, In the sense of "not elsewhere classified", the abbreviation is well-known within certain fields, but not others; to avoid confusion, spell out. production fields of machining. A system in place to ensure that quality of manufacture is produced and maintained; a system to prevent defective parts from being made, or, even if made, from getting into finished inventories. You can find the list of common engineering drawing abbreviations. Mechanical: MIN: Minimum: MU: Make-Up Water: MUA: Make-Up Air: NC: Noise Criteria or Normally Closed: NO: Normally Open: NOM: Nominal: OA: Outside Air: OAI: Outside Air Intake: OC: On Center: OD: Outside Diameter: ODP: Open Drip Proof: OV: Outlet Velocity: PCF: Pounds per Cubic Foot: PD: Pressure Drop: PH: Phase: PRV: Pressure Reducing Valve: PSI: Pounds per Square Inch: PSIA: Pounds per … Flats and reversals (falling within the dimensional tolerance zone) are tolerated unless "CR" (controlled radius) is explicitly specified. Drilled holes commonly have a required minimum edge distance, if the inspection finds that the edge distance is below minimum, then commonly reported as having an IED condition. Approximate: APPROX: Not to Scale: NTS: Assembly: ASSY: Outside Diameter: OD: British Standard. Copyright ©Junying Metal Manufacturing Co., Limited, Engineering Drawing Abbreviations and Symbols – Technical & Mechanical Design Symbols | CNCLATHING. See also. Drawings may be printed (plotted) from the model for reference use, but the model remains the governing legal instrument. A nominal dimension for the stock material, such as. MJ. For example, a chamfer may be called out as 12 X 45°, When a dimension is used in multiple places either of these prefixes can be added to the dimension to define how many times this dimension is used. Mechanical Joint. CSK: Countersink. Standards established by the U.S. military and widely used in the, The [U.S.] National Coarse series of pre-1949 corresponds today to the Unified National Coarse (UNC) of the, This abbreviation is used in a machine shop when recording nonconformances (out of tolerance, etc.). DIM: Dimension. Abbreviations: Term: Abbreviations: Symbols: Across Corner: A/C: Material: MATL: Across Flat: A/F: Mechanical: MECH: Approved: APPD: Number: No. An FoS is a feature that can have size associated with it, usually involving the opposition of two surfaces (e.g., the two diametrically opposite sides of a hole wall; the two opposite walls of a slot or flange). The intelligence behind defining AQLs is in figuring out how much error is tolerable given the costs that would be incurred by any efforts to further reduce its incidence. (The latter practice is not uncommon but is. referring to an assembly of parts rather than just one (sub)part ("piece part", "detail part"). A committee that reviews some nonconforming materials which are submitted as potentially still usable/saleable (if the nonconformance does not hinder fit or function). With regard to surface roughness, it means that the heights of the individual microscopic peaks and valleys shall be averaged together via RMS to yield a measurement of roughness. Translates as Key or Wrench Width. Both the material and the abbreviation are obsolete, or nearly so. DRG: Drawing Center line, the central axis of a feature. C’BORE or CBORE: Counterbore. Technical standards are made to define and provide glossaries of abbreviations, acronyms, and symbols that may be found on engineering drawings. In a feature control frame (, Diameter of a circle. See also, A cap screw with a socket head (usually implying a hex socket, driven with a. You can find the list of common engineering drawing abbreviations. (Note on. The complete package of information that defines a part, of which the drawing itself is often only a subset. ARCH ARCHITECTURAL. And the many standards that it issues, for example, the SAE AMS and SAE AS standards series. CL: Center line. This is usually implied by default, so "S/C" often need not be explicitly added. The parts list or L/M, in the "material" field, will say "M/F PN 12345". A note that is called out in specific spots in the field of the drawing. A part which is outsourced from an external supplier, or "bought out". 1. ACC AIR COOLED CONDENSER. Width across flats, often found on drawings of german origin. Jump to: 0-9 • A • B • C • D • E • F • G • H • I • J • K • L • M • N • O • P • Q • R • S • T • U • V • W • X • Y • Z • see also, United States Military Standard > Origins and evolution, International Organization for Standardization, List of geometric dimensioning and tolerancing symbols, "Engineering Materials Abbreviations and Acronyms", https://en.wikipedia.org/w/index.php?title=Engineering_drawing_abbreviations_and_symbols&oldid=991011422, Creative Commons Attribution-ShareAlike License.
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