[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-573284-105":3,"detail-sidebar-cat-1-en-105":74,"doc-detail-573284-en":120},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":67,"head_meta":69,"extra_data":71,"updated_unix":73},105,"en","geometric-dimensioning-symbols-rules-and-guidelines","Geometric Dimensioning - Symbols, Rules, and Guidelines","","Geometric Dimensioning describes core concepts used to specify part tolerances, emphasizing Maximum Material Condition (MMC), Least Material Condition (LMC), and the default Regardless of Feature Size (RFS) behavior. It explains projected tolerance zones, statistical tolerances, and free-state inspection requirements. The guide clarifies how datum targets and a three-plane datum reference frame control degrees of freedom, and summarizes key limits-of-size versus geometric-tolerance rules for typical feature control applications.",{"@graph":14,"@context":66},[15,34,49],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/template/","Template",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/template/paper-templates/","Paper Templates",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/template/geometric-dimensioning-symbols-rules-and-guidelines/573284/",4,{"url":32,"name":10,"@type":35,"author":36,"headline":10,"publisher":39,"fileFormat":42,"inLanguage":8,"description":12,"dateModified":43,"datePublished":43,"encodingFormat":42,"isAccessibleForFree":44,"interactionStatistic":45},"DigitalDocument",{"name":37,"@type":38},"Fans","Person",{"url":19,"name":40,"@type":41},"DocShare","Organization","application/pdf","2026-10-14",true,{"@type":46,"interactionType":47,"userInteractionCount":4},"InteractionCounter",{"@type":48},"ViewAction",{"@type":50,"mainEntity":51},"FAQPage",[52,58,62],{"name":53,"@type":54,"acceptedAnswer":55},"What do MMC and LMC mean in geometric dimensioning?","Question",{"text":56,"@type":57},"MMC is the condition where a size feature contains the maximum material within the size limits, while LMC is the condition where it contains the least material within the size limits.","Answer",{"name":59,"@type":54,"acceptedAnswer":60},"What does RFS mean for geometric tolerances?",{"text":61,"@type":57},"RFS (regardless of feature size) is the default geometric tolerance condition and allows no bonus tolerances; functional gages are not used.",{"name":63,"@type":54,"acceptedAnswer":64},"How do datum targets and the three-plane datum reference frame work?",{"text":65,"@type":57},"Datum targets define specific points, lines, or areas used for support machining and inspection, and the three-plane concept uses mutually perpendicular features to control a part’s free movement in space.","https://schema.org",{"og:url":32,"og:type":68,"og:title":10,"og:site_name":40,"og:description":12},"article",{"robots":70,"canonical":32},"index,follow",{"doc_id":72,"site_id":7},573284,1791936595,{"code":4,"msg":75,"data":76},"success",[77,82,87,92,97,102,107,112,116],{"id":78,"doc_module":22,"doc_module_name":25,"category_name":79,"show_sort_weight":80,"slug":81},11,"Presentations",90,"presentations",{"id":83,"doc_module":22,"doc_module_name":25,"category_name":84,"show_sort_weight":85,"slug":86},12,"Resumes",80,"resumes",{"id":88,"doc_module":22,"doc_module_name":25,"category_name":89,"show_sort_weight":90,"slug":91},14,"Invoices",70,"invoices",{"id":93,"doc_module":22,"doc_module_name":25,"category_name":94,"show_sort_weight":95,"slug":96},15,"Posters",60,"posters",{"id":98,"doc_module":22,"doc_module_name":25,"category_name":99,"show_sort_weight":100,"slug":101},16,"Social Media",50,"social-media",{"id":103,"doc_module":22,"doc_module_name":25,"category_name":104,"show_sort_weight":105,"slug":106},17,"Forms",40,"forms",{"id":108,"doc_module":22,"doc_module_name":25,"category_name":109,"show_sort_weight":110,"slug":111},18,"Letters",30,"letters",{"id":113,"doc_module":22,"doc_module_name":25,"category_name":29,"show_sort_weight":114,"slug":115},21,5,"papers-templates",{"id":117,"doc_module":22,"doc_module_name":25,"category_name":118,"show_sort_weight":4,"slug":119},158,"General","general-158",{"code":4,"msg":75,"data":121},{"doc_id":72,"user_id":122,"nickname":37,"user_avatar":123,"doc_module":22,"category_id":113,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":124,"file_id":125,"file_url":126,"file_type":127,"file_size":128,"view_count":4,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":22,"language":129,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":130,"faqs":131,"seo_title":132,"seo_description":12,"update_tm":73,"read_time":4},5909892330395,"https://ap-avatar.wpscdn.com/davatar_6f874abed73319feea01a86fa6f0fab8","| GEOMETRIC DIMENSIONING |  |  |  |  |  |  |  |  |  |\n| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |\n| FACTS TO REMEMBER | SYMBOLS, RULES, AND GUIDELINES |  |  |  |  |  |  |  | FACTS TO REMEMBER |\n| \u003Cbr>M – MMC – MAXIMUM MATERIAL CONDITION:\u003Cbr>THAT CONDITION WHERE A FEATURE OF SIZE CONTAINS THE MAXIMUM AMOUNT OF\u003Cbr>MATERIAL WITHIN THE STATED LIMITS OF SIZE. EXAMPLE: MINIMUM HOLE SIZE AND MAXIMUM SHAFT SIZE.\u003Cbr>L – LMC – LEAST MATERIAL CONDITION: THAT CONDITION WHERE A FEATURE OF\u003Cbr>SIZE CONTAINS THE LEAST AMOUNT OF MATERIAL WITHIN THE STATED LIMITS OF SIZE. EXAMPLE: MAXIMUM HOLE SIZE AND MINIMUM SHAFT SIZE.\u003Cbr>RFS – REGARDLESS OF FEATURE SIZE:\u003Cbr>THIS IS THE DEFAULT CONDITION FOR ALL GEOMETRIC TOLERANCES. NO BONUS TOLERANCES ARE ALLOWED. FUNCTIONAL GAGES MAY NOT BE USED.\u003Cbr>P – PROJECTED TOLERANCE ZONE: WHEN THE SYMBOL IS SHOWN, IT MEANS THE\u003Cbr>STATED TOLERANCE ZONE IS EXTENDED BEYOND THE SURFACE OF THE PART, NOT WITHIN THE PART.\u003Cbr> ST  – STATISTICAL TOLERANCE: A\u003Cbr>TOLERANCE FOR A PART OF AN ASSEMBLY BASED ON THE RESULTS FROM A STATISTICAL CALCULATION. THE DESIRED RESULT IS LARGER TOLERANCES.\u003Cbr>F – FREE STATE: THIS SYMBOL INDICATES\u003Cbr>THE PARTS MUST NOT BE RESTRICTED DURING INSPECTION.\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>TOLERANCE ZONES: ALL TOLERANCE ZONES SHOWN IN THE FEATURE CONTROL FRAME ARE TOTAL. EXAMPLE: FLATNESS WITHIN .004 MEANS THAT TWO PARALLEL PLANES NO MORE THAN .004 APART DEFINE THE TOLERANCE ZONE.\u003Cbr>– DATUM TARGETS: USED TOA1 SPECIFIC POINTS, LINES, OR AREAS\u003Cbr>ON PARTS USED FOR SUPPORT MACHINING AND INSPECTION COMMONLY USED ON RIGID PARTS LIKE CASTINGS AND FORGINGS AND NON-RIGID PARTS MADE FROM PLASTIC, RUBBER, OR SHEET METAL.\u003Cbr>DATUM REFERENCE FRAME: (THREE PLANE CONCEPT) . THE CONCEPT OF USING MUTUALLY PERPENDICULAR FEATURES OF APART TO CONTROL ITS FREE MOVEMENT IN SPACE (DEGREES OF FREEDOM) . SEE DATUM SYMBOL AND DATUM TARGETS.\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>FREE MOVEMENT\u003Cbr>RESTRICTED MOVEMENT\u003Cbr>LIMITS OF SIZE RULE: WHERE ONLY A SIZE DIMENSION IS GIVEN. a) THE SIZE DIMENSIONS AT ANY CROSS SECTION MUST BE WITHIN THE SIZE TOLERANCE. b) THE SURFACE(S) SHALL NOT EXTEND BEYOND THE PERFECT FORM DEFINED BY THE MMC SIZE. c) THE FORM MAY VARY WITHIN AN ENVELOPE BETWEEN THE MMC AND LMC.\u003Cbr>GEOMETRIC TOLERANCE RULE: GEOMETRIC\u003Cbr>TOLERANCES ARE UNDERSTOOD TO BE APPLIED RFS. IF MMC OR LMC IS REQUIRED, IT MUST BE PLACED IN THE FEATURE CONTROL FRAME. SEE MMC, LMC, OR RFS COLUMN.\u003Cbr>PITCH DIAMETER RULE: TOLERANCES THAT APPLY TO SCREW THREADS APPLY TO THE AXIS OF THE THREAD DERIVED FROM THE PITCH CYLINDER. IF ANOTHER PART OF THREAD IS TO BE USED TO DERIVE THE AXIS, IT MUST BE STATED BENEATH THE FEATURE CONTROL FRAME. ANY OTHER FEATURE THAT HAS A PITCH DIAMETER MUST HAVE THE DATUM FEATURE STATED. | TYPE | SYMBOL | AS SHOWN\u003Cbr>ON DRAWING | TOLERANCE\u003Cbr>ZONE | MMC LMC\u003Cbr>OR RFS | DATUM\u003Cbr>USED | FUNC\u003Cbr>GAGE\u003Cbr>USED | TOLER\u003Cbr>ZONE\u003Cbr>TYPE  | |\n|  | PROFILE ORIENTATION FORM | STRAIGHTNESS | .500 .005\u003Cbr>.004 | TWO PARALLEL LINES .004 APART | M OR L\u003Cbr>CAN\u003Cbr>APPLY TO A FEATURE\u003Cbr>OF SIZE.\u003Cbr>| NO | YES\u003Cbr>IF\u003Cbr>M\u003Cbr>IS\u003Cbr>STATED | A\u003Cbr>H\u003Cbr>J\u003Cbr>\u003Cbr>\u003Cbr>|  |\n|  |  | FLATNESS | .500 .005\u003Cbr>.004 | TWO PARALLEL PLANES, .004 APART\u003Cbr>| DOES\u003Cbr>NOT\u003Cbr>APPLY | NO | NO | D\u003Cbr>|  |\n|  |  | CIRCULARITY | \u003Cbr>.500 .005\u003Cbr>.004\u003Cbr>| TWO CONCEN– TRIC CIRCLES\u003Cbr>.004 APART\u003Cbr>\u003Cbr>| DOES\u003Cbr>NOT\u003Cbr>APPLY | NO | NO | B\u003Cbr>|  |\n|  |  | CYLINDRICITY\u003Cbr>PARALLELISM | .500 .005\u003Cbr> .004\u003Cbr>\u003Cbr> .004 A\u003Cbr>\u003Cbr>A\u003Cbr>\u003Cbr>\u003Cbr>| TWO CONCEN– TRIC CYLINDERS.004 APART\u003Cbr>TWO PARALLEL PLANES.004 APART\u003Cbr>A\u003Cbr>\u003Cbr>| DOES\u003Cbr>NOT\u003Cbr>APPLY\u003Cbr>M OR L\u003Cbr>CAN\u003Cbr>APPLY TO A FEATURE\u003Cbr>OF SIZE.\u003Cbr>| NO\u003Cbr>YES | NO\u003Cbr>YES\u003Cbr>IF\u003Cbr>M\u003Cbr>IS\u003Cbr>STATED\u003Cbr>| E\u003Cbr>A\u003Cbr>D\u003Cbr>G\u003Cbr>H\u003Cbr>J\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>|  |\n|  |  | PERPEN– DICULARITY |   .004 A A\u003Cbr>\u003Cbr>| \u003Cbr>\u003Cbr>90˚\u003Cbr>| M OR L\u003Cbr>CAN\u003Cbr>APPLY TO A FEATURE\u003Cbr>OF SIZE.\u003Cbr>| YES | YES\u003Cbr>IF\u003Cbr>M\u003Cbr>IS\u003Cbr>STATED\u003Cbr>| A\u003Cbr>D\u003Cbr>G\u003Cbr>H\u003Cbr>J\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>|  |\n|  |  | ANGULARITY\u003Cbr>PROFILE OF A LINE | .004 A\u003Cbr>| TWO PARAL","cbCaiqftkbR6J84A","https://ap.wps.com/l/cbCaiqftkbR6J84A","pdf",57784,"English","# Facts to Remember\n## Symbols, Rules, and Guidelines\n## Tolerance Zones and Datum Concepts\n## Limits of Size and Geometric Tolerance Rules","[{\"question\":\"What do MMC and LMC mean in geometric dimensioning?\",\"answer\":\"MMC is the condition where a size feature contains the maximum material within the size limits, while LMC is the condition where it contains the least material within the size limits.\"},{\"question\":\"What does RFS mean for geometric tolerances?\",\"answer\":\"RFS (regardless of feature size) is the default geometric tolerance condition and allows no bonus tolerances; functional gages are not used.\"},{\"question\":\"How do datum targets and the three-plane datum reference frame work?\",\"answer\":\"Datum targets define specific points, lines, or areas used for support machining and inspection, and the three-plane concept uses mutually perpendicular features to control a part’s free movement in space.\"}]","Geometric Dimensioning - Symbols, Rules, and Guidelines | PDF"]