Symbols in 2d layers (draped on a surface): Regardless of feature size (rfs) regardless of feature size (rfs): In this case, the rfs symbol would be the symbol from the 1982 version of y14.5, please ref to the attached examples of rule #2 and rule #2a ( from alex krulikowski gd&t workbook ).
PPT Datums and Datum Feature References PowerPoint
This is the default spec and any tolerance is assumed to be regardless of feature size even if the symbol is not used.
The symbol appears the same size regardless.
Datum target symbol with area size target number 2 h target point target area target line mmc, maximum material condition or mmb, maximum material boundary rfs, regardless of feature size (no symbol, rfs is assumed unless otherwise specified) lmc, least material condition or lmb, least material boundary 90° 1.5 h 0.8 h gd&t symbol creation geometric characteristic. So if there is no modifier symbol shown in feature control frame, it means rfs is the default modifier. Regardless of feature size simply means that whatever gd&t callout you make, is controlled independently of the size dimension of the part. By gd&t basics on december 11, 2014.
We are proud to list acronym of rfs in the largest database of abbreviations and acronyms.
It was used in the 1982 standard. Your gd&t is out of date. Rfs does not need any symbol representation on the drawing gd&t. Regardless of feature size eliminates any potential bonus tolerance, allowing the gd&t tolerances to be more tightly controlled.
There was a 2009 revision and the latest version is 2018.
The symbol appears larger at closer distances. If there is no call out to mmc or lmc, the part is measured regardless of feature size (rfs). Regardless of feature size simply means that whatever gd&t callout you make, is controlled independently of the size dimension of the part. Rfs is used when the size feature does not affect the specified tolerance.
September 2019 in product feedback.
Regardless of feature size (no symbol) • the reciprocity requirement is applicable only for features with defined tolerance values. The rfs means regardless of feature size. The following image shows one of the definitions of rfs in english: Regardless of feature size simply means that whatever gd&t callout you make, is controlled independently of the size dimension of the part.
• the reciprocity requirement is an additional requirement, which you can use together with the least or maximum material requirements in.
Least material condition is a feature of size symbol that describes a dimensional or size condition where the least amount of material (volume/size) exists within its dimensional tolerance. Rfs does not add up any bonus tolerance and the only tolerance available is the feature of size tolerance ( if any). So rfs is only used when the part is very precise and the application will be for critical components like in aircraft and medical devices. The symbol appears the same size regardless of distance.
The circle s symbol used to indicate that a datum feature reference applies at regardless of feature size (rfs) was discontinued in 1994.
Specific examples of features of size include: The symbol appears smaller at farther distances. The gd&t symbol for true position is a little crosshairs: Since regardless of feature size is the default condition it is used always and ignored only when.
Rfs is the default modifier.
Rfs is the default condition of all geometric tolerances by rule #2 of gd&t and requires no callout. The callout also overrides gd&t rule#2 or the. True positions are relative to datums, so you will want to spell out which datums in. Rfs = regardless of feature size looking for general definition of rfs?
Since 1994 datum feature references defaulted to rfs per rule #2.
For most geometric symbols besides those that allow maximum material condition, rfs can never be overridden. A hole diameter (a cylindrical surface) plate thickness (two opposed parallel surfaces) peg diameter (another cylindrical surface) a ball bearing diameter (a spherical surface) The symbol appears the same size regardless of distance. Rule #2a states that, for a tolerance of position, rfs may be specified in feature control frames if desired and applicable.
Regardless of feature size the tolerances do no change based on the size of the features.
Regardless of feature size is commonly termed as rfs. Rfs is the default condition of all geometric tolerances by.
