Im confused by the 10 deg and 20 deg dimensions are basic along with a few others. I do t see any GD&T that contols their angularity so why can they be basic dimensions? Wouldnt that mean that those angles are not toleranced?
in case i use datum targets A1-A5 (cylindrical 30mm), is it possible to add a tighter tolerance between these targets only? For the rest of the surface to leave it, for ex. 1mm.
Remember when using datum Targets the size in the upper portion of the target symbol is the basic size of the datum target area. Datum targets are used to indicate exactly where on a surface the datum simulators are to simulate the corresponding datum. If you apply a qualifying flatness to this datum feature in the designated areas, that flatness only applies to the areas on the datum feature that are specified.
If Datum A was the outermost surface of the part, would the tolerance zone of .005 be centered on that plane and extend either side, or would it extend into the part itself as a result of the datum placement? Thanks
Flatness and parallelism? What about a part with say lathe dovetail? You specify flatness for surfaces buta also need to ensure they run parallel measning the part will not bind when i moves. So can parallel symbol be used for same angle and direction but not parallel (againt each other surfaces)?
depends on the machinist/machine, am i right ?? all jokes aside, the designers responsibility is to apply the largest tolerance that the design will allow, not the smallest tolerance that can be achieved.
This video is extremely helpful. Thank you for your very clear explanation.
ruclips.net/video/XQIbn27dOjE/видео.html 💐💐👍👍
Yes, we can. Short answer. Good explanation, thank you for it.
Im confused by the 10 deg and 20 deg dimensions are basic along with a few others. I do t see any GD&T that contols their angularity so why can they be basic dimensions? Wouldnt that mean that those angles are not toleranced?
The 10 and 20 degree dimensions are defining a True Profile. This is the ideal shape of a feature being controlled by a profile tolerance.
So can we use perpendicularity & position to the hole?& when to use the only position to the hole?
in case i use datum targets A1-A5 (cylindrical 30mm), is it possible to add a tighter tolerance between these targets only? For the rest of the surface to leave it, for ex. 1mm.
Remember when using datum Targets the size in the upper portion of the target symbol is the basic size of the datum target area. Datum targets are used to indicate exactly where on a surface the datum simulators are to simulate the corresponding datum. If you apply a qualifying flatness to this datum feature in the designated areas, that flatness only applies to the areas on the datum feature that are specified.
If Datum A was the outermost surface of the part, would the tolerance zone of .005 be centered on that plane and extend either side, or would it extend into the part itself as a result of the datum placement? Thanks
ruclips.net/video/XQIbn27dOjE/видео.html 💐💐👍👍
Flatness and parallelism? What about a part with say lathe dovetail? You specify flatness for surfaces buta also need to ensure they run parallel measning the part will not bind when i moves. So can parallel symbol be used for same angle and direction but not parallel (againt each other surfaces)?
ruclips.net/video/XQIbn27dOjE/видео.html 💐💐👍👍
@@beoptimistic5853 Can you be more specific?
Any flatness of .005 is rubbish for a machined finish- .0005 is easily achieved over 4 x 4 inch .
depends on the machinist/machine, am i right ?? all jokes aside, the designers responsibility is to apply the largest tolerance that the design will allow, not the smallest tolerance that can be achieved.