I hope you don't mean a bent shaft as in it was machined incorrectly. Perhaps you mean angled shaft? Or perhaps misassembled or damaged by improper use?
if the dial gauge scale fixed at certain point throughout the length of the horizontal object with respect to vertical object means it perpendicular.yes or no?
2:47 If you checking the runout for this shaft then which part/surface you consider as your datum ..because to check runout we need to refer one datum ... If datum is not there then it is circularity...so what are you checking exactly...circularity or runout....big confusion..I am also surprised no one has noticed this....all are like good video,nice animation and all....grow up all.
GD&T is all about making callouts that are practical for saving money and improving part rejection through communicating clear design intent. Runout has everything to do with the rotating shaft's operating properties rather than its geometric ones. Runout is a measure of wobble under rotation and its datums come entirely from the rotating axis of the fixturing holding the shaft, in this case in the video, these are the motor bearings. Circularity requires measuring all around the part to find the theoretical center of the cross-section and then figuring out the deviation from a theoretical circle about the theoretical center. These extra steps are needed because the swing of the bent shaft (and indeed the physical distance of the center of the cross-section from the rotational axis) contribute to the indicator runout measurement, but are not part of the circularity measurement. A lot of gd&t courses make runout sound complicated by talking about how it's the measure of a great many factors, but in reality, it is one of the simplest measurements you can make because you just stick an indicator on there and see if it wobbles.
There are a lot of latest softwares sir ; Blender;Fusion 360;solidworks also have animation pane inbuilt they can perform cad as well as animated videos could be created with them seamlessly
Frank i use a angle block and the height gage, clamp the part to the angle block using the little block he has to set it up in 1 side then just clamp and block.
I do not understand. Is this straightness tolerance for nominal designs? You casually mention that your cylinder could have a taper on it but it will still pass tolerance if the tapered line fits within the tolerance "band". Is it INTENDED to have a taper in it? Or is that a result of some clown messing up on a mill?
I'm pretty sure that you cannot runout a feature to itself. How would you hold the part on datum features -A- and -B- and put a runout gage on those surfaces at the same time? Instead, I would have specified a runout on datum feature -B- relative to datum -A-, and then specified that the other diameters meet a runout relative to A-B.
But you aren't referencing it to itself as if it was "relative to A" and also defining "A", you are referencing the composite of both that axis and the other, which is completely measurable.
To measure straightness of a flat plate, if i keep the plate on a surface table and measure Straightness, would that be a correct method. Because, if we keep a flat plate on surface table, Bottom surface will act as a datum and what i will get is the Parallelism and not Straightness. Kindly help me.
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