How to interpret this drawing.

[seiseilim]

Hi,

I' confuse with the drawing which i had attached. Please refer to the red arc in the drawing only as reference, the blueprint shown the red arc with 13.72R from the center. And there is a statement which mentioned 'ALL OUTSIDE FILLET RADII 2.54 - 3.55'.
Should it be in condition A or condition B?
Hope to get ad vices from you guys!!
Thanks!!

 

[ewh]

Will tangent to three circles result in R13.72?
Will condition B allow for R13.72?
The dimensioned view makes no mention of the larger circle.

"Know the rules well, so you can break them effectively."
-Dalai Lama XIV

 

[BraunP]

My guess would be condition A. If I was looking at the part, I would say that you would need a physical largest circle to make a fillet between the 3 circles. While with Condition A you have 2 arc that would have a radius between 2.54 and 3.55. That is just my thoughts. feel free to just plain ignore them if you feel its wrong =)

Another thing, is that looking at the part, I would assume there was a "sharp" corner that was changed into a fillet. so it would create condition A.

Hopefully I understood the question correctly and this was helpful

 

[seiseilim]

Hi ewh,
Will tangent to three circles result in R13.72?-the arc less than R13.72, but one point of it is drawn by R13.72. Would a drawing indicating the same as the dimensioned view just to get the tangent?
Will condition B allow for R13.72?-yes, there is a small arc between two fillets in R13.72.

 

[3DDave]

I don't see a third circle. I do see a radius dimension line that's been over-extended and is difficult to see a meaning for. At best the area is underdimensioned and not interpretable. Ask the source of the drawing to add the missing dimensions and add some tolerances.

 

[Gilmiril]

I don't think that tangent to three circles/arcs would work here because I also only see two. It seems like too much information has been removed to allow us to properly visualize the geometry, and without that, how can we interpret what is meant?