Finish symbol on drawing
Finish symbol on drawing
(OP)
I have a finish symbol on a cylinder, and a finish symbol (of the same roughness) on the flange face that is perpendicular to the cylinder. There is a fillet that joins the two surfaces.
Can it be implied that the fillet will be the same surface finish of the two other machined surfaces, or do I need to add a finish symbol to it also?
This is for a machined casting.
Can it be implied that the fillet will be the same surface finish of the two other machined surfaces, or do I need to add a finish symbol to it also?
This is for a machined casting.





RE: Finish symbol on drawing
RE: Finish symbol on drawing
RE: Finish symbol on drawing
Otherwise TVP & Nom are about right, if you don't explicitly spec it you aren't speccing it.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Finish symbol on drawing
RE: Finish symbol on drawing
According to the Machinery's Handbook Twenty-First edition(which references ANSI Y14.36-1978), "Areas of transition, such as chamfers and fillets, shall conform with the roughest adjacent finished area unless otherwise indicated."
Therefore, if the surrounding surfaces have the same finish requirement, then the transition surface will also have that finish requirement.
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: Finish symbol on drawing
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Finish symbol on drawing
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: Finish symbol on drawing
Peter Stockhausen
Senior Design Analyst (Checker)
Infotech Aerospace Services
www.infotechpr.net
RE: Finish symbol on drawing
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: Finish symbol on drawing
I also have the genium & global manuals but they are too thick to look through for other peoples problems
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Finish symbol on drawing
RE: Finish symbol on drawing
RE: Finish symbol on drawing
While I agree that adding the extra symbols will eliminate any confusion, I would rather eliminate that confusion through education. Yes, you may get non-conforming parts, but you will also get better educated workers. Of course, in todays economic climate, getting parts out the door is far more important than investing in your workforce.
All it would take is a couple of whacks on the head, and they won't make that mistake again!
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: Finish symbol on drawing
RE: Finish symbol on drawing
My response was aimed more at work done in-house. Other people's employees are their problem, and all you can really do is as you suggest, or start rejecting parts if you have the luxury of time.
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: Finish symbol on drawing
Yes, if you have the luxary of time (and money) you can reject the parts until the supplier delivers what you have spec'ed on the drawing.
"Wildfires are dangerous, hard to control, and economically catastrophic."
Ben Loosli
RE: Finish symbol on drawing
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: Finish symbol on drawing
Peter Stockhausen
Senior Design Analyst (Checker)
Infotech Aerospace Services
www.infotechpr.net