Surface Finish marks
Surface Finish marks
(OP)
I have a question with regards to surface finish callouts.
If you had a 24"x24" A36 burnout plate with 2 keyways anywhere on the finished side of the burnout, and the keys are parallel, held to +/-0.001 to eachother with a 0.500 +0.001 -0.000 key width x 0.25 deep. Do you need to add a surface finish mark? I personally don't see the point to it, but my new manager does. Any information to a link with standards would help.
Thanks alot,
metL4mr
If you had a 24"x24" A36 burnout plate with 2 keyways anywhere on the finished side of the burnout, and the keys are parallel, held to +/-0.001 to eachother with a 0.500 +0.001 -0.000 key width x 0.25 deep. Do you need to add a surface finish mark? I personally don't see the point to it, but my new manager does. Any information to a link with standards would help.
Thanks alot,
metL4mr





RE: Surface Finish marks
Chris
Systems Analyst, I.S.
SolidWorks 06 4.1/PDMWorks 06
AutoCAD 06
ctopher's home (updated 06-21-06)
RE: Surface Finish marks
Regards,
Powerhound
RE: Surface Finish marks
RE: Surface Finish marks
If your key width is .500+.001/0, then a finish in excess of 1000_microinches uses up your fabricator's error budget.
My very rough guess is that your fabricator needs to achieve 125_microinches simply to meet your linear tolerance. I would not specify a finish unless you want something better than that.
JHG
RE: Surface Finish marks
FAQ559-1100
Chris
Systems Analyst, I.S.
SolidWorks 06 4.1/PDMWorks 06
AutoCAD 06
ctopher's home (updated 06-21-06)
RE: Surface Finish marks
RE: Surface Finish marks
Chris
Systems Analyst, I.S.
SolidWorks 06 4.1/PDMWorks 06
AutoCAD 06
ctopher's home (updated 06-21-06)
RE: Surface Finish marks
RE: Surface Finish marks
Chris
Systems Analyst, I.S.
SolidWorks 06 4.1/PDMWorks 06
AutoCAD 06
ctopher's home (updated 06-21-06)
RE: Surface Finish marks
SURFACE ROUGHNESS TO BE ____ RMS PER ASME B46.1.
I think Ctopher may have been correct....