Standard Tolerance(in the title block) a comparsion from mm to in
Standard Tolerance(in the title block) a comparsion from mm to in
(OP)
I work in an environment where we use metric units and English dimensions on different drawings. We use the English dimensions on the tooling drawings (vises, cutters, etc). Then we use metric dimensions for the actual product we manufacture with the tooling. So to my question. Do the standard tolerances in the title block have to be the same, from metric units to English units? Here is what we have now
English
.xx +/- .03
.xxx +/- .010
.xxxx +/- .0020
Angle +/- 1
Metric
.x +/- .6
.xx +/- .20
.xxx +/- .030
Angle +/- 2
From my past understanding, these have to be the same value from one another, same decimal places, everything. What do you all think? Thank you
English
.xx +/- .03
.xxx +/- .010
.xxxx +/- .0020
Angle +/- 1
Metric
.x +/- .6
.xx +/- .20
.xxx +/- .030
Angle +/- 2
From my past understanding, these have to be the same value from one another, same decimal places, everything. What do you all think? Thank you





RE: Standard Tolerance(in the title block) a comparsion from mm to in
Wes C.
------------------------------
Light travels faster than sound. That's why some people appear bright until you hear them speak.
RE: Standard Tolerance(in the title block) a comparsion from mm to in
RE: Standard Tolerance(in the title block) a comparsion from mm to in
Metric
.x +/- .6
.xx +/- .2
.xxx +/- .03
Angle +/- 2
"Wildfires are dangerous, hard to control, and economically catastrophic."
Ben Loosli
Sr IS Technologist
L-3 Communications
RE: Standard Tolerance(in the title block) a comparsion from mm to in
As Ben described, remove the trailing zeros.
Chris
Systems Analyst, I.S.
SolidWorks 06 4.1/PDMWorks 06
AutoCAD 06
ctopher's home (updated 06-21-06)
RE: Standard Tolerance(in the title block) a comparsion from mm to in
RE: Standard Tolerance(in the title block) a comparsion from mm to in
I didn't look close enough.
Angle should be the same, unless you specify the difference.
Chris
Systems Analyst, I.S.
SolidWorks 06 4.1/PDMWorks 06
AutoCAD 06
ctopher's home (updated 06-21-06)
RE: Standard Tolerance(in the title block) a comparsion from mm to in
Again, I want to point out that the OP stated that the two different unit systems are for entirely different products (metric for product, us customary for tooling). Each product may have a different set of "standard" tolerances as defined by the manufaturing/engineering/inspection requrements.
I just don't see this as an issue whatsoever.
Wes C.
------------------------------
Light travels faster than sound. That's why some people appear bright until you hear them speak.
RE: Standard Tolerance(in the title block) a comparsion from mm to in
RE: Standard Tolerance(in the title block) a comparsion from mm to in
Wes C.
------------------------------
Light travels faster than sound. That's why some people appear bright until you hear them speak.
RE: Standard Tolerance(in the title block) a comparsion from mm to in
RE: Standard Tolerance(in the title block) a comparsion from mm to in
English tolrance should be based on decimal and metric on unit length or ISO 2768. Here's what I use for my metric drawings
UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN MILLIMETERS
IN ACCORDANCE TO ISO 2768-mKE
0.5 UO TO 3 +/- 0.1
OVER 3 UO TO 6 +/- 0.1
OVER 6 UP TO 30 +/- 0.2
OVER 30 UP TO 120 +/- 0.3
OVER 120 UP TO 400 +/- 0.5
OVER 400 UP TO 1000 +/- 0.8
MACHINE ANGLES +/- 0.5 DEGREES
MACHINE FINISH 3.2RMS
CORNER RADII 0.2MAX
CORNER EDGES 0.2 MAX
RE: Standard Tolerance(in the title block) a comparsion from mm to in
We used ISO 2768-mK, when we switched to ISO standards.
"Wildfires are dangerous, hard to control, and economically catastrophic."
Ben Loosli
Sr IS Technologist
L-3 Communications
RE: Standard Tolerance(in the title block) a comparsion from mm to in