| Tubing wall thickness tolerances (concentricity) |
| Wall Thickness Range |
Grades |
XX, XXX
Paper Phenolic |
LE, Linen Phenolic
to .500" ID |
LE, Linen Phenolic
>500" ID |
C, Canvas Phenolic |
All Glass Grades
G10/FR4,
G11/FR5,
G5/G9, G7 |
.010" to .016"
.017" to .031"
.032" to .062"
.063" to .125"
.126" to .250"
.251" to .500" |
± .003"
± .005"
± .006"
± .007"
± .009"
± .011" |
-
-
± .010"
± .011"
± .013"
± .015" |
-
-
± .008"
± .009"
± .011"
± .013" |
-
-
-
± .015"
± .020"
± .020" |
-
± .006"
± .008"
± .009"
± .011"
± .013" |
|
The tolerances listed are per NEMA Standards and are based on the ± deviation of the actual nominal wall thickness.
TIR- Total Indicator Runout is the difference between the lowest wall thickness reading and the highest wall thickness reading of a given tube section. It is the total of the ± tolerances listed in the concentricity table above.
Example- a XX tube 1.000" ID by 1.250" OD has a concentricity of ± .007". Thus, the TIR is .014". |
