Diameter
|
Gage
|
Thickness
|
Body Width
|
2-12"
|
0.25"
|
0.01"
|
0.5"
|
2-24"
|
0.25"
|
0.01"
|
0.5"
|
12-24"
|
0.25"
|
0.01"
|
0.5"
|
12-36"
|
0.25"
|
0.01"
|
0.5"
|
24-36"
|
0.25"
|
0.01"
|
0.5"
|
24-48"
|
0.25"
|
0.01"
|
0.5"
|
36-48"
|
0.25"
|
0.01"
|
0.5"
|
48-60"
|
0.25"
|
0.01"
|
0.5"
|
60-72"
|
0.25"
|
0.01"
|
0.5"
|
| METRIC |
50-300mm
|
6.35mm
|
0.25mm
|
12.7mm
|
100-300mm
|
6.35mm
|
0.25mm
|
12.7mm
|
50-600mm
|
6.35mm
|
0.25mm
|
12.7mm
|
300-600mm
|
6.35mm
|
0.25mm
|
12.7mm
|
300-900mm
|
6.35mm
|
0.25mm
|
12.7mm
|
600-900mm
|
6.35mm
|
0.25mm
|
12.7mm
|
600-1200mm
|
6.35mm
|
0.25mm
|
12.7mm
|
900-1200mm
|
6.35mm
|
0.25mm
|
12.7mm
|
1200-1500mm
|
6.35mm
|
0.25mm
|
12.7mm
|
1500-1800mm
|
6.35mm
|
0.25mm
|
12.7mm
|
Our precision diameter tapes are manufactured to exacting standards in
temperature controlled facilities at 68°F (20°C). The lines and numerals on our
standard tapes are engraved and acid etched on a ground surface. The tapes have
fixed readings that do not require periodic adjustments.
Our standard Imperial tapes (inches) read to 0.001” diameter with an accuracy
of ±0.001” up to 144 inches.
Our standard metric tapes (millimeters) read to 0.01mm diameter with an
accuracy of ±0.03mm up to 3,600 millimeters.
Each Pi Tape brand precision measuring tape is delivered with a Calibration
Report traceable to the National Institute of Standards and Technology and all
calibrations are performed in accordance with ANSI/NCSL Z540-1-1994, ISO/IEC
17025, ISO 10012-1, MIL-STD 45662A and 10CFR, part 21.
Inch Instructions for Use
Metric Instructions for Use
Physical Properties of Steel - Pi Tape
Corporation
| |
1095 Spring Steel |
716 Stainless Steel |
| Coefficient of Expansion per inch per degree F. |
.0000065 |
.0000062 |
| Elongation % in inches |
7-10% |
7-12% |
| Hardness |
51 RC |
49-53 RC |
| Tensile Strength PSI |
259,600 |
248,000-277,000 |
| Yield Strength PSI |
235,690 |
210,000 |
| |
|
|
THE RELEVANT CRITERIA REGARDING THERMAL QUALITIES OF
STEEL
Comparing coefficient of thermal expansion
|
Our spring steel:
|
Other materials on the market:
|
|
|
.0000065”
|
.0000092”
|
Difference
|
|
24” with 5ºf temp variable
|
.0007”
|
.0011”
|
.0004”
|
|
24” with 20ºf temp variable
|
.0030”
|
.0044”
|
.0014”
|
|
48” with 5ºf temp variable
|
.0015”
|
.0022”
|
.0007”
|
|
48” with 20ºf temp variable
|
.0060”
|
.0088”
|
.0028”
|
|
|
|
|
As profiled, the smaller coefficient of thermal expansion
available with our materials makes a significant difference when working in
variable temp environments.
Pi Tape chooses to acid etch the majority of our products. Our
.010” thick material is acid etched with markings that are .001” to .002” deep.
This etch is more durable and does not rub off under easily under heavy
usage.
