The periphery tape. exemplified by Pi Tape® brand tape, provides a quick, accurate and easy method of reading true diameters of both round and out-of-round forms.
- Perfect for measurement of thin or soft walled parts - large
or small.
- Pi Tape gages consist of a narrow metal ribbon bearing special
graduations.
These graduations are designed to convert circumferential distance into diameter measurement so the observer can read the diameter directly from the scale.
- Tapes are checked over master gages at .001'"(.03mm)
accuracy for standard tapes up to 144" (3600mm).
Certificate of accuracy traceable to National Institute of Standards and Technology is furnished.
- Pi Tape gages are a precision tool made of 1095 clock spring
steel (on request 420 stainless steel - for use in a corrosive
atmosphere).
They require a minimum of maintenance, but we do recommend a quick wipe with an oil moistened cloth after use. A light gun oil works very well.
Make sure the tape has not been dented or kinked. This may
affect the accuracy of the tape.
Pi Tape gages are invaluable tools to the aero-space field as
well as the plastic pipe industry. The variety of uses are infinite.
In stock... tapes ranging from 3/4"-7" to 132"-144" diameter available for same day shipping.
Part No. | O.D,Outside Diameter Measuring Range |
Description Standard Outside Diameter, Material: 1095 Spring SteelClock Steel |
PI-000 | 1/2-2" | .500 to 2" Diameter Tape |
PI-01 | 3/4-7" | .75 to 7" Diameter Tape |
PI-1 | 2-12" | 2 to 12" Diameter Tape |
PI-1SP | 2-24" | 2 to 24" Diameter Tape |
PI-2 | 12-24" | 12 to 24" Diameter Tape |
PI-2SP | 12-36" | 12 to 36" Diameter Tape |
PI-3 | 24-36" | 24" to 36" Diameter Tape |
PI-3SP | 24-48" | 24 to 48" Diameter Tape |
PI-4 | 36-48" | 36 to 48" Diameter Tape |
PI-5 | 48-60" | 48 to 60" Diameter Tape |
PI-6 | 60-72" | 60 to 72"Diameter Tape |
PI-7 | 72-84" | 72 to 84" Diameter Tape |
PI-8 | 84-96" | 84 to 96" Diameter Tape |
PI-9 | 96-108" | 96 to 108" Diameter Tape |
PI-10 | 108-120" | 108 to 120" Diameter Tape |
PI-11 | 120-132" | 120 to 132"Diameter Tape |
PI-12 | 132-144" | 132 to 144" Diameter Tape |
In stock... tapes ranging from 38-200mm to 3300-3600mm diameter available for same day shipping.
Part No. | Description 1095 Spring Steel |
PI-M-0 | 28-200mm Diameter Tape |
PI-M-1 | 100-300mm Diameter Tape |
PI-M-1SP | 50-600mm Diameter Tape |
PI-M-2 | 300-600mm Diameter Tape |
PI-M-2SP | 300-900mm Diameter Tape |
PI-M-3 | 600-900mm Diameter Tape |
PI-M-3SP | 600-1200mm Diameter Tape |
PI-M-4 | 900-1200mm Diameter Tape |
PI-M-5 | 1200-1500mm Diameter Tape |
PI-M-6 | 1500-1800mm Diameter Tape |
PI-M-7 | 1800-2100mm Diameter Tape |
PI-M-8 | 2100-2400mm Diameter Tape |
PI-M-9 | 2400-2700mm Diameter Tape |
PI-M-10 | 2700-3000mm Diameter Tape |
PI-M-11 | 3000-3300mm Diameter Tape |
PI-M-12 | 3300-3600mm Diameter Tape |
Standard clock steel will be supplied unless specified otherwise. | |
to order Stainless Steel add SS to end of part number |
Extra Large Diameter Inch size tapes over 144" diameter ( special order )
1095 Spring Steel | |
(black numbers on silver) | |
Diameter Range O.D. | Part# |
144" - 156" | P13 |
156" - 168" | PI-14 |
168" - 180" | PI-15 |
180" - 192" | PI-16 |
192" - 204" | PI-17 |
204" - 216" | PI-18 |
216" - 228" | PI-19 |
228" - 240" | PI-20 |
240" - 252" | PI-21 |
252" - 264" | PI-22 |
264" - 276" | PI-23 |
276" - 288" | PI-24 |
288" - 300" | PI-25 |
300" - 312" | PI-26 |
312" - 324" | PI-27 |
324" - 336" | PI-28 |
336" - 348" | PI-29 |
348" - 360" | PI-30 |
360" - 372" | PI-31 |
372" - 384" | PI-32 |
384" - 396" | PI-33 |
396" - 408" | PI-34 |
408" - 420" | PI-35 |
420" - 432" | PI-36 |
432" - 444" | PI-37 |
444" - 456" | PI-38 |
456" - 468" | PI-39 |
468" - 480" | PI-40 |
480" - 492" | PI-41 |
492" - 504" | PI-42 |
504" - 516" | PI-43 |
516" - 528" | PI-44 |
528" - 540" | PI-45 |
Standard tapes are manufactured with a 1/4" wide Vernier Gage, a 1/2" wide Main Body and a 1/4" wide Gage Member | |
Calibration Report traceable to N.I.S.T. furnished with each new tape at no additional charge. | |
Our calibration lab is compliant with ANSI/NCSL Z540-1-1994, ISO/IEC 17025, ISO 10012-1, MIL-STD 45662A and 10CFR21 | |
Tolerances for standard range tapes (12" of usable range) listed above | |
Tape sizes between 144" - 216" .003" tolerance | |
Tape sizes between 216" - 288" .005" tolerance | |
Tape sizes between 288" - 360" .006" tolerance | |
Extra Large Diameter Metric sizes tapes over 3600mm diameter ( special order )
Materials Available | 1095 Spring Steel |
(black numbers on silver) | |
Diameter Range O.D. | Part# |
3600-3900mm | PI-M-13 |
3900-4200mm | PI-M-14 |
4200-4500mm | PI-M-15 |
4500-4800mm | PI-M-16 |
4800-5100mm | PI-M-17 |
5100-5400mm | PI-M-18 |
5400-5700mm | PI-M-19 |
5700-6000mm | PI-M-20 |
6000-6300mm | PI-M-21 |
6300-6600mm | PI-M-22 |
6600-6900mm | PI-M-23 |
6900-7200mm | PI-M-24 |
7200-7500mm | PI-M-25 |
7500-7800mm | PI-M-26 |
7800-8100mm | PI-M-27 |
8100-8400mm | PI-M-28 |
8400-8700mm | PI-M-29 |
8700-9000mm | PI-M-30 |
9000-9300mm | PI-M-31 |
9300-9600mm | PI-M-32 |
9600-9900mm | PI-M-33 |
9900-10,200mm | PI-M-34 |
10,200-10,500mm | PI-M-35 |
10,500-10,800mm | PI-M-36 |
10,800-11,100mm | PI-M-37 |
11,100-11,400mm | PI-M-38 |
11,400-11,700mm | PI-M-39 |
11,700-12,000mm | PI-M-40 |
12,000-12,300mm | PI-M-41 |
12,300-12,600mm | PI-M-42 |
12,600-12,900mm | PI-M-43 |
12,900-13,200mm | PI-M-44 |
13,200-13,500mm | PI-M-45 |
Standard tapes are manufactured with a 6.35mm wide Vernier Gage, a 12.7mm wide Main Body and a 6.35mm wide Gage Member | |
Calibration Report traceable to N.I.S.T. furnished with each new tape at no additional charge. | |
Our calibration lab is compliant with ANSI/NCSL Z540-1-1994, ISO/IEC 17025, ISO 10012-1, MIL-STD 45662A and 10CFR21 | |
Tolerances for standard range tapes (300mm of usable range) listed above | |
Tape sizes between 3600-5400mm .09mm tolerance | |
Tape sizes between 5400-7200mm .14mm tolerance | |
Tape sizes between 7200-9000mm .18mm tolerance |
To Read Outside Diameter Tapes
How to use the tape | |
TAPES GRADUATED IN INCHES | |
Standard width is 1/4" gage member. 1/8, 3/8 or 1/2" widths also available - extra charge per tape. | Vernier scale divides each graduation on tape body into 25 parts or .001 of an inch |
Example: | |
In the illustration the divisions to the left of the Vernier zero are 20 inches plus 1 division, or 20.025. The 15th line on the Vernier coincides with a line on the Gage Member. This is added to the 20.025, making a total diameter reading of 20.040, which is the true diameter reading as measured on the outside circumference. When reading the tape, apply a snug pull of 5 lbs. tension, first making sure the tape and part have been properly cleaned. When using a standard O.D. tape on an I.D. surface, add double the tape thickness to the reading to arrive at the I.D. of the part (0 lbs. tension). It is suggested that direct I.D. tapes be used for Inside Diameter readings. | |
Instructions on how to measure with Pi Tape® Inch Outside Diameter tapes on YouTube | |
TAPES GRADUATED IN MILLIMETERS | |
Standard width is 6.35 mm gage member. 4.76, 9.53 or 12.70 mm widths also available - extra charge per tape | |
Each line on the Gage Member of the tape represents
.5mm of Diameter, while each line on the Vernier represents .01mm.
The zero on the Vernier is past the 661.5 line on the Gage Member
of the tape. Now find the line on the Vernier which corresponds
exactly with the line above. The example shows it to be the 23
line which equals .23mm. This added to the 661.5 reading gives
an outside diameter of 661.73mm. As a suggestion for checking very large diameters-pieces of masking tape may be used to hold the tape in proper parallel position. |
|
Instructions on how to measure with Pi Tape® Metric Outside Diameter tapes on YouTube | |
Care
When not in use, wipe clean and apply a light rust preventive
oil. Store in tape container.
No periodic adjustments are needed.
Make sure the tape has not been stepped on or kinked, which may
destroy the accuracy.
link to Digital pi tape page
link to Special pi tape page
Precision O-Ring Inside Diameter tapes
are specifically designed to achieve quick, accurate inside diameter measurements of O-Rings and other soft-walled parts.
Trademarks are the properties of their respective owner(s).