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| Model P-A-T Paint Adhesion Test Kit |
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 to view the Variable Spaced Multi-Tooth Cutter |
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The P-A-T Paint Adhesion Test Kit produced by Gardco contains all of the tools and materials needed, except for the multi-tooth cutter blade, for conducting adhesion tests on paints applied to a flat, uniform surface in accordance with ASTM Test Method D 3359, method B and DIN Standard No. 53151. The multi-tooth cutter blade is furnished separately to permit choice among the various available designs.
Due to the accuracy of the spacings and the speed with which the test can be conducted, the multiple tooth cutter is the preferred tool for use in this test except when evaluations must be made on coatings applied to surfaces which are neither flat or relatively smooth. Under these adverse
conditions a single razor blade type cutter is often desirable under method A of ASTM. A Multi-Tooth Adhesion Cutter for pipe is also available.
Multiple tip cutters are available with guide teeth and six spaced teeth at 1.0 and 2.0mm. The 1.0mm spacing is also available with eleven teeth and guide teeth. Available without guide teeth are cutters with eleven spaced teeth at 1.5mm. Also note other cutter blades illustrated in the dimensional drawings. (Ask for information on special variable spaced cutters and cutters for curved surfaces.) |
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The kit includes the new blade holder / handle, with nylon protector and guide, hex wrench for changing blades, flaking brush, illuminated magnifier with batteries, tape - LA-26*, copy of ASTM Test Method D-3359 for use as as instruction guide, and a sturdy plastic carrying case with handle. All of the components are nested in laminated diecut foam within the case. |
* Permacel #99 test tape no longer available. Currently supplying LA-26 Polyester Rope Fiber Laminate.
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| Item Number PA-2000, P-A-T Kit with Carry Case. Note well-made carrying case that holds Cross-Cut Tester and all accessories. |
- The test specimen should be prepared as outlined in ASTM D 3359.
- When positioning the blade in the handle make sure the holes face the securing set screws taking care not to over tighten.
- Place the cutter assembly on the test specimen so that it rests on the nylon protector and the rear (narrow end) of the handle.
- Grasp the handle and rotate it upward with respect to the line of contact of the nylon guide with the test surface. During this motion, the tips of the cutter first contact the test surface when the top of the handle is about seven degrees with respect to the test surface. Continue this motion until the top surface of the handle is elevated to about 15 degrees. This is the correct attitude of the cutter assembly for the test.
- With enough pressure on the handle to insure that all of the cutter tip penetrates to the test specimen supporting base, pull the assembly along the test surface through 0.75 to 1.00 inch. Repeat this procedure with a second cut intersecting the first pattern at 90° (±5°). Evaluate results of the test as indicated in ASTM D 3359,
method B.
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| Tips On the Use of Cross Cut Blades |
| Before shipment, our blades must pass a cutter blade tooth accuracy inspection check. You can periodically check the accuracy of your cutter blade in the same manner. Use a small piece of polished plate glass. With a match or lighter, smoke a portion of the glass. This will leave an extremely black thin film. With the blade mounted in the handle, pull it across the film. All teeth should make tracks. If all teeth do not touch when used on a coated panel it will indicate that the panel surface is not plane or one or more of the teeth have been damaged. |
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| Some customers using the cross-cut (or cross-hatch) adhesion blades have had problem getting all the teeth to cut evenly through their coating. From our experience, we have found that uneven cutting is usually due to warped panels. When using the crosscut blades, it is important that the panel being scratched be supported by a flat, rigid table or surface. Additionally, sufficient force must be used for the blades to cut completely through the coating. Often this is a catch-22 situation. If your panel is not supported sufficiently, then more applied pressure simply bends the panel. |
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The multiple tip cutters for the Paint Adhesion Test Kit are specially designed to provide optimum results. Not only are they produced to very close tolerances but also, as a final step in production they are given a black oxide coating (bluing) to prevent rusting.
Handle mounting holes do not go all the way through the cutter. This prevents the cutter from being improperly secured in the handle. The holes must face the securing set screws.
Pictured left is the P.A. Handle with Multiple Cutter Tips. |
A further very important improvement to the multiple tip cutter is not immediately apparent. Even with the best possible production tools and procedures, it is very difficult to hold the tolerance on individual tooth length closer than ±0.0005 inches. Even this very small variation is just not good enough for best results from the test. An additional last step in the production process provides essentially zero tolerance on blade length.
The cutters are first produced to insure a normal cut. This is then followed by a fine lateral honing which slightly modifies the teeth. There are Several Advantages: The teeth are stronger and less subject to damage. There is a cleaner edge cut where the coating interfaces with the supporting base. Cutter life is increased. The tolerance on tip length is greatly improved permitting lower pressure to be used on the cutter and avoiding gouging of the supporting base with a long tip. |
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| Note: For 2.0mm blade, the two outer "outrigger" teeth are for stability only |
| New 5-Tooth Adhesion Cutter With 5mm Spacing |
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PA-2253 (5 Tooth 5.0mm Cutter)
For Conducting adhesion tests on coatings having a thickness greater than 5 mils (0.005") (125 microns). |
| New 11-Tooth Adhesion Cutter With 2MM Spacing |
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PA-2055 (11 Tooth 2.0mm Cutter) |
| New 16-Tooth Adhesion Cutter With 1.6mm Spacing |
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PA-2257 (16 Tooth, 1.6mm spacing) |
| Variable Spaced Multi-Tooth Adhesion Cutter PA-2050 |
| The most popular multiple tooth adhesion cutters and related items now in use are those designed, manufactured and sold by the Paul N. Gardner Company. These cutters are available with the following tooth spacing which provides a crosshatch of segments with the indicated area: |
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| Tooth Spacing mm |
Segment Area Square mm |
| 1.00 |
1.00 |
| 1.50 |
2.25 |
| 2.00 |
4.00 |
| 3.00 |
9.00 |
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The variable spaced multiple tooth cutter has 14 teeth providing 13 spaces between the teeth ranging from 0.46 mm to 2.58 mm.
This spacing provides segment
areas ranging from 0.21 square mm to 6.66 square mm. At the left below is a sketch of the cutter and at the right is shown a pattern of the crosshatch cuts obtained. |
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| Segment Area Table |
The following table shows the segment area in square mm for each of the segments in the variable spaced
multi-tooth crosshatch pattern. |
| Tooth
Spacing in mm |
0.46 |
0.53 |
0.61 |
0.71 |
0.82 |
0.94 |
1.09 |
1.26 |
1.45 |
1.68 |
1.94 |
2.24 |
2.58 |
Segment Area in
Sq. mm |
1.19 |
1.37 |
1.57 |
1.83 |
2.12 |
2.43 |
2.81 |
3.25 |
3.74 |
4.34 |
5.01 |
5.78 |
6.66 |
| 1.03 |
1.18 |
1.36 |
1.59 |
1.83 |
2.10 |
2.44 |
2.82 |
3.24 |
3.75 |
4.34 |
5.01 |
5.77 |
| 0.89 |
1.03 |
1.18 |
1.37 |
1.59 |
1.82 |
2.11 |
2.44 |
2.81 |
3.25 |
3.75 |
4.33 |
4.99 |
| 0.77 |
0.89 |
1.02 |
1.19 |
1.37 |
1.58 |
1.83 |
2.11 |
2.43 |
2.82 |
3.25 |
3.75 |
4.32 |
| 0.67 |
0.77 |
0.89 |
1.03 |
1.19 |
1.36 |
1.58 |
1.83 |
2.11 |
2.44 |
2.82 |
3.25 |
3.75 |
| 0.58 |
0.67 |
0.77 |
0.89 |
1.03 |
1.18 |
1.37 |
1.58 |
1.82 |
2.11 |
2.44 |
2.82 |
3.24 |
| 0.50 |
0.58 |
0.66 |
0.77 |
0.89 |
1.02 |
1.19 |
1.37 |
1.58 |
1.83 |
2.11 |
2.44 |
2.81 |
| 0.43 |
0.50 |
0.58 |
0.67 |
0.77 |
0.89 |
1.03 |
1.19 |
1.37 |
1.58 |
1.83 |
2.11 |
2.43 |
| 0.38 |
0.43 |
0.50 |
0.58 |
0.67 |
0.77 |
0.89 |
1.03 |
1.18 |
1.37 |
1.58 |
1.83 |
2.11 |
| 0.33 |
0.37 |
0.43 |
0.50 |
0.58 |
0.66 |
0.77 |
0.89 |
1.03 |
1.19 |
1.37 |
1.58 |
1.82 |
| 0.29 |
0.33 |
0.38 |
0.44 |
0.51 |
0.58 |
0.68 |
0.78 |
0.90 |
1.04 |
1.20 |
1.39 |
1.60 |
| 0.23 |
0.27 |
0.31 |
0.36 |
0.41 |
0.47 |
0.55 |
0.63 |
0.73 |
0.85 |
0.98 |
1.13 |
1.30 |
| 0.21 |
0.24 |
0.28 |
0.33 |
0.38 |
0.43 |
0.50 |
0.58 |
0.67 |
0.77 |
0.89 |
1.03 |
1.18 |
| Radiused Tooth Adhesion Cutter for Pipe |
| Multi-tooth adhesion cutters available to date may be used only on materials applied to a
flat surface. There have been numerous requests, however, for adhesion cutters for use on
uniform curved surfaces such as pipe. The uniform 1 mm six tooth cutter is now available for
use on such surfaces where the radius of curvature is no less than 0.75 inches. The dimensions for a cutter to be used on 0.75 inch radius pipe is shown in the following sketch: |
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This special cutter for materials
applied to simple curved surfaces
is produced from a modified
standard multi-tooth cutter. The
rake angle (the angle of the tooth
tip to the back of the cutter) is
accurately known.
Therefore, by
removing a portion of the front
surface of the cutter, the tooth is
shortened by a known amount. Since the shortening of the tooth
is proportional to the thickness of
cutter removed, the cutter may be
produced to work on any given
radius of curvature above a practical limit of 0.75 inches. |
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The cutter for curved surfaces is mounted in the
same size and style of handle as all other GARDCO
multi-tooth adhesion cutters. The handle, however, is special in that the center portion of the
nylon protector is removed to assist in correctly
orienting the cutter on the curved surface. |
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Prices subject to change  Prices listed in US dollars for domestic shipments within US, Canada, & Mexico only Export orders require quotations - click here for a quote For more info call us 1-800-762-2478 or 954-946-9454. |
| Item Number |
Item |
Prices |
| PA-2000 Kit |
| PA-2000 |
Kit includes blade holder / handle, with nylon protector and guide, hex wrench for changing blades, flaking brush, illuminated magnifier with batteries, tape - LA-26*, copy of ASTM Test Method D-3359 for use as an instruction guide, and a sturdy plastic carrying case with handle. Without blade [choose one (1) variable spaced cutter below] |
$139.95 |
| Extra Blades (Specify Teeth Spacings) |
| PA-2052 |
Fine Blade (1.0mm spacing) Six Teeth |
75.00 |
| PA-2053 |
Fine Blade (1.0mm spacing) Eleven Teeth |
79.00 |
| PA-2054 |
Medium Blade (1.5mm spacing) Eleven Teeth |
79.00 |
| PA-2055 |
11 Tooth, 2mm Special Coarse Blade |
138.00 |
| PA-2056 |
Coarse Blade (2.0mm spacing) Six Teeth |
75.00 |
| PA-2057 |
Very Coarse Blade (3.0mm spacing) Six Teeth |
75.00 |
| PA-2251 |
Coarse Blade (2.4mm or 3/32"spacing) Four teeth |
79.00 |
| PA-2253 |
Thick Coatings (5.0mm spacing) Five Teeth |
101.00 |
| PA-2257 |
1.6mm, 16 Tooth, API RP 5L2 |
180.00 |
| Variable Spaced Blade |
| PA-2050 |
Fourteen Tooth Variable Spaced Cutter |
96.00 |
| PA-7000 Kit |
| PA-7000 |
Kit includes (1) PA-2058 & (1) PA-7074 blade holder / handle, with nylon protector and guide, hex wrench for changing blades, flaking brush, illuminated magnifier with batteries, tape - LA-26*, copy of ASTM Test Method D-3359 for use as an instruction guide, and a sturdy plastic carrying case with handle. Kit without blade [choose two (2) cutters for curved surfaces below] |
256.00 |
| Radiused Blades (Made to Order) |
| 7000 Series Blades: |
(Specify Any Radius Above 0.75 Inches) Note: Cutters are available
only in pairs, made to order on radius specification. |
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| EXAMPLE: |
PA-7150 - Two (2) Six Tooth Blades, 1 mm Spacing,
1.5" Radius Cutter |
498.00 |
| All GARDCO blades qualify under MIL STD 45662A and conform to ISO 9000 when ordered with calibration certification (Add /C to blade order number) add $165.00 to price. |
| Replacement Parts |
| PA-2058 |
Blade Handle with Clamp Screws & Hex Wrench
(For Variable Spaced Cutters) |
99.00 |
| PA-2060 |
Blade Handle with Clamp Screws
& Hex Wrench (For Radius Cutters) |
125.00 |
| PA-2060 |
Clamp Screws (2) |
5.00 |
| PA-2062 |
Hex Wrench |
2.00 |
| PA-2802 |
Illuminated Magnifier, No. M-7 with Batteries |
11.00 |
| PA-2810 |
Rugged Carrying Case with laminated die-cut foam insert |
29.50 |
| PA-2804 |
Brush, scrub brush |
7.50 |
| PA-280626 |
Roll Tape -LA-26* (Polyester Rope Fiber Laminate) Adhesion Test Tape |
18.50 |
| PA-284105 |
Roll Tape - Nichiban PAT Tape |
15.95 |
| PA-2808 |
ASTM D 3359 Reprint |
15.00 |
| * Permacel #99 test tape no longer available. Currently supplying LA-26 Polyester Rope Fiber Laminate. Click here for more information. |
| Disclaimer: Although Paul N. Gardner Company, Inc. has attempted to provide accurate information, the
Paul N. Gardner Company, Inc. assumes no responsibility for the accuracy of the information. |
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