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Model P-A-T Paint Adhesion Test Kit


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.
PAT Kit PAT Kit PAT Kit
PAT Kit PAT Kit PAT Kit
PAT Kit PAT Kit PAT Kit
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 the Gardco Paint Adhesion Test Kit with Single razor Blade Type Cutter and specially designed Gardco Temper II Gauge should be used. 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.)


P-A-T Kit with Carry Case

 

 

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 - Permacel #99 (72 yards), 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.

Item Number PA-2000, P-A-T Kit with Carry Case. Note well-made carrying case that holds Cross-Cut Tester and all accessories.

 

Operation

  1. The test specimen should be prepared as outlined in ASTM D 3359.
  2. Place the test specimen on a smooth flat base to insure adequate support.
  3. Place the cutter assembly on the test specimen so that it rests on the nylon protector and the rear (narrow end) of the handle.
  4. 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.
  5. 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°). Evalute results of the test as indicated in ASTM D 3359,
    method B.
Cutter Cutter
Cutter Cutter

 

Classification chart

Classification Chart

 

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.

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.
Drawing, Cross-Cut Blade
Drawing, Cross Cut Blade



Improvements

 

Paint Adhesion Handle with Blades
P.A. Handle with Multiple Cutter Tips
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.

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.

 

Cutter Blade Dimensions

 

PA-2251 PA-2052
PA-2053 PA-2054
PA-2056 PA-2057
   
 
Note:  For 2.0mm blade, the two outer "outrigger" teeth are for stability only

 

New 5-Tooth Adhesion Cutter With 5mm Spacing
New 5-Tooth Adhesion Cutter with 5mm Spacing

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
PA-2055  PA-2055 (11 TOOTH 2.0mm CUTTER)

 

New 16-Tooth Adhesion Cutter With 1.6mm Spacing
PA-2257 (16 Tooth, 1.6mm spacing) PA-2000 2257 Blade

 

Items And Accessories
Item Number Item
PA-2000 PAT-Paint Adhesion Test Kit (Blades sold Separately, see "Blades" Below), Carry Case, Permacel #99 Adhesion Test Tape, Handle/Blade Holder, Hex Wrench.
Blades
Item Number Spacing
in MM		 Spacing in inches
(if applicable)		 Number
of teeth		 Description
PA-2052 1.00mm   Six Fine Blade
PA-2053 1.00mm   Eleven Fine Blade
PA-2054 1.5mm   Eleven Medium Blade
PA-2054/TC Same as PA-2054 above, with Carbide Tip
PA-2055 2.0mm   Eleven Special Coarse Blade
PA-2056 2.0mm   Six Coarse Blade
PA-2057 3.0mm   Six Very Coarse Blade
PA-2251 2.5mm 3/32" Four Coarse Blade
PA-2253 5.0mm   Five Thick Coatings
PA-2257 1.6mm 1/16" Sixteen API RP 5L2
All GARDCO blades qualify under MIL STD 45662A and conform to ISO 9000 when ordered with calibration certification (add /C to blade order number). Call for cost.
Replacement Parts
PA-2058 Handle/Blade Holder with clamp screws
PA-2060 Clamp Screws (2)
PA-2062 Hex Wrench
PA-2802 Illuminated Magnifier, No. M-7 with Batteries
PA-2804 Scrub Brush
PA-2806 Roll Tape - Permacel #99 Adhesion Test Tape
PA-284105 Roll Tape - Nichiban PAT Tape
PA-2808 ASTM D 3359 Reprint
PA-2810 Rugged Carrying Case with laminated die-cut foam insert

 

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