• Automotive Safety Glazing
• Ceramic Tile
• Coated Optics
• Concrete
• Dimensional Stone
• Glass
• Porcelain Enamel
• plus others

Glass – Abrasion Resistance
Specimen: 4 inches square, must have a flat, even surface and run true
Wheels and Load: H-18 or H-10 Calibrade wheel with 500 or 1000 gram load, whichever combination is best suited to the desired rate of abrasion
Evaluation: By comparison of the number of wear cycles necessary to produce an equal degree of abrasion with that of a standard of similar material tested under identical conditions

Safety Glazing Materials
Specimen: 4 inches square with ¼ inch center hole
Wheels and Load: CS-10F with 500 gram load
Evaluation: Change in haze
Remarks: Reface wheels with fine side of ST-11 refacing stone

Ceramic Finishes
Specimen: 4 inches diameter or square, with ¼ inch center hole
Wheels and Load: CS-17 Calibrase with 500 or 1000 gram load
Evaluation: Visual end point, at the first sign that the wheels have worn through the surface glaze

Porcelain Enamel
Specimen: S-16 or similar plate (4 inches square with ¼ inch center hole)
Wheels and Load: CS-17 with 1000 gram load
Evaluation: Number of cycles to a visual end point determined by the first sizeable scratch as the wheels begin to penetrate the surface glaze. Also comparison with a standard of the same material tested under identical conditions. If desired, the test may be continued to a more advanced end point than the first sizeable scratch.
Remark: The hardness and density of porcelain enamel makes them highly resistant to abrasion and scratching. Because of the similarity of porcelain glaze with glass, the abrading action of the Calibrase wheels is barely noticeable in the early stages of the test although material is being slowly removed. After a time, however, the wheels begin to abrade through the surface glaze and penetrate the coarse substrate.
Remark 2: Porcelain enamel frit may be sprayed on S-16 plates for testing or specimens may be cut either before or after firing from multiple sheets. Shearing and punching of the plates is likely to cause some shattering of the enamel, this is permissible if it does not extend into the path of the wheels.
Remark 3: Special care must be taken to avoid warping the plates in firing, since flatness of the specimen is essential to accurate test results. Should the 20 gage S-16 specimen plate prove too thin to withstand the heat without warping, use heavier metal for plates.
reface wheels with fine side of ST-11 refacing stone

Concrete Floors
Specimen: 4 inches diameter or square, with ¼ inch center hole
Wheels and Load: H-22 Calibrade with 500 or 1000 gram load
Evaluation: Weight loss method, maximum depth of penetration recommended is 1/32 inch
Remark 1: Test is for abrasion resistance of cement floor hardeners or surface coatings
Remark 2: The specimen must be carefully molded for uniform thickness and smooth surface to provide continuous, even contact with the abrading wheels.

General Notes

• To generate useful data, specimens must be flat. Specimens of uneven thickness should be shimmed so that the top surface runs true.
• A Drive Pin Type Holder (E140-19) can be used to eliminate the need for the center hole. Specimens are attached with S-37 or S-37-1 mounting sheets and two driving pins prevent slipping.
• The recommended specimen thickness is 6.35mm (¼ inch). Using the S-21 Extension Nut, specimens up to 12.7mm (½ inch) in thickness can be evaluated. An Arm Height Extension modification (Available from Taber Industries or Taber Distributors) will permit testing up to 40mm in thickness.
• To subject specimens to a wet abrasion test, the Rimmed Specimen Holder (E140-75) can be used. This is useful to determine the effect of absorbed and / or surface moisture on abrasion resistance.