The standard material thickness that can be evaluated with the Taber Rotary Platform Abraser is 6.5 mm. For materials greater than 6.5 mm but less than 12.5 mm, the S-21 extension nut may be used. Specimens with a thickness greater than 12.5 mm can be tested using the arm height extension kit.
The width of the "Taber Test" wear path is 12.7 mm, and located 31.75 mm from the center of the specimen. For most rigid materials, a sample approximately 100 mm square is recommended. If the specimen is less than the suggested size, it is possible to position two or more specimens on a mounting card to meet the size requirement, or use the Sliding Mount specimen Holder. If the edges are not flush together or if the samples are of different thickness, the edges may wear at a different rate than the rest of the specimen. Flexible specimens are typically circular and require the use of the clamp ring. If a mounting card is used, the specimen should be approximately 108 mm in diameter. If no mounting card is used, a 135 mm specimen is required such that the clamp ring will grip the overlapped material.
To expand the versatility of the Taber® Rotary Abraser (Abrader), mounting options and interchangeable specimen tables are available to evaluate materials not easily tested with the standard configuration.
Mounting Cards / Sheets
When testing textile and other flexible test specimens, a Mounting Card may be useful to prevent wrinkling while undergoing testing. Made from rigid card stock, mounting cards are coated on one side with pressure sensitive adhesive to affix to the specimen. A test record form is printed on the backside for permanent record of the test. Taber mounting cards are available as square (S-36) or round (S-36-1).
Mounting Sheets are coated on both sides with pressure sensitive adhesive. Used to provide a non-slip attachment of the specimen to the surface of the turntable, mounting sheets are especially useful for materials difficult to drill a center hole (such as glass or ceramics). Mounting sheets are available as square (S-37) or round (S-37-1), and have a test record printed on both sides enabling them to be used as a mounting card.
The specimen holder equipped with the Taber Rotary Abraser (Model SH-125) has been designed to accommodate most materials that are less than 6.5 mm thick. A 6.5 mm center hole must be punched or drilled in the specimen so it can be securely fastened to the threaded center post with the clamp plate and nut. For flexible materials, also use the supplied specimen hold-down ring "A" (SH-101). A replaceable rubber pad (S-19) is provided to ensure a non-slip surface.
All Taber Abraser specimen holders are engineered with an innovative design that allows quick mounting and removal from the motor shaft. This enables the holder to be removed from the instrument so specimens can be inspected more closely.
NOTE: Specimen holders designated with Model "SH" are intended for use with Taber Abraser models 1700 or 1750. Specimen holders designated with Model "E" are intended for all other models of Taber Abrasers. The "E" style specimen holders are engineered with a ball plunger and drive pin spring clutch that locks the holder onto the motor shaft.
Tall (SH-12) - Similar to the standard specimen holder SH125, but sits 6.5 mm higher.
Textile, Tensioning Type (Model SH-15) or (Model E140-15) - Similar to the standard specimen holder but with a raised wear track. This gives textile or other flexible material additional tension when the clamp ring is drawn down over the edge of the holder and the clamp plate is tightened in the center recess. Requires a 135 mm diameter specimen with a 6.5 mm center hole. This holder is not recommended for use with rigid specimens or with mounting cards.
Drive-Pin Type (Model SH-19) or (Model E140-19) - Intended for rigid, square specimens that do not have a center-mounting hole. One corner of the specimen is positioned between two pins while two adjustable clamps are used to secure the specimen in place. This prevents the specimen from slipping while the test is being conducted.
Sliding Mount (Model SH-26) or (Model E-140-26) - This holder is designed to test small, rigid materials. With two adjustable slide mounts, four 50 mm square samples can be mounted to this table. To accommodate the threaded center post, one corner of each specimen must be trimmed.
Rimmed (Model SH-75) or (Model E140-75) - Includes a 7.5 mm raised rim for retaining liquids during a test. A rubber pad is adhered to the table to prevent specimens from slipping during the test. This holder is used for wet testing materials to determine the effect of absorbed and / or surface moisture on abrasion resistance. To prevent splash over on the instrument, use only a sufficient amount of liquid to cover the specimen. Specimens may be up to 140 mm diameter.
The following specimen holders are not available for Taber Abrasers Model 1700 or 1750
Specimen Holder with Ring Clamp (Model E140-14) - Used with rigid specimens that are slightly warped, and less than 6.35 mm in thickness. Eight (8) screws are spaced evenly on the clamp plate, and when tightened, will correct for slightly warped conditions. This holder can be furnished with (E140-14-S) or without (E-140-14-NS) a center clamping screw. Specimens should be approximately 102 mm in diameter with a 6.5 mm center hole.
Textile, Tensioning Type for Wet or Dry Testing (Model E140-18) - Designed to give an initial stretch to woven fabrics so that they may be tested while moist with minimum tendency to wrinkle. A raised wear track provides additional tension on the specimen, while a 9.53 mm rim helps retain any liquid.
Threaded Ring (Model E140-21) - A clamp plate and flanged clamp ring are incorporated to test slightly warped, rigid specimens. The ring is threaded to the body of the holder, which securely clamps the outer edges of specimens up to 137 mm diameter.
Transparent Base (Model E100-10) - Manufactured with a transparent base and recommended to be used with the E100-102 clamp ring. When evaluating textile specimens, the table may be removed from the Abraser to view the abraded specimen against a strong light source to determine the worn condition of the threads. This eliminates the need to remove the specimen from the holder permitting the test to be continued if desired.
Multiple Specimen Holder (Model E3945) - Divided into sections, this specimen holder permits eight samples to be tested simultaneously for quick comparisons. Intended for nylon hosiery and lightweight fabrics, the normal test load used with this table is 125 or 250 grams. A template is provided as a guide to cut specimens to the proper size.
Specimen Table Accessories
Clamp Plate (S-23) - When using the Scuffing Attachment to test carpeting and other floor covering materials, a smaller clamp plate with 31.75 mm (1 1/4") diameter is available. The smaller diameter helps to prevent crushing of the specimen fibers near the wear path.
Clamp for CD/Blu Ray Discs - Permits mounting of CDs, DVDs, and Blu Ray Discs to the Taber Abraser. The clamp plate has a 0.75 mm raised shoulder that is approximately 15 mm in diameter to ensure the disc is secured to the center of the specimen holder.
Specimen Clamp Rings - Two specimen clamp rings are available for the Taber Rotary Platform Abraser. The standard clamp ring provided with the instrument is Model SH-101 (for older style abrasers reference E100-101). This has a 108 mm I.D. and is designed for flexible materials up to 0.8 mm thick. With a 110 mm I.D., Model SH-102 (for older style abrasers reference E100-102) will accommodate flexible materials up to 1.6 mm thick. SH-102 (E100-102) is also referenced as clamp ring "B".
Extension Nut (S-21) - To secure specimens that are 6.5 mm to 12.5 mm thick, the S-21 extension nut should be used. A 9.5 mm center hole must be drilled into the specimen to accommodate the longer shoulder.
Arm Height Extension Kit
The Arm Height Extension kit was engineered to accommodate specimens that exceed the 12.5 mm thickness (up to 40mm). This kit raises the position of the abrader arms and allows for the correct alignment and positioning of the abrasive wheels. An extension post is threaded to the turntable and by using the appropriate combination of turntable shims, the proper arm position relative to the specimen can be maintained. Intended for rigid materials, a 13mm center hole must be drilled in each specimen.
Arm Height Extension Kit (Model 1700-40) is intended for Taber Abraser Model 1700 or 1750, and can be installed by the operator. For older style Taber Abrasers, arm height extension kits are available for either single or dual turntables and include the arm height extenders, turntable adaptor and a set of 6 shims. *For older style Abrasers, it is necessary to return your instrument to Taber Industries or an authorized distributor for installation and calibration.