The Grit Feeder is a freestanding instrument that requires a Taber Rotary Platform Abraser (not included) to conduct testing. The grit distributor nozzle is positioned over the Taber Abraser specimen in front of the right abrasive wheel. During the test, abrasive grit particles are deposited uniformly and continuously onto the specimen surface. As the specimen holder rotates, the loose grit particles pass under a pair of S-39 Leather-Clad Wheels. The resulting rolling action of the particles serves as the abradant and contributes to the physical breakdown of the material. The vacuum hose from the Taber Abraser is inserted into the base of the Grit Feeder allowing a pickup tube to be positioned such that grit particles and debris are removed. The operation of the grit feeder is controlled through the Taber Abraser, ensuring that the turntable, grit distribution and vacuum suction are actuated at the same time.
IMPORTANT: Due to the type & quantity of abrasive media that is used during this testing, Taber recommends that you frequently inspect the vacuum filter and collection bag and replace when necessary.
Abradants
The standardized abradant supplied with Taber's Grit Feeder is a #240 aluminum oxide grit particle (Model S-41). Produced specifically for Taber Industries, this aluminum oxide has tighter controls for both particle size analysis and bulk density properties compared to "off-the shelf" aluminum oxide. To calibrate the rate of flow and to measure the abrasive rate of the abradant, S-38 Standardization Plates are utilized.
Prior to use, the abrasive grit should be screened through U.S. Standard Sieve No. 80 to break up any conglomerates and to remove any oversized or foreign particulate matter. Afterwards, dry the grit for 1 hour at approximately 82 C (180 F). Allow to cool in a temperature and humidity controlled room prior to use.
To satisfy test method EN 14354 and ISO 24338 Method B, Alodur ESK 240 aluminum oxide grit should be used. Contact Taber Industries for additional information.
Mr. Sunil Borse (Polytech Instruments Pvt.Ltd.)
1112, 11th Floor, Solus, Hiranandani Estate, Ghodbunder Road, Thane, Maharashtra - 400607, India
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