Model 1700 / 1750 Rotary Platform Abraser
19
Operating Instructions ver. 1.0
p/n 135505
10. After completion of test cycles, remove and
clean test specimen.
11. Evaluate and record intermediate or final
values based on method selected for reporting
test result. For weight loss, weigh specimen to
nearest 0.1 mg. For visual comparisons,
examine test surface and note characteristics.
WARNING:
When testing flexible materials, trim
any excess material overhanging the specimen
holder or hold-down ring. Otherwise, the material
may rub on the abraser housing and cause
damage.
NOTE:
During usage, the abrasive wheels will break
down causing the diameter to change. Wheels must be
replaced when the diameter wears down to the wheel
label (44.4 mm).
NOTE:
The PAUSE INTERVAL will stop the test at
predetermined number of cycles and is useful for tests that
require the abradant to be refreshed or to evaluate the
specimen during the test (e.g. visual inspection of wear-
through
to
the
substrate
or
periodic
weight
measurements).
CALCULATION OF RESULTS
The following are commonly used methods for
reporting abrasion test results. For comparable and
reproducible tests, it is recommended that all
testing be performed under conditions covered by
an established test procedure.
Weight Loss
The weight loss test method is a quantifiable
method that records the weight loss of the test
specimen due to abrasion. This method is
recommended when the results are to be compared
with those of similar materials having nearly the
same specific gravity.
Weigh the test specimen before and after testing to
obtain the initial and final weight values. The
difference between these two values,
F
Total
, will be
the weight loss.
𝐹
𝑡𝑜𝑡𝑎𝑙
= 𝐴 − 𝐵
Where, A = weight of test specimen before abrasion, mg
B = weight of test specimen after abrasion, mg
Use the following formula to calculate average
mass loss,
F
m
, in milligrams (mg) per 100 cycles:
𝐹
𝑚
=
𝐹
𝑡𝑜𝑡𝑎𝑙
𝑛
𝑥100
Where, n = total number of cycles
When performing the weight loss method, loose
particulate may adhere to specimens during testing.
It is critical that test specimens are cleaned prior to
weighing. If a sample has been wet tested or if an
indicator has been used, ensure the specimen is
thoroughly dried. If static electricity affects the
specimen, a static eliminator may be sprayed on
both sides prior to taking the final measurement.
Taber Wear Index may also be used to present
weight loss data. This measurement represents the
loss in weight in milligrams per thousand cycles of
abrasion
for a test performed under a specific set of
conditions. The lower the wear index, the better the
abrasion resistance quality of the material.
𝑇𝑎𝑏𝑒𝑟𝑊𝑒𝑎𝑟 𝐼𝑛𝑑𝑒𝑥 =
𝐹
𝑡𝑜𝑡𝑎𝑙
𝑥 1000 𝑐𝑦𝑐𝑙𝑒𝑠
𝑛
For example: if a specimen is abraded 5000 cycles
and has a weight loss of 500 mg, the wear index will
be 100. Likewise, a material that withstood 500
cycles of abrasion and had a weight loss of 100
