Wheel Loading (Auxiliary Weights); Lowering The Abrading Heads - Taber 5135 Operating Instructions Manual

flange with the S-12 brush is recommended to
prevent the accumulation of particles and other
debris. Any build up of loose debris may
prevent the wheel from being mounted properly.
When not in use, wheels should be stored in
NOTE:
their original containers to prevent damage.

Wheel Loading (Auxiliary Weights)

With no auxiliary weights, each abraser arm
applies a load of 250-grams against the
specimen. In addition to the mass of the
abrading arm itself (250 grams), precision
stainless steel weights are included to provide
standard wheel loads of both 500 and 1000
grams. For simplicity sake, each weight is
marked with the total load that will be exerted on
the wheel. The weights marked 500 grams are
actually 250 grams.
marked 1000 grams are 750 grams.
Counterweights are also available to further
expand the range of wheel loads, and may be
used in conjunction with the standard weights.
Available in 125 gram
counterweights are applied to the mounting stud
found on the back of the abraser arm.
One of three standard wheel loads is normally
specified in the test method – 250 grams, 500
grams, or 1000 grams. This reference is per
arm (not combined), see Figures 6 – 9.
•
When it is necessary to operate at less than
the 250-gram load, counterweights of 125
and 175 gram are available.
•
To operate in the 250-gram range, no
additional weights are used.
•
To operate in the 500-gram range, slide an
auxiliary weight marked 500 grams onto
both the left and right auxiliary weight
mounts (found opposite of the wheel
mounting assembly).
•
To operate at 1000 grams, slide the auxiliary
weights marked 1000 grams onto the
auxiliary weight mounts.
If no wheel loading is specified in the test
method, an appropriate load may be determined
through experimentation.
thumb, a minimum number of test cycles should
be completed before the end point occurs (i.e.
300 cycles). Otherwise, the load may be too
heavy. The section Characteristics of Abrading
Wheels found on page 21 provides additional
information should there be any load restrictions
for the abrading wheel you are using.
Likewise, the weights
or 175 grams,
As a basic rule of
20
Figure 51
The marking of the auxiliary weights indicates
NOTE:
the total of both the weight and the abrading arm.
The load that is specified in most test
NOTE:
methods does not include the mass of the wheel.
To eliminate the mass of the abrading wheels,
NOTE:
place a second pair of wheels on the counter weight
studs located on the rear of the abraser arms.

Lowering the Abrading Heads

Prior to conducting a test or refacing Genuine
Taber wheels, the abrading heads must be
lowered onto the surface of the specimen.
Firmly grip each arm and lower them from their
upright position.
When using the 5155 Abraser, if only one
turntable is utilized, the abrading arms not being
used should be raised to their upright position
and the vacuum nozzle not being used should
be in the down position.
Figure 52
WARNING:
Dropping an abraser arm onto the
specimen table may cause misalignment and
consequent inaccurate test results.
5135 / 5155 Operating Instructions ver 1.1