CHAPTER 9 CHARACTERISTICS
9-12
Bending Strength of Cable
9
9.5 Bending Strength of Cable
The bending life of the cable used at a bending radius larger than the recommended bending radius R
of 60 mm is 5,000,000 cycles or over when tested under the following conditions.
<Testing conditions>
(1) Use testing apparatus shown in the figure below to cause the cable to be bent in a traveling
distance L of 300 mm.
(2) Count each reciprocal test cycle. Count the bending frequency until conductors are broken.
The cable life depends largely on the handling method. The bending life is a
reference value for the testing conditions specified above.
Bending
radius
R=60 mm
Fixed end
Moving end
Traveling distance L=300 mm
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