DMTA-10026-01EN, Rev. D, January 2015
Chapter 4
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4.5.3 Target Disks
Target disks are used for special applications where the wall thickness needs to be
measured in a thin channel and where a target ball will not move freely in the contour.
The most common application where target disks are used is in automobile tear seam
thickness measurements applications. There are two different target disks: a flat disk
(Olympus P/N: 80TD1 [U8771034]) and a V-edge (Olympus P/N: 80TD2 [U8771035]).
The target disks can be used with a standard probe with STANDARD wear tips or
with the CHISEL wear tip for applications where a thin channel may be on both sides
of the material.
The flat 12.70 mm (0.500 in.) diameter disk (Olympus P/N: 80TD1 [U8771034]): Useful
for applications where a wall thickness needs to be made in a thin channel. The
maximum thickness range with the 80TD1 flat disk is 9.14 mm (0.360 in.) with the
standard wear tip.
The V-edge 6.35 mm (0.250 in.) diameter disk (Olympus P/N: 80TD2 [U8771035]):
Useful for applications where a wall thickness needs to be made in a thin channel and
the 80TD1 disk is too large to move freely in the contours of the material. The
maximum thickness range with the 80TD2 V-edge disk is 6.10 mm (0.240 in.) with the
standard wear tip.
4.5.4 Target Wires
Wire targets are used for special applications where the wall thickness needs to be
made from an outside surface to the inside diameter of a hole. In these applications, a
wire target can be inserted in the hole and the probe will be in contact with the
outside surface. The most common application is for measuring the wall thickness of a
cooling hole in a turbine blade. The 86TW1 (U8771041) is a 1.14 mm (0.045 in.)
diameter wire target and the maximum thickness range is 12.70 mm (0.500 in.) with
the standard wear tip.
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