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This fixture offers an accurate means for measuring pinhead and pin shear planarity, as well as pin length, of sheared pins on a substrate.
English (United States)
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Page 1 of 2
Pinhead and Pin Shear Planarity Measurer
This fixture offers an accurate means for measuring pinhead and pin shear
planarity, as well as pin length, of sheared pins on a substrate.
As shown, the fixture comprises a table having a hardened flat steel plate for
a surface. The surface is provided with two dowel locator pins for locating a
hardened spacer bar which has a series of holes which slip fit onto the locator
pins. In the center of the plate is a clearance hole which receives a dial indicator
To measure the sheared pins for planarity, the spacer bar is positioned on
the locator pins so that the substrate is positioned to measure the outside rows of
pins. The substrate is moved by finger pressure along the edge of the spacer
bar to the first sheared pin, where the dial indicator is set to 0 as a reference
point. The substrate is then slid forward over the remaining pins to complete
measuring the outside row of pins. The spacer bar is relocated and the process
repeated until all of the pins have been measured. To measure the pinhead
planarity, the substrate is turned upside down and the process repeated.
A dial indicator is mounted onto the side of the fixture which has an indicator
tip into which the pins are inserted to measure the pin length.
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