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In the track
shoe, each pin lug has a 3.308 inch diameter hole for pin
placement. The size and location of these holes are held to
precise tolerances.
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The 3.308" holes are formed directly in the seven pin lugs by
positioning sand cores in the mold.
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With the holes produced
by the sand cores, a simple two-step finish drill takes
the holes to final dimensions and tolerances.
Using
cores in the casting eliminates an expensive, heavy boring operation on the seven
pin lugs. |
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