Plastigauge

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Plastigauge , pronunciation: Plasti [plasti] -gauge [geidʒ] (English) and [ˈgoʒ] (French). Likewise also Plastigage spoken.

Plastigauge-gauges are special Gauges , here special strain gauges ( English Strain gauge ) consisting of thin rods (filaments) of a special wax. If these are flattened (squeezed), the current thickness results from the new width with an associated comparison gauge. This measuring method is used for repairs where a shaft has to be fitted in a split bearing.

It is about determining the optimal spacer plates (shims) that are necessary between the bearing shells. To do this, everything is assembled with the presumably correct spacer plates and with a (spiral) inserted measuring thread. After dismantling, the squish width confirms the desired or prescribed bearing clearance. Otherwise new spacer plates must be fitted.

This measuring method is preferred in the Anglo-American area. Therefore, the display on the comparison scale is often given in inches.

This procedure is widespread in the repair of internal combustion engines. This is particularly about the correct bearing play of the crankshaft .