| 摘要 |
A grindstone clearance correcting device for spring grinding machine comprises a drive unit for driving a pair of grindstones for grinding both ends of a coil spring in a direction perpendicular to flat surface of a work table, and an extra length spring detecting unit for detecting an extra length spring whose grinding allowance is not removed due to the abrasion of the pair of grindstones, whereby the pair of grindstones are shifted by the driving unit in a predetermined quantity in a direction where the grindstones approach mutually.
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