Description
ER-40 7/16″ Coolant Spring Collet (3900-5781) ~ Designed for use with cylindrical shank tools, not flats. ~ Cutting tool should be inserted the full length of the collet. If these conditions are not met, coolant leakage may result. ~ Runout is <= .0005". ~ Meets DIN 6499B. ~ Collapse Range is .433 to .472". ~ D1 Major diameter is 1.620". ~ Overall length is 1.810". Designed for use with cylindrical shank tools, not flats. Cutting tool should be inserted the full length of the collet. If these conditions are not met, coolant leakage may result. Runout is <= .0005". Meets DIN 6499B. Collapse Range is .433 to .472".
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