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GERC-B, DIN 6499/ISO 15488-B, concentricity of 5 µm
for hydraulic expansion chucks
Type ER DIN 6499
Meets DIN 6499-A/ISO 15488-A with square drive
ER/ESX sealed in accordance with DIN 6499/ISO 15488-B for internal cooling (can be used at up to 60 bar)