Area fire crews responded to a fire in Norwell at 22 Longwater Drive, the address of the Zildjian cymbal factory.
Reports of heavy smoke coming from the building came in just before 2 p.m. Thursday; the fire quickly went to a second alarm.
Engines from Hingham, Rockland and Scituate were called to the scene for mutual aid, while Hanover and Hull fire departments were requested to provide station coverage in Norwell.
By around 2:15 p.m. officials were reporting that the fire was knocked down, but extensive overhaul would be required.
Fire officials say they are not sure what caused the fire, but suspect that it may have started from a malfunction somewhere in the manufacturing process.