Some common factors for drum quality assurance:
Appearance
Quantity check
Measurement(weight & size)
Basic function test
Coating thickness check
Lagging check
Torque verification of screws of the locks
3M tape test for Logo
Some common factors for drum quality assurance:
Appearance
Quantity check
Measurement(weight & size)
Basic function test
Coating thickness check
Lagging check
Torque verification of screws of the locks
3M tape test for Logo