The ASR2000 direct-drive spindle from Aerotech Inc. features a high-speed brushless servomotor and is capable of accelerating to 6000 rpm in <1 s. The device is suitable for disc-drive testing, imaging applications and precision wafer inspection. The spindle has matched angular contact bearings and is balanced to ISO 1940 G 1.0 tolerances. The balancing screws are externally accessible and can be adjusted with final payload to a tolerance of G 0.4 to G 1.0. The company says that the ASR2000 has an efficient electromagnetic design that provides high performance and low operating temperatures. Custom configurations are available.