Ametek Permanent-Magnet 40-volt DC Servo Motor / DC Electric Wind Turbine

• Near-new, run only 70 hours for quality-control purposes. Not salvaged from a mainframe tape drive.
• Built for long life: 21-bar commutator, 4 pure carbon brushes, sealed 1.625″ radial ball bearings.
• Welded steel motor case (1/6-inch thick). Cold-rolled carbon steel shaft, black oxide coating.
• Voltage constant 32.5 volts/krpm 218 oz-in peak 113 oz-in sustained torque. 60 volt max continuous.
• Use it as a wind-turbine DC electric generator or as a low-rpm high-torque servo motor.

This Ametek 40V PMDC motor is near-new and not scavenged from an open-reel mainframe tape drive. Never used or installed, merely run 70-hours to produce data for a statistical quality-control database. . . . . It was originally designed to precisely position magnetic tape at slow or fast speed, so it has a 21-bar commutator, minimal starting voltage, and a linear torque curve. Magnetically shielded, RFI suppressed, and UL recognized. This “7980” series Ametek motor has four carbon brushes instead of the usual two. This results in lower resistance at the commutator, generates less waste heat, and prolongs brush life to 15,000 hours. . . . . Use it as a DC generator in a bicycle-style emergency power generator, a water-wheel electric generato