Specifications:
The document provides technical specifications for DC-Gearmotors, specifically the 1512 U ... SR series. Key parameters include nominal voltage, terminal resistance, no-load speed, speed constant, back-EMF constant, torque constant, current constant, slope of n-M curve, rotor inductance, and rotor inertia. The housing material is plastic, while the geartrain material is metal. The document also specifies the maximum shaft load, shaft play, and operating temperature range.

Performance and Materials:
The gearmotors feature precious metal commutation and are designed for reversible operation. The document outlines the output torque, reduction ratio, output weight, and efficiency for continuous and intermittent operation. The bearings on the output shaft are made of plastic or brass.

Mechanical Dimensions:
Detailed mechanical dimensions are provided, including diameters and tolerances for various components. The orientation with respect to motor terminals is specified to be within ±10°.

Additional Notes:
The document notes that specifications are subject to change without notice and refers to additional technical information for data and lifetime performance. The output speed is based on a motor input speed of 5000 min-1.