9904
4-SMD, No Lead
40151738-9904
GEARMOTOR 4 RPM 120VAC CW
The holes in the mounting brackets are spaced at 1 U (1.75 in. or 4.45 cm), so the router can be mounted in any rack that provides holes spaced at that distance.
RATED voltage is the voltage on the nameplate - the "design point" for maximum power throughput and safe thermal operation.
The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.
the variation of output frequency of a crystal oscillator due to external conditions like temperature variation, voltage variation, output load variation, and frequency aging.
the amount of capacitance measured or computed across the crystal terminals on the PCB. Frequency Tolerance. Frequency tolerance refers to the allowable deviation from nominal, in parts per million (PPM), at a specific temperature, usually +25°C.
A phase of operation during the operation and maintenance stages of the life cycle of a facility.
the maximum allowable deviation from the nominal crystal frequency at a specified temperature, usually 25℃. The recommended frequency tolerance of the crystal over the manufacturing process is ±50 ppm.
An encoder is classified into four types: mechanical, optical, magnetic, and electromagnetic induction types.
The “reduction” or gear ratio is calculated by dividing the number of teeth on the large gear by the number of teeth on the small gear.