Mil Spec Inc. · Electronic Components
MR1057
Motor, Alternating Current
Part NumberMR1057
ManufacturerMil Spec Inc.
AvailabilityAvailable to order — request a quote
Specifications
NSN6105-01-357-9749 (NSN)
Federal Item NameMOTOR,ALTERNATING CURRENT
Federal Supply Class6105 — Motors, Electrical
Duty CycleCONTINUOUS
Keyway Width0.250 INCHES NOMINAL SINGLE END
Shaft Diameter1.1245 INCHES MINIMUM AND 1.1250 INCHES MAXIMUM SINGLE END
Winding TypeINDUCTION-SQUIRREL CAGE
Shaft End StyleFLAT KEYWAY SINGLE END
Mounting Facility Type And Quantit4 UNTHREADED HOLE(S)
Current Rating In Amps2.500 SINGLE INPUT
Enclosure FeatureDRIPPROOF-15 DEG
Keyway Depth0.250 INCHES NOMINAL SINGLE END
Nominal Center To Center Distance4.500 INCHES
Frame Size Designation182T
RH Electronics, Inc. — independent stocking distributor since 1982.
Every shipment inspected on receipt · ISO 9001:2015 · ANSI/ESD S20.20 · ERAI member since 1998 · GIDEP participant
Every shipment inspected on receipt · ISO 9001:2015 · ANSI/ESD S20.20 · ERAI member since 1998 · GIDEP participant
Frequently asked
Is MR1057 available?
We can source MR1057 even if it isn't in our active stock list. As an independent distributor we reach inventory outside the franchise channel — including hard-to-find and obsolete parts. Send us a quote request.
Is MR1057 by Mil Spec Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If MR1057 has been discontinued, we can often source remaining stock or qualified alternates. Contact us with your quantity and target date.
How does RH Electronics verify parts like MR1057?
Every incoming shipment is inspected under our ISO 9001:2015 quality system — documentation, markings, and construction checked against known-good references. For deeper analysis, we direct work through accredited independent labs. We've been an ERAI member since 1998 and a GIDEP participant.
Can you find a cross-reference or alternate for MR1057?
Yes. Our team reads part numbers the way they were designed — decoding family, speed, temperature grade, package, and reliability level — to identify acceptable alternates when the exact part isn't available. Submit a quote request and we'll advise.