MIL-PRF-24751A(SH)
1.2.5 Ambient temperature.
Maximum ambient temperature
PIN Code
65 °C
6
1.2.6 Quiet bearing.
Quiet bearing
PIN Code
Quiet bearing is applied
QB
1.2.7 Nonmagnetic.
Nonmagnetic
PIN Code
Nonmagnetic is applied
NM
1.3 Part or identifying number (PIN). PINs to be used for standard gas turbine enclosure cooling fan-motor
units acquired to this specification are created as follows (see 1.2.1 through 1.2.7):
24751
-
X
X
X
X
X
XX
XX
M
Ambient
Quiet
Voltage
Prefix for
Specification
Nonmagnetic
Enclosure
Size
Current
temp.
bearing
and phase
Military
number
Specification
For example M24751-TA3A4W6QBNM represents a nominal 17,000 cubic feet per minute (ft3/min) vaneaxial
fan driven by a 440 volt (V), 60 hertz (Hz), 3-phase, alternating current (ac), spraytight, 65 °C ambient temperature,
Navy service A motor, with quiet bearings, and of non-magnetic construction.
2. APPLICABLE DOCUMENTS
2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This
section does not include documents cited in other sections of this specification or recommended for additional
information or as examples. While every effort has been made to ensure the completeness of this list, document
users are cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 of this
specification, whether or not they are listed.
2.2 Government documents.
2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a
part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are
those cited in the solicitation or contract.
DEPARTMENT OF DEFENSE SPECIFICATIONS
MIL-S-901
-
Shock Tests, HI (High Impact); Shipboard Machinery, Equipment, and
Systems Requirement For
MIL-B-17931
-
Bearings, Ball, Annular, For Quiet Operation
2
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