MIL-DTL-3124E(SH)
TABLE I. Material requirements.
Item
Item
Limitation
Material
Remarks
no.
1
Ball bearing cap cartridge
All sizes
Steel
ASTM A47/A47M,
Grade 35018
Malleable iron
2
Bearing shells
Where used
Steel or bronze
3
Covers, hand hole or access
All sizes
Steel
ASTM A47/A47M,
Grade 35018,
Malleable iron
ASTM B26/B26M, or
Aluminum
ASTM B209
Steel 1/
4
End brackets
MIL-C-24707/5,
ASTM A395/A395M, and
Nodular iron
ASTM A439
5
Eyebolts, lifting
Where used
Steel
ASTM A572/572M
6
Fans
All sizes
Steel
Steel 1/
7
Flanges (stator)
Steel 1/
8
Frames
9
Grease cups and pipes
Where used
Steel
10
Oil seals
a. Sleeve bearings
All sizes
Metal (copper,
aluminum, aluminum
bronze or brass)
b. Ball bearings
All sizes
Steel or malleable
iron
11
Punchings, armature and
All sizes
Steel
Nonaging, low hysteresis
field
12
Resistance temperature
(1) Sleeve bearings
MIL-T-24388
sensing, elements (RTEs)
300 kW and larger
(2) Stator windings
and cooling at 500 kW
and larger
13
Roller bearings
Where used
See 3.3.8.2.1
Shaft 2/
14
All sizes
Steel
As approved by NAVSEA.
15
Sleeve bearings
Where used
Babbitt
ASTM B23
16
Spacers and coil separators
All sizes
Plastic
MIL-I-24768, Type GSG,
GMG, or GME.
ASTM D5948,
mineral-filled
5
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