Installation, operation and maintenance instructions
High voltage flameproof motors for explosive atmosphere
AMD Rg 355-400-450-500
Rolling bearings maintenance and checking
Issued by: MOLM
Sheet No.
3AAM101040 E
Rev. B
01.2023
Page 5 of 11
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Table 1. Standard Bearings for motors with rib cooling circuit, IIB/IIC, cast iron frame AMD horizontal assembly.
Size
N° of Poles
D end
N end
355...R…gM(H,S)
2
6316
6316
355...R…gM(H,S)
4 - 6
6322
6316
400...R…gM(H,S)
2
6317
6317
400...R…gM(H,S)
4 - 6
6324
6319
450 .. R…gM(H,S)
2
6317
6317
450 .. R…gM(H,S)
4 - 10
6324
6324
500…R…gM(H,S)
2
6319
6319
500…R…gM(H,S)
4…
6330
6330
Table 2. Standard Bearings for motors with rib cooling circuit
,
IIB/IIC, welded frame AMD horizontal assembly.
Size
N° of Poles
D end
N end
450 .. R…M
2
6317
NU215
450 .. R…M
4 - 10
6324
6321
500 .. R…M
2
6319
NU217
500 .. R…M
4 - 12
6326
6324
Table 3. Standard Bearings for AMD motors with tube cooling circuit and horizontal assembly.
Size
N° of Poles
Side
Frequency
50 Hz
60 Hz
500…T
2
D
6317 – C3
(a)
N
6317 – C3
(a)
500…T
≥
4
D
6324 – C3
N
6319 – C3
560…T
2
D
6319 – C3
(a)
N
6319 – C3
(a)
560…T
≥
4
D
6326 – C3
N
6322 – C3
630…T
2
D
(b)
(b)
N
(b)
(b)
630…T
≥
4
D
6330 – C3
N
6324 – C3
710…T
2
D
(b)
(b)
N
(b)
(b)
710…T
≥
4
D
6034 – C3
NU1034 EC
N
NU322 EC3
900…T
4
D
6044 – M1C3