Unit installation, Nord gear corporation, Nord gear limited – Viking Pump NORD TSM For NORDBLOC.1 Reducers User Manual
Page 7: Retain for future use
5. Concrete foundation
If a concrete foundation is used, allow the concrete to set
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concrete, to adequately distribute the load stress onto the
concrete foundation.
Figure 1: Concrete Foundation
6. Bolt connections for footed & flange mounted units
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torque reaction capacity whatever the mounting arrange-
ment. Tightening torque for gear reducer mounting bolts,
and recommended fastener grades, are provided in Table 2.
Table 2A: Tightening Torque for Inch Reducer Mounting Bolts
Thread
Size
Tightening Torque
Grade SAE 5 /
ASTM A449
Grade SAE 8
(in)
(lb-in)
(lb-ft)
(Nm)
(lb-in)
(lb-ft)
(Nm)
1/4-20
85
7.1
9.6
120
10.0
13.6
5/16-18
190
16
21
267
22
30
3/8-16
330
28
37
470
39
53
1/2-13
825
69
93
1,170
98
132
5/8-11
1,660
138
188
2,340
195
264
3/4-10
2,960
247
334
4,180
348
472
7/8-9
4,750
396
537
6,700
558
757
1-8
7,100
592
802
10,000
833
1,130
1 1/8-7
-
-
-
14,800
1,233
1,672
1 1/4-7
-
-
-
20,600
1,717
2,327
1 3/8-6
-
-
-
27,200
2,267
3,073
1 1/2-6
-
-
-
35,800
2,983
4,045
1 3/4-5
-
-
-
53,500
4,458
6,045
t $BMDVMBUFE UJHIUFOJOH UPSRVFT BSF CBTFE B DPOWFOUJPOBM
60°, clean and dry (un-lubricated) thread, with thread-
friction and head-friction equal to 0.15.
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Table 2B: Tightening Torque for Metric Reducer Mounting Bolts
Above
Tightening Torque
ISO Grade 8.8
ISO Grade 10.9
(mm)
(lb-in)
(lb-ft)
(Nm)
(lb-in)
(lb-ft)
(Nm)
.
28
2.4
3.2
42
3.5
4.7
.
57
4.7
6.4
82
6.9
9.3
.
97
8
11
142
12
16
.
239
20
27
345
29
39
.
469
39
53
690
58
78
.
814
68
92
1,195
100
135
.
1,283
107
145
1,903
159
215
.
2,036
170
230
2,965
247
335
.
2,036
170
230
2,965
247
335
.
4,071
339
460
5,841
487
660
.
5,576
465
630
7,966
664
900
.
6,992
583
790
10,178
848
1,150
.
10,178
848
1,150
14,604
1,217
1,650
.
14,161
1,180
1,600
19,914
1,660
2,250
.
24,605
2,050
2,780
34,606
2,884
3,910
.
39,563
3,297
4,470
55,671
4,639
6,290
t $BMDVMBUFEUJHIUFOJOHUPSRVFTBSFCBTFEPOBDPOWFOUJPOBM
60°, clean and dry (un-lubricated) thread, with thread-
friction and head-friction equal to 0.15.
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minimum ISO Grade 8.8 bolt.
7. Mounting the prime mover
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to the gearbox, it is important to properly secure and
align the gear drive with respect to the driven machine
before attempting to align the prime mover or motor.
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place, align the prime mover with respect to the reducer
input shaft.
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and secure in place with the proper mounting bolts. Dowel
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and ensure proper realignment if removed for service.
IMPORTANT NOTE
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the prime mover and the reducer, check alignment
per the coupling manufacturers recommendations. If
the coupling is misaligned, the reducer alignment or
shimming is incorrect. Re-align the gear reducer and
re-check the high-speed coupling alignment before re-
aligning the motor.
DRIVESYSTEMS
UNIT INSTALLATION
RETAIN FOR FUTURE USE
U10060 - 2 of 2
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Grouted Structural
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p
Concrete Foundation
www.nord.com/docs
06.09.09
NORD Gear Corporation
Toll Free in the United States: 888.314.6673
NORD Gear Limited
Toll Free in Canada: 800.668.4378