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UNIT INSTALLATION
RETAIN FOR FUTURE USE
DRIVESYSTEMS
5. Concrete foundation
Table 2B: Tightening Torque for Metric Reducer Mounting Bolts
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
! Grouted Structural
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# Concrete Foundation
6. Bolt connections for footed & flange mounted units
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torque reaction capacity whatever the mounting arrangement. 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
5/16-18
3/8-16
1/2-13
5/8-11
3/4-10
7/8-9
1-8
1 1/8-7
1 1/4-7
1 3/8-6
1 1/2-6
1 3/4-5
85
190
330
825
1,660
2,960
4,750
7,100
-
7.1
16
28
69
138
247
396
592
9.6
21
37
93
188
334
537
802
-
-
120
267
470
1,170
2,340
4,180
6,700
10,000
14,800
20,600
27,200
35,800
53,500
10.0
22
39
98
195
348
558
833
1,233
1,717
2,267
2,983
4,458
13.6
30
53
132
264
472
757
1,130
1,672
2,327
3,073
4,045
6,045
-
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60°, clean and dry (un-lubricated) thread, with threadfriction and head-friction equal to 0.15.
Above
Tightening Torque
ISO Grade 8.8
ISO Grade 10.9
(mm)
(lb-in)
(lb-ft)
(Nm)
(lb-in)
(lb-ft)
(Nm)
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
28
57
97
239
469
814
1,283
2,036
2,036
4,071
5,576
6,992
10,178
14,161
24,605
39,563
2.4
4.7
8
20
39
68
107
170
170
339
465
583
848
1,180
2,050
3,297
3.2
6.4
11
27
53
92
145
230
230
460
630
790
1,150
1,600
2,780
4,470
42
82
142
345
690
1,195
1,903
2,965
2,965
5,841
7,966
10,178
14,604
19,914
34,606
55,671
3.5
6.9
12
29
58
100
159
247
247
487
664
848
1,217
1,660
2,884
4,639
4.7
9.3
16
39
78
135
215
335
335
660
900
1,150
1,650
2,250
3,910
6,290
t $BMDVMBUFEUJHIUFOJOHUPSRVFTBSFCBTFEPOBDPOWFOUJPOBM
60°, clean and dry (un-lubricated) thread, with threadfriction 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 realigning the motor.
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(SBEF 4"& "45. "
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NORD Gear Limited
Toll Free in Canada: 800.668.4378
06.09.09
NORD Gear Corporation
Toll Free in the United States: 888.314.6673
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