Siemens SIMOTICS XP Series

Unrestricted 77 A5E43486667A_AB
Terminal box Screws:
Frame Size
Screws
Grade
(mínimum)
Tensile Strength
(minimum)
(PSI)
143/145,
182/184,
213/215,
254/256,
284/286.
1 / 4” - 20NC
5
120,000
324/326,
364/365,
404/405,
444/445, 447 y
449
5 / 16” – 18NC
5
120,000
A specific condition of use is included to indicate that fasteners
should only be replaced by identical ones.
Tightening Torques in motors.
All screws tightening torques for screws in threaded joints of
bearing shields, housing and bearing caps should have the following
torques according to the size of the screw
HEXAGONAL SCREW HEAD GRADE 5
Diameter
(Inches)
Threads per inch
Minimum
(Nm)
Nominal
(Nm)
Maximum
(Nm)
5/32"
32
3.1
3.5
3.8
3/16"
24
4.4
4.9
5.4
1/4"
20
10.7
11.9
14.2
5/16"
18
21.7
24.2
29.2
3/8"
16
38.2
42.5
47.0
7/16"
14
61.0
67.9
75.0
1/2"
13
92.0
103.0
114.0
5/8"
11
184.0
204.0
224.4
3/4"
10
322.0
358.0
393.0
7/8"
9
450.0
490.0
520.0