BRUEL & KJAER 4812 - 3.6. Mounting the Fixture and Test Object

3.6. MOUNTING THE FIXTURE AND TEST OBJECT
3.6.1 . Bolt patterns and mounting screws
In Table 3.2 are shown the bolt patterns and other pertinent data for the three square
table heads in the V Series.
Mounting screws are used to fasten the fixture to the table surface . A steel socket head
screw with a large hexagonal socket and good threads is recommended .
Check each screw before it is used to determine:
a) That the threads are smooth, dean and undamaged,
b) that the socket is dean and undamaged, and
c) that the screw is the right length to engage all of the threads of the insert but not
bottom in the hole.
It may be necessary to use a steel was her under the screw head either to avoid crushing
the fixture or to adjust the length of the screw to avoid bottoming . The mounting screws
should be tightened to the torque shown on the label on the Exciter Head. The use of a
torque wrench is highly recommended.
A
o
B
O O
4811
4812
4813
A mm
in
B
mm
in
Depth
af Hale
Thread Size
mm
in
mm
in
44,7
1,76
35,9
1,41
7,5
0,30
M4
8-32 UNC
66,5
2,62
53,9
2,12
7,5
0,30
M5
10-32 UNF
100,0
3,94
81,0
3,18
15,9
0,63
M6
1/4-20 UNC
Thread
Depth
mm
in
5,6
,216
3,9
,165
4,7
,185
740508
Table 3.2 . Fixturing detal'fs of the three square table Heads
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