Socket head – Metalfab Hindon-Invicta L Series User Manual
Page 5
3
SIZE
INTERNAL FASTENERS
(EXCLUDING O/B WEIGHTS)
O/B WEIGHT FASTENERS
* TORQUE (LBS-FT)
SOCKET HEAD
CAP SCREWS
HEX HEAD
BOLTS
SOCKET HEAD CAP
SCREWS
HEX HEAD
BOLTS
M5
6
-
5
-
M6
11
8
8
8
M8
25
20
20
20
M10
50
41
41
41
M12
94
71
71
71
M16
228
178
130
178
M20
-
348
-
348
M24
-
602
361
602
* Values are for factory supplied fasteners.
3.1.1
Vibrator Mounting
It is recommended that the fasteners (bolts, nuts and hardened flat washers) be a minimum
of grade 5 and a maximum of grade 8. It is extremely important to follow the guidelines below for
safe and proper vibrator mounting:
1)
Vibrator must be mounted upon a flat or machined, rigid base. NOTE: If the base is not flat
or is able to flex under load, the vibrator can come loose.
2)
Ensure that no paint or other foreign matter exists on any of the mating surfaces being bolted;
either at the washer seatings or on the vibrator foot or vibrator mounting beams.
3)
For all vibrator models, the mounting bolts must be provided with hardened flat washers
under the bolt heads and under the nuts. Ensure that entire outside diameter of washer seats
within the spot facing of the mounting hole.
4)
The nuts must be pre-tightened until all the mating surfaces are brought into contact. The
nuts must then be tightened using a torque wrench in accordance with torque values as
detailed in Table 2. (Use a criss-cross pattern for torquing sequence).
5)
After approximately 30 minutes of initial vibrator operation, the unit should be switched off
and all mounting bolts checked and re-tightened with a torque wrench to the values stated
in Table 2. After one to two hours of operation, this tightening procedure should again be
repeated. If any loosening of the mounting bolts has occurred during this initial period,
check flatness of mounting plate and vibrator base to ensure a proper "seating" of the two
surfaces.