Koso REXA Electraulic Xpac, Installation And Operation Manual

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Xpac
Installation Manual -- Version 5.1 (5/08)
18
REXA
Electraulic Actuators & Drives
diameter and recommended bolt torques. Standard bolting or threaded
studs are acceptable, but material strength must be an SAE Grade 3
or better. Hardened load washers and lock washers must be used.
Figure 4.C Drive Base Bolting
RECOMMENDED
Model Hole Min. Bolt Bolt Torque
Diameter Diameter Minimum Maximum
D600/1200 .56" ½" 20 lb·ft 30 lb·ft
D2500/5000 .56" ½" 20 lb·ft 30 lb·ft
D10000/20000 .81" ¾" 200 lb·ft 250 lb·ft
D50000/100000 1.25" 1
1
/
8
" 700 lb·ft 800 lb·ft
Note: Bolting to be SAE Grade 3 or better.
4.3.2 Drive Arm
Connection to the driven device (linkage) is by means of the drive
arm. It is usually supplied manufactured to the user's specified length,
pin diameter and end undercut as shown in figure 4.D. The length
of the arm is determined by the relationship between the required
torque and rotation of the damper and the rated torque and rotation
of the drive.
Figure 4.D Drive Arm
The connecting link and other linkage is selected to withstand the
maximum load imposed by the drive. This will vary depending upon
the effective length of the arm. The following equation should be
used to determine the minimum safe working load of the connecting
linkage:
The safe working load assumes a
maximum rotation from perpendicu-
lar (drive arm to connecting link) of
±60°. Operation at a greater angle
will impose extreme loads and is not
recommended.