Mounting bolt tightening torques
Hexagon nut tightening torques
Tightening torques of the mounting bolts
Mounting a workpiece
Mounting the F-type support
Mounting the shock absorber, and stroke adjustment
Model
Tightening torque
N·m [ft·lbf]
ORV16
ORV20
ORV25
ORV32
ORV40
ORV50
2.0 [1.5]
2.0 [1.5]
4.0 [3.0]
7.0 [5.2]
7.0 [5.2]
15.0 [11.1]
M4
×
0.7
M4
×
0.7
M5
×
0.8
M6
×
1
M6
×
1
M8
×
1.25
Mounting bolt
Remark: Tighten the table mounting bolt in accordance with the above values.
Piston yoke
Table
Shock absorber holder
Shock absorber
Hexagon nut
Table mounting bolt
Stopper
1. There are no particular restrictions on mounting position so
long as the end surface of the shock absorber holder does
not protrude beyond the cylinder end surface. (Can also be
used at an intermediate position.)
2. Mount so that the shock absorber and the stopper on the
table are completely in contact with the entire surface.
3. Use the shock absorber within the range of the shock
absorber absorption capacity (the range of its capacity graph).
4. Maximum impact speed of the shock absorber is 800mm/s
[31.5in./sec.]. Note that this is not the same as the average
speed. The speed at the time of impact should not exceed
800mm/s [31.5in./sec.].
5. Do not use the shock absorber in a place subject to dripping
water or oil, or large amounts of dust. If using it in these
places, install a cover, etc., so that the drops do not drip on it
directly and it is not covered in dust. Otherwise it could lead to
improper operation and may decrease the absorption energy.
6. Do not loosen the setscrew on the center of the shock
absorber’s back end surface. The oil inside will leak out
which fail the function of the shock absorber.
7. Do not install other shock absorbers in this product without
permission. Because product characteristics vary between
shock absorbers, if other shock absorbers are used, damage
to the cylinder etc., may occur.
8. Use the supplied table mounting bolts to secure the table to
the piston yoke.
Model
Tightening torque
N·m [ft·lbf]
ORV16
ORV20
ORV25
ORV32
ORV40
ORV50
8.0 [5.9]
8.0 [5.9]
10.0 [7.4]
24.0 [17.7]
30.0 [22.1]
78.0 [57.5]
13 [0.512]
14 [0.551]
17 [0.669]
21 [0.827]
24 [0.945]
27 [1.063]
Width across flats
mm [in.]
q
Loosen the hexagon nut holding the shock absorber.
w
Use a flat blade screwdriver to rotate the shock absorber
and adjust its position.
e
When the desired position has been attained, tighten
the hexagon nut to secure it in place.
1. When using the piston yoke to mount a workpiece, fasten
within the tightening torques shown in the table below.
2. Pay attention to the screw length of the mounting bolt.
Screwing a bolt deeper than the tapped hole depth could
result in its bumping against the shim and band guide, caus-
ing defective operation.
For the F-type support, use mounting holes in four places to
secure it in place with bolts.
Model
Tightening torque
N·m [ft·lbf]
ORV16
ORV20
ORV25
ORV32
ORV40
ORV50
2.0 [1.5]
2.0 [1.5]
4.0 [3.0]
7.0 [5.2]
7.0 [5.2]
15.0 [11.1]
M4
×
0.7
M4
×
0.7
M5
×
0.8
M6
×
1
M6
×
1
M8
×
1.25
Mounting bolt
■
Mounting
■
Shock absorber position adjustment
Mounting bolt
Piston yoke
Shim and band guide
Cylinder barrel
4 mounting holes
M-type mounts
Mount bumper
Piston bumper
Be sure to remove the mount bumper when using M-type
mounts. If the mount bumper is left in place, the piston bumper
will not function, which could drastically shorten the cylinder’s
operating life.
The cylinder is equipped with two types of bumpers, a mount
bumper and a piston bumper. Piston stopping shocks are
designed to be absorbed by the piston bumpers, while the mount
bumpers are auxiliary. The mount bumpers can be removed when
using M-type mounts, etc.
The bumpers
1054̲1067ORVｼﾘｰｽﾞ̲ENG 07.9.10 1:58 AM ページ1058
