Brochure

Mounting
Load
Caution
1. Tightening torque and mounting thread
When threading on the mounting frame in order to mount a
shock absorber directly, refer to the prepared hole dimensions
below. Observe the below tightening torque of a nut for shock
absorber.
If the tightening torque exceeds the value below, the shock
absorber could be damaged.
When a shock absorber is mounted on a cylinder, follow the
torque values listed on each cylinder.
Allowable eccentric angle θ
1 ≤ 3°
2. Deviation of impact
Mount the shock absorber so that the point of contact of an
impacting material must be within the allowable eccentric
angle range. If the eccentric angle is exceed 3°, an excessive
load could be placed on the bearings, resulting in oil leak in a
short time.
Note) Load on mounting frame is at room temperature (20 to 25°C).
For with cap θ1 ≤ 1°
Warning
1. Before performing installation, removal, or stroke
adjustment, make sure to cut the power supply to
the equipment and verify that the equipment has
stopped.
2. Installation of protective cover
We recommend the protective cover should be installed for
fear that workers might be getting close during the operation.
3. Strength of mounting frame
The mounting frame needs to have sufficient strength. When
deciding the strength of the mounting frame, consider the load
applied to the mounting frame at the upper limit of operating
conditions shown in the table below, and allow a sufficient
safety factor.
RJ0604
RJ0805
RJ0806
RJ1006
RJ1007
RJ1410
RJ1412
RJ2015
RJ2725
Model
Load on mounting frame
450 N
380 N
630 N
900 N
1600 N
1700 N
2000 N
6000 N
8500 N
Thread dimensions [mm]
Nut tightening torque [N·m]
Thread prepared hole dia. [mm]
M6 x 0.75
0.85
ø5.3
+0.1
0
+0.1
0
+0.1
0
+0.1
0
+0.1
0
+0.1
0
Model
RJ0604
M8 x 1.0
1.67
ø7.1
RJ08
M10 x 1.0
3.14
ø9.1
RJ10
M14 x 1.5
10.8
ø12.7 ø18.7 ø25.7
RJ14
M20 x 1.5
23.5
RJ2015
M27 x 1.5
62.8
RJ2725
4. Do not scratch the sliding portion of the piston rod
or the outside threads of the outer tube.
Failure to observe this precaution could scratch or gouge the
sliding potion of the piston rod, or damage the seals, resulting
in oil leak or malfunction. Furthermore, damage to outside
threaded portion of the outer tube could prevent the shock
absorber from being mounted onto the frame, or result in a
malfunction by internal component parts deformation.
5. Never turn the screw on the bottom of the body.
This is not an adjusting screw. Otherwise, oil leak could occur.
3. Rotating angle
If swing impacts are involved, the installation must be
designed so that the direction in which a load is applied should
be perpendicular to the shock absorber’s axial center.
The rotating eccentric angle to the stroke end must be θ
2 ≤ 3°.
Allowable rotating eccentric angle θ
2 ≤ 3°
Caution
Installation Requirement for Swing Impacts
[mm]
Model
S
(Stroke)
4
5
6
6
7
10
12
15
25
76
96
115
115
134
191
229
287
478
–
258
277
306
325
449
487
611
916
3°
θ2
(Allowable
rotating angle)
With capBasic type
R (Min. installation radius)
RJ0604
RJ0805
RJ0806
RJ1006
RJ1007
RJ1410
RJ1412
RJ2015
RJ2725
Do not rotate
bottom set screw.
Piston rod
Do not damage.
Series RJ
Specific Product Precautions 2
Be sure to read this before handling. Refer to the back cover for Safety Instructions,
“Handling Precautions for SMC Products” (M-E03-3) for Common Precautions.
11