Selection Confirmation Items with Use of External Shock Absorber
Allowable impact force with use of external shock absorber
q
When the cylinder alone is used.
When the positioning of the stop position is necessary or the absorption capacity of the built-in cushion is not
sufficient, refer to the selection procedure below and consider the installation of an external shock absorber.
Cylinder load factor selection
External shock absorber
Impact force and absorption
capacity confirmation
Example of Recommended Use of the
External Shock Absorber
MY3
16 RB – OEM0.25M
MY3
25 RB – OEM0.5M
MY3
40 RB – OEM1.0MF
MY3
63 RB – OEM1.5M x 1
0.4
0.3
10
5
4
3
2
1
0.2
MY3
16
Collision deceleration (G)
Weight (kg)
20
30
40
50
10
5
4
3
2
1
240 N
m
3
max
m
1
max
m
2
max
50
20
10
5
4
3
2
1
MY3
25
Collision deceleration (G)
20
30
40
50
10
5
4
3
2
1
Weight (kg)
580 N
m
3
max
m
1
max
m
2
max
40
30
20
10
5
4
3
2
1
MY3
40
20
30
40
50
10
5
4
3
2
1
Collision deceleration (G)
Weight (kg)
1500 N
m
3
max
m
1
max
m
2
max
Note) The weight represents the equivalent weight including the thrust
energy.
40
30
20
100
10
5
4
3
2
MY3
63
20
30
40
50
10
5
4
3
2
1
Collision deceleration (G)
Weight (kg)
3700 N
w
When the external guide is used.
External guide load factor selection
External shock absorber
Impact force and absorption
capacity confirmation
Piston Speed with Use of External Shock Absorber
Bore size (mm)
16
25
40
80 to 1500 mm/s
63
m
3
max
m
1
max
m
2
max
MY3A
MY3B
An external shock absorber can be used within the above pis-
ton speed range. In conjunction with the absorption capacity
selection, however, also confirm the conditions which make
the shock absorber collision impact force to stay within the al-
lowable range in the graph.
Use of an external shock absorber with conditions exceeding
the allowable range may damage the cylinder.
To confirm the collision impact force of the shock absorb-
er, first find the impact force or acceleration under the
operating conditions using the selection information or
selection software provided by the manufacturer and
then, refer to the graph.
(The selection should allow a sufficient margin because the
value calculated by the selection software involves an error
with reference to the actual value.)
External Shock Absorber Selection
Model Selection
Series
MY3A/3B
7
MY3A3B.qxd 06.2.17 9:13 AM Page 15
