BELLOWS 8" x 3
ØMax
Ø184
VOLUME V (dm3) at 6 bar
LOAD (daN)
4 M10
26.3
7 .0
2 400
8 bar
SPRINGRIDE 8x3
2 200
H
V
6 .0
2 000
26.3
1 800
6 bar
4 M10
Øe
5 .0
Ø155.5
1 600
Rp 1/2
1 400
4 bar
4 .0
1 200
ASSEMBLED WITH 8 NUTS Hu10 AND 8 WASHERS GROWER WZ10.
FASTENING TORQUE 25 Nm
Heights (mm)
(H)
Maximum Minimum
Design
Stroke
(mm)
230
250
1 000
3 .0
350
100
Diameters (mm)
Ø MAX
Overall
Weight
(kg)
215
240
4.4
800
2 bar
600
2 .0
Rubber
Bellow
Features
400
Part
Numbers
200
Standard
-Rubber Only
SP2859
1 .0
0
360
-40 to 70°C
-Assembled Bellows
320
280
240
200
160
120
80
SP2863
HEIGHT (mm)
Butyl
-25 to 90°C
-Rubber Only
SP2876
-Assembled Bellows
SP2888
-Rubber Only
SP2877
- Indicative value of force required to reach minimum
height at atmospheric pressure :
35 daN
- Maximum pressure :
Epichlore
-20 to 115°C
-Assembled Bellows
SP2889
8 bar
- The datas presented on this document are liable to
evolution and don't constitute a commitment from DUNLOP AIRSPRINGS (see page 5-7).
50
BELLOWS 8" x 3
FOR USE AS A PNEUMATIC ACTUATOR
ANGULAR CAPABILITY
OUT OF ALIGNMENT
CHARACTERISTICS IN STATIC CONDITION
Maximum
(α)
LOAD (daN)
HEIGHT
(mm)
Pressure
2 bar
Pressure
4 bar
Pressure
6 bar
Pressure
8 bar
100
595
1170
1740
2320
150
500
995
1485
1980
200
405
820
1230
1645
230
350
715
1075
1445
250
310
640
975
1310
300
210
465
720
980
350
110
285
465
650
For H between
Maximum
For H between
H mini
H maxi
(A)
H mini
H maxi
(mm)
(mm)
(mm)
(mm)
(mm)
5°
150
325
5
125
345
10°
180
305
10
130
340
15°
280
210
15
135
330
20
140
325
- Airsprings must not be pressurised unless they are restricted by an outside frame or by a suitable load.
- Strokes must be limited by the direct use of bump stops or external stops.
- When stacking airsprings, special cares must be taken to ensure the airsprings are guided and fixed.
- An Airspring is a single acting air actuator and must not be used below atmospheric pressure.
- Please check the over-pressure in case of quick compression.
- The datas presented on this document are liable to evolution and don't constitute a commitment from
DUNLOP AIRSPRINGS (see page 5-7).
FOR USE AS AN ISOLATOR
- Isolation rate is given by the formula :
DYNAMIC CHARACTERISTICS AT
Pressure Pressure
2 bar
4 bar
*
H= 280 mm *
Pressure
6 bar
LOAD
( daN )
250
535
820
VOLUME
( dm3 )
4.77
5.05
5.32
STIFFNESS
( daN/cm )
33.4
60.2
85.1
NATURAL
FREQUENCY ( Hz )
1.82
1.67
1.60
ISOLATION RATE
at 10 Hz
96.6%
97.1%
97.4%
Pressure
8 bar
I = 1−
1
2
 fe 
  −1
 fn 
LOAD
fe = Exciting frequency (Hz)
fn = Airspring natural frequency (Hz)
Warning : 3 convolutions bellows are laterally
instable, when used as isolators,
they need special guides.
Recommanded height for better isolation.
51