51
6
5
4
3
2
MAX. HT.
MIN. HT.
30
25
20
15
10
5
100 Psig
80 Psig
40 Psig
20 Psig
120 Psig
Volume
100 Psig
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Do not use Airstroke in
shaded area without
consulting Firestone
60 Psig
RECOMMENDED
AIRMOUNT
DESIGN HEIGHT
5.0 INCHES
Static Data
3944
HEIGHT IN.
121
HEIGHT
17.75 DIA.
24 (3/8-24) BOLTS
EACH RING
28-32 FT. LBS.
TORQUE
16.50 BOLT CIRCLE DIA.
20.3 MAX O.D.
AT 100 PSIG
NOTE: A bead ring part is shown. This part is also avail-
able with rolled plates. See page 11 for explanation.
See page 12 for instructions on how to use chart.
V
OLUME (WITHOUT B
UMPER) CU IN. x 100
FORCE LBS x 1000
Dynamic Characteristics at 5.0 in. Design Height
(Required for Airmount isolator design only)
Volume @ 100 PSIG = 1,154 in
3
Gage
Spring
Pressure
Load
Rate
(PSIG)
(lbs.)
(lbs./ in.)
40
6,450
4,771
161
2.69
60
10,300
6,441
148
2.47
80
14,450
8,312
142
2.37
100
18,450
10,086
139
2.31
Natural
Frequency
CPM
HZ
Description
Assembly Order No.
Ribbed neck aluminum
bead rings,1
7
/
8
bolts, nuts,
washers
WO1-358-7197
Rubber bellows only
WO1-358-5135
Rolled Plate Assembly,
1/2 blind nuts, 3/4 NPT
WO1-358-7272
Assembly weight ...................................................... 16.5 lbs.
Force to collapse to minimum height (@ 0 PSIG)....... 20 lbs.
Style
121
Two
Ply
Bellows
Force Table (Use for Airstroke
®
actuator design)
Volume
Pounds Force
Assembly @ 100
Height
PSIG
@20
@40
@60
@80
@100
(in.)
(in
3
)
PSIG
PSIG
PSIG
PSIG
PSIG
5.0
1,154 2,830 6,450 10,300 14,450 18,450
4.0
935
4,100 8,540 13,070 17,550 22,180
3.0
682
4,760 9,690 14,750 19,600 24,690
