Rubber Spring:SRX,SRXT0 pages

General Description of Rubber Spring
FOR HIGH DEFLECTION
Bulge of Outer Diameter

Features
(1) Durability: Durability for 100 strokes (at deflection of 35%)
These rubber springs have the ability to resist unti oil, chemical, heat, dust,
corrosion.
(2) Maximum deflection: 35%
(3) Permanent set: 2% or less (at deflection of 35% and 300,000 strokes)
(4) High buckling resistance: Buckling does not occur in parallel load. At the inclination of
3˚, the spring has buckling limit of 35%.
(5) Compact size: Since the deflection is large, the free length is approximately half of the
coil spring.
(6) Maximum load: The load is increased by approx. 10% more than the conventional parts
(SR cushion).

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Application Range
(1) Heat resistance
When the SRX is repeatedly compressed,
it generates heat with hysteresis effect.
Temperature rise reaches a balanced
value and becomes constant around 1,000
strokes. The larger the volume, deflection
rate and strokes per minute (spm) are, the
larger temperature rise is. When 80 x
L160 x inner diameter 22 is used at the
deflection of 35% and at 40 spm, the
balanced temperature rise is approx.
30°C. Continuous heat resistance of the
SRX is 80°C.
(2) Dust resistance
The SRX is very resistant to the
atmosphere with much dust or machined
powder. If such dust or powder is buried
in the pressurizing surface or fixed area,
crack does not grow. Use the SRX as it
is.
(3) Scratch resistance
If the SRX has scratches in the
compression direction, it may not be
broken immediately. It is better to replace
it at an early stage.
(4) Durability
At the deflection of 35%, the durability is
one million strokes. If the SRX is desired
to be used more than 35% (up to 40%),
please contact us.

hD0

hD

At least 5 mm

Deflection rate
=

Pressure Source
Components

When the SRX is compressed, the outer
diameter is bulged. The bulge rate is not
relevant to the spring size. It is proportional to
the deflection rate and the rate is almost
constant of D = 0.81
Bulge rate of
outer diameter: D= hD −hD 0 p100
hD 0
Deflection rate: = S p100
L
Where
D0: Initial outer diameter mm, L: Initial length
mm
D : Maximum outer diameter, S: Deflection mm
Therefore hD = 1 0.81 S phD0
L
The required clearance between the maximum
bulge diameter and the wall is at least 5 mm.

S

SRX is the product with a special blending method of various
rubbers. It is resistant to large deflection (35%) and high load.
Permanent set is limited. It is very cost effective compared to
coil springs or urethane springs.

L

Great improvement of durability

S
p100
L

(5) Oil resistance and chemical resistance
Machine Oil
Grinding Oil
Cutting Oil
Hydraulic Oil
Gear Oil
Gasoline
Turbine Oil
Acetone
Anitone
Ammonia
Ethyl Alcohol
Hydrochloric Acid (Hot)
Hydrochloric Acid (Cold)
Glycerin

u
u
u
u
u
W
y
y
W
u
u
p
W
u

u
W
p
Trichlene
Oxalic Acid
y
Nitric Acid (Diluted) u
Fuming Nitric Acid
p
Tar
W
Toluene
p
Phenol
W
Benzene
p
Paint Thinner
W
Sulfuric Acid (Diluted) y
Sulfuric Acid (Concentrated) p
W
Varnish
Acetic Acid

Diethyl Ether

u No Change y Slightly Changed.
W Considerably Changed. p Not Allowed.

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