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Polysorb Disk springs made of plastics

disc springs are annulus discs stressable in the axial direction, which are turned over in the shape of a disc in the axial direction. disc springs provide a more favorable space usage than other spring types. They are particularly suitable for designs that demand a small spring deflection.

When should I use Polysorb disc springs?

When an application requires special disc spring characteristic curves which are flat and possible in metal only at a considerable expense (slotted designs)

For compensation of axial clearances and manufacturing tolerances

For vibration damping

For noise damping

When a non-magnetic material is required

For electrical and thermal insulation

–

When not to use polysorb disk springs?

When constant spring forces are necessary over a wide temperature range

When high spring forces are required

The spring deflection of the disk spring is relatively small. Therefore a number of disk springs are combined in practice. Alternatively layered disk springs enhance the spring deflection in proportion to the number, whereby the overall spring force is as large as the force of the individual disk spring. To increase the force, the disk springs can be layered in parallel as a spring packet.

Chemical resistance

Polysorb disk springs are resistant to many chemicals. iglidur® A500 has a higher resistance than iglidur® J.

Medium	Resistance
	iglidur® J	iglidur® A500
Alcohols	+	+
Hydrocarbons	+	+
Fats, oils without additives	+	+
Fuels	+	+
Diluted acids	0 to -	+
Strong acids	-	+
Diluted bases	+	+
Strong bases	+ to 0	+

Humidity absorption

The low humidity absorption allows them to be used in wet or humid environment.
Polysorb® disk springs absorb humidity. Thereby their mechanical properties alter. In the worst application that can be thought of - extremely long application in water - Polysorb® disk springs still exhibit high spring force.

iglidur®	Standard environment	saturated in water
J	18	15
A500	24	23

Increased operating temperature

Increased temperatures lead to the decline of stiffening in polymers. Polysorb® disk springs exhibit a maximum spring force of 8 N even at the maximum permitted temperature of 80° C. See figure for relationship of spring force to ambient temperature.

Polysorb Disk springs long-term tests

X = downward deflection [%]
Y= spring force [N]

A = JTEM-10
B = A500TEM-10

Figure 35.1: Spring force depending on the percentage of deflection measured in installation size 10

Influence of the ambient temperature on the disk springs

X= Ambient temperature [°C]
Y= Maximum spring force [N]

Figure 35.2: Influence of the ambient temperature on the spring force, measured on JTEM-10

Dimensions according to DIN 2093

Polysorb Disk springs delivery program

De [mm]:
Di [mm]:

Part No.*	Standard values: Spring lengths and forces
	D_e	D₁	t	h₀	F_1,0	M
	[mm]	[mm]	[mm]	[mm]	[N]	[g]
JTEM-05	10	5,2	0,5	0,25	5	0,04	2,99 EUR
JTEM-06	12,5	6,2	0,7	0,3	10	0,11	3,15 EUR
JTEM-08	16	8,2	0,9	0,35	16	0,2	3,17 EUR
JTEM-10	20	10,2	1,1	0,45	24	0,33	3,24 EUR
JTEM-12	25	12,2	1,5	0,55	45	0,85	3,67 EUR
JTEM-16	31,5	16,3	1,75	0,7	65	1,44	4,12 EUR
JTEM-20	40	20,4	2,25	0,9	130	3,1	4,35 EUR
A500TEM-05	10	5,2	0,5	0,25	8	0,04	4,94 EUR
A500TEM-06	12,5	6,2	0,7	0,3	15	0,11	5,20 EUR
A500TEM-08	16	8,2	0,9	0,35	24	0,2	6,08 EUR
A500TEM-10	20	10,2	1,1	0,45	35	0,33	6,14 EUR
A500TEM-12	25	12,2	1,5	0,55	70	0,85	7,92 EUR
A500TEM-16	31,5	16,3	1,75	0,7	85	1,44	11,15 EUR
A500TEM-20	40	20,4	2,25	0,9	150	3,1	15,34 EUR

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The standard values for the spring lengths and forces are rounded mean values.
* Material:
iglidur® J: JTEM, Standard
iglidur® A500: A500TEM, high temperature and/or chemical resistance

Formula symbol, description and units:

F	= Force
S	= Spring travel
D_e	= Outer diameter [mm]
D₁	= Inner diameter [mm]
t	= Thickness of the single disc [mm]
h₀	= Maximum spring displacement [mm]
F_1,0	= Spring force with 100% displacement [N]
M	= Weight of a single disc [g]