Polysorb - disc springs
Spring washers are discs that can be axially loaded and are concave in the axial direction. Polysorb disc springs require less space than other spring types. They are especially suitable for designs that do not require a high spring length.
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When to use Polysorb disc springs
Compensation for axial clearances and manufacturing tolerances
Vibration dampening
Noise dampening
Anti-magnetic
Electrical and thermal insulation
When no corrosion problems should arise
No lubrication necessary
Lightweight
Low profile dimensions
Maintenance-free
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When not to use them
When constant spring forces are necessary over wide temperature ranges
When high spring forces are required
The spring length of the disc spring is relatively small. In practice, a number of disc springs are combined. Disc springs that are alternately stacked increase the spring length proportionally to the amount of springs. The total spring force is as large as the force of one single disc spring. In order to increase the force, the disc springs can be parallel stacked to form a spring packet.
Chemical resistance
Polysorb disc springs are acid-resistant against diluted lyes and very weak acids, as well as against fuels and all types of lubricants. The small moisture absorption permits the use in wet or moist environments.| Medium | Resistance |
| Alcohol | Resistant |
| Chlorinated hydrocarbon | Resistant |
| Ester | Not resistant |
| Fats, oils | Resistant |
| Ketone | Conditionally resistant |
| Fuels | Resistant |
| Weak acids | Conditionally resistant |
| Strong acids | Not resistant |
| Weak alkalis | Conditionally resistant |
| Strong alkalis | Conditionally resistant |
Moisture absorption
Polysorb disc springs absorb moisture, which alters their mechanical properties. However, in the worst case scenario - a long-term application in water - Polysorb disc springs still have a maximum spring force of 2.24 lbs.Increased temperatures
Increased temperatures reduce the rigidity of plastics. Polysorb disc springs still have a maximum spring force of 1.80 lbs even at the maximum permissible temperature of 176°F. The spring force in ambient temperature is shown in graph 35.2 (right).
Dimensions according to DIN 2093
Polysorb disk springs
De [inch]: |
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Di [inch]: |
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| Part no. | Standard values: Spring deflections and spring forces | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| De | Di | t | h0 | S0.25 | F0.25 | S0.5 | F0.5 | S0.75 | F0.75 | F1.0 | M | |||
| [mm] | [mm] | [mm] | [mm] | [mm] | [N] | [mm] | [N] | [mm] | [N] | [N] | [g] | |||
| JTEM-05 | 10 | 5.2 | 0.5 | 0.25 | 0.06 | 1 | 0.13 | 2.4 | 0.19 | 3.6 | 5 | 0.04 | 3.08 EUR | |
| JTEM-06 | 12.5 | 6.2 | 0.7 | 0.3 | 0.08 | 3 | 0.15 | 5.1 | 0.23 | 8 | 10 | 0.11 | 3.24 EUR | |
| JTEM-08 | 16 | 8.2 | 0.9 | 0.35 | 0.09 | 4 | 0.18 | 8 | 0.28 | 11 | 16 | 0.2 | 3.26 EUR | |
| JTEM-10 | 20 | 10.2 | 1.1 | 0.45 | 0.11 | 5 | 0.22 | 10 | 0.33 | 15 | 24 | 0.33 | 3.33 EUR | |
| JTEM-12 | 25 | 12.2 | 1.5 | 0.55 | 0.14 | 9 | 0.28 | 18 | 0.42 | 27 | 45 | 0.85 | 3.77 EUR | |
| JTEM-16 | 31.5 | 16.3 | 1.75 | 0.7 | 0.18 | 15 | 0.35 | 32 | 0.53 | 51 | 65 | 1.44 | 4.24 EUR | |
| JTEM-20 | 40 | 20.4 | 2.25 | 0.9 | 0.23 | 35 | 0.45 | 70 | 0.68 | 110 | 130 | 3.1 | 4.47 EUR | |
| A500TEM-05 | 10 | 5.2 | 0.5 | 0.25 | 0.06 | 1 | 0.13 | 2.4 | 0.19 | 3.6 | 8 | 0.04 | 5.08 EUR | |
| A500TEM-06 | 12.5 | 6.2 | 0.7 | 0.3 | 0.08 | 3 | 0.15 | 5.1 | 0.23 | 8 | 15 | 0.11 | 5.35 EUR | |
| A500TEM-08 | 16 | 8.2 | 0.9 | 0.35 | 0.09 | 4 | 0.18 | 8 | 0.28 | 11 | 24 | 0.2 | 6.26 EUR | |
| A500TEM-10 | 20 | 10.2 | 1.1 | 0.45 | 0.11 | 5 | 0.22 | 10 | 0.33 | 15 | 35 | 0.33 | 6.31 EUR | |
| A500TEM-12 | 25 | 12.2 | 1.5 | 0.55 | 0.14 | 9 | 0.28 | 18 | 0.42 | 27 | 70 | 0.85 | 8.15 EUR | |
| A500TEM-16 | 31.5 | 16.3 | 1.75 | 0.7 | 0.18 | 15 | 0.35 | 32 | 0.53 | 51 | 85 | 1.44 | 11.47 EUR | |
| A500TEM-20 | 40 | 20.4 | 2.25 | 0.9 | 0.23 | 35 | 0.45 | 70 | 0.68 | 110 | 150 | 3.1 | 15.78 EUR | |
More about selected part:
The standard values for the spring deflections and spring forces feature rounded average values.
Formula symbol, description and units:
| F | = Force |
| S | = Spring deflection |
| De | = Outer diameter [in] |
| Di | = Inner diameter [in] |
| t | = Thickness of the single disc [in] |
| h0 | = Maximum downward deflection of spring [in] |
| S0.25 | = 25% of the maximum downward deflection [in] |
| F0.25 | = Spring force with 25% downward deflection [N] |
| S0.5 | = 50% of the maximum downward deflection [in] |
| F0.5 | = Spring force with 50% downward deflection [N] |
| S0.75 | = 75% of the maximum downward deflection [in] |
| F0.75 | = Spring force with 75% downward deflection [N] |
| F1.0 | = Spring force with 100% downward deflection [N] |
| M | = Weight of a single disc [oz |
Generally ships within 5-15 working days
