Mollificio Pavano developed an important production line addressed to the manufacturing of torsion springs specifically used for sectional doors.
Springs are generally supplied raw or prezicated. Other finishing are available on demand.
Ask for a quote or for further technical.
Below table indicates available dimensions and typologies.
| Wire Diam | Max. Lenght (mm) | COILING | MATERIAL | ||
|---|---|---|---|---|---|
| RH | LH | Phosphated | Zinced | ||
| 4.50 -12.50 | 4.000 | X | X | X | X |
Below standards internal diameter and relative tolerances:
| InternalDiameter (mm) | Tolerances (mm) |
|---|---|
| 50,80 | +0/-1,5 |
| 66,70 | +0/-1,5 |
| 95,25 | ± 2 |
| 133,35 | ± 2,2 |
| 152,40 | ± 2,5 |
Thanks to below table, you can estimate spring’s weight known internal diameter “d” and spring’s internal diameter linking it to the 1 meter spiral lenght.
| INTERNAL DIAMETER COILING | |||||
|---|---|---|---|---|---|
| Wire D. | 50,8 | 66,7 | 95,25 | 133,35 | 152,4 |
| 4,5 | 4,83 kg | 6,21 kg | 8,71 kg | 12,93 kg | 13,69 kg |
| 5,00 | 5,41 kg | 6,95 kg | 9,72 kg | 14,56 kg | 15,26 kg |
| 5,50 |
6,01 kg | 7,70 kg | 10,75 kg | 16,23 kg | 16,84 kg |
| 6,00 |
6,61 kg | 8,46 kg | 11,78 kg | 17,94 kg | 18,43 kg |
| 6,50 |
7,22 kg | 9,23 kg | 12,83 kg | 19,69 kg | 20,03 kg |
| 7,00 |
7,85 kg | 10,01 kg | 13,88 kg | 21,49 kg | 21,64 kg |
| 7,50 |
8,48 kg | 10,79 kg | 14,95 kg | 23,33 kg | 23,26 kg |
| 8,00 |
9,12 kg | 11,59 kg | 16,02 kg | 25,21 kg | 24,89 kg |
| 8,50 |
9,78 kg | 12,40 kg | 17,10 kg | 27,13 kg | 26,52 kg |
| 9,00 |
10,44 kg | 13,21 kg | 18,20 kg | 29,11 kg | 28,17 kg |
| 9,50 |
11,11 kg | 14,04 kg | 19,30 kg | 31,13 kg | 29,83 kg |
| 10,00 |
11,79 kg | 14,88 kg | 20,41 kg | 33,19 kg | 31,50 kg |
| 10,50 |
12,48 kg | 15,72 kg | 21,53 kg | 35,30 kg | 33,17 kg |
| 11,00 |
13,18 kg | 16,58 kg | 22,67 kg | 37,47 kg | 34,86 kg |
| 11,50 |
13,89 kg | 17,44 kg | 23,81 kg | 39,68 kg | 36,55 kg |
| 12,00 |
14,62 kg | 18,32 kg | 24,96 kg | 41,94 kg | 38,26 kg |
| 12,50 |
15,35 kg | 19,20 kg | 26,12 kg | 44,25 kg | 39,98 kg |
EXAMPLE of weight of spring known its lenght:
Weight of the springs with diameter:
Is equal to: 3,5×33,17 kg. = 116,09kg
Mollificio Pavano carefully selects and grades its raw material suppliers, constantly monitoring material in entrance in order to provide productive homogeneity, in compliance with International standards.
Most common material are phosphated, and zined steel according to International Rules for springs UNI EN10270:1 – class SH and equivalend DIN17223 – class C.
Material: springs steel
Standards: EN 10270:1 class SH / DIN17223:1 class C
Thickness: from 4,00 to 12,50mm.
After coiling springs are submitted to temperature relaxations.
This process is internally made by modern plants, designed and constructed by Mollificio Pavano.
Continuous in line testing grants homogeneity of springs’ performance of all productions.
Every delivery lot is trackable, and linked to a quanlity and conformity certificate, with all datas involved in productive processa as material, dimensions, and mechanical characteristics.
Thanks to specific softwares and experience our Staff provide technical consultancy in projetct and development of new and best springs.
Springs are identified by a plate indicating wire diameter and, on customer demand, the production lot.
On customer demand other identification typologies can be agreed.
Because of peculiarity of those springs MOLLIFICIO PAVANO SPA offers different and specific packaging solutions.
Stackable metal crates
Wooden crates
Theorical datas are verified by testing with the use of a digital torque transducer.
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ASK FOR A QUOTE OR FURTHER INFORMATION ABOUT TORSION SPRINGS
Mollificio Pavano S.p.A, springs and wire bending from 1955.
