Springs for sectional doors

SPRINGS FOR SECTIONAL DOORS

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.

ASK FOR A QUOTE

GENERAL CHARACTERISTICS

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

STANDARD DIAMETERS

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

AVERAGE WEIGHT (PER METER)

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:

  • Wire d. = 10,5 mm.
  • Internal diameter Di = 152,4mm
  • Lenght L. = 3500mm

Is equal to: 3,5×33,17 kg. = 116,09kg

MATERIALS

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.

HEAT TREATMENT

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.

CERTIFICATIONS: TESTING AND TRACEABILITY

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.

IDENTIFICATION

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.

PACKAGING

Because of peculiarity of those springs MOLLIFICIO PAVANO SPA offers different and specific packaging solutions.

Stackable metal crates

  • Dimensions studied for transport and stocking;
  • Dimension: 1000×3600 H800mm.

Wooden crates

  • Dimensions studied for transport and stocking;
  • Dimension: 1000×3600 H800mm. Or according to customer demand
  • Max loadable weight: kg. 2.500

TESTS

Theorical datas are verified by testing with the use of a digital torque transducer.

Keep in touch

Newsletter
Subscribe

Subscribe our Newsletter to receive our latest news on products and company

    I herewith allow MOLLIFICIO PAVANO SPA to treat my datas to marketing purposes according to the EU Rules 679/2016. For any cancellation please contact to email: contact@mollificio-pavano.it

    ASK FOR A QUOTE OR FURTHER INFORMATION ABOUT TORSION SPRINGS

    Mollificio Pavano S.p.A, springs and wire bending from 1955.

      Contact us, We will feedback to you a.s.a.p.

        Contact us, We will feedback to you a.s.a.p.