Parabolic Springs are an Upgradation in technology from leaf springs. In a parabolic spring the individual leaves work like springs and so reduce the demand on raw material for a certain load bearing spring. It is estimated that a parabolic spring utilizes at least 35% less raw material for the same capacity of a leaf. APIL has a state-of-the-art CNC parabolic spring manufacturing machine with a capacity of making parabolic leaves upto 50mm thick and 125 mm wide. This gives APIL the ability to make a spring from a 2 kg weight to 350 kgs.
Specifications of Steel used
|EN 45||51 Si7||SUP 6||9260/9255|
|EN 45A||55/Si7/65 Si7||SUP 7||9260|
|EN 47||50 CrV4||SUP 10||6150|
|EN 48||50 CrV3||SUP 11/11A||5150|
Spring Span Up to 2500 mm
Camber Up to 250 mm
Weight 2.0 Kgs-350 Kgs
Assembly 100% shot peening of leaves. Stress peening if required (as per customer’s specifications)
ALL FITMENTS Eye Bushes(bronze, stel or rubber) Clamp, Clamp Bolts, Centre Bolts, Nuts & Rivets (as per customer’s specifications).
Inter leaf lubrication Grease Graphite or Graphite Coating.
Surface Coating Red Oxide Black Paint / Zinc Rich Primer/ Galvanised Spring – Salt Spray Test from 150 to 600 hours as per customer requirements
Protection Painting & Baking
Eye size inner Diameter 50 mm and above
Types of main + 2nd leaf Normal or Berlin Eye
Other leaf ends Parabolic, Plain, Tapered or Taper-rolled and Trimmed
Type of Finishes Zinc Rich Primer, Volvoline Coating, Enamel Paint or Galvanised