Sonico is one of the leading manufacturers of Conventional, Parabolic and Bogie Leaf Springs in India’s Automobile Industry, is proud to announce the launch of the new parabolic assembly(

Parabolic Leaf Spring is considered as most modern technology in suspension system. Sonico has already adopted this technology long back and regularly making parabolic spring for OEM and aftermarket.

Our strong relationship with customers allows us to anticipate their evolving needs and provide integrated solutions to meet the same. Recently there is a new addition in the parabolic family. A very critical Parabolic Assembly is developed by Sonico, with grand success.

The details of the new product are as follows:
Equipment used:
For Parabolic operation
o Gas Fired walking beam type end heating furnace
o High Pressure Descaler
o Automatic Parabolic rolling machine (Servo Controlled)
o On-line Straightening Press
o Multi station Press for post rolling operations
o Instrument for profile checking

For Heat Treatment
Robotic heat treatment line with automatic swinging for fast cooling and camber stability.

For Stress shot peening
3 Turbines & 2 on line passes for two different shot sizes to ensure maximum coverage and better compressive residual stress at surface & depth.

For Painting
Automatic Line; Electrostatic Bell type.

For Assembly
Assembled in conveyorized transferring system for improved material surface quality supported by online scragging.

For more information about parabolic leaf spring visit:

About Sonico:
Our manufacturing facilities are equipped with Automatic Parabolic Rolling Line, Robotic Heat Treatment Line, Stress Shot Peening Line, Automatic Paint Line and Automatic Assembly Line with on-line CNC Scragging machine. Recipient of various awards from prestigious customers for its exemplary performance in delivery at competitive costs maintained through innovative solutions.
Company Name :Soni Auto & Allied Industries Ltd
Address: 467 & 468, Marshall House (4th Floor) 25 Strand Road, Kolkata-700001
Email :
Phone :033-3028 4828
Fax: 033-2230 7828
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