Industrial Spring Corporation, a high-quality extension spring design and manufacturing company, was assigned a custom music wire extension spring design and fabrication project by a client in the power lawn equipment industry. The main objective was to prevent the extension spring from breaking, an issue the client faced with their current spring. To accomplish this goal, we proposed and implemented four design changes to the current spring including changing the raw material to direct draw music wire, the finish to Magni 565, reducing the end coil & hook diameter, and adding shot peening to produce a compressive residual stress layer. These alterations were successful in improving spring performance and reducing warranty claims.
The direct drawn (.207” diameter) music wire was manufactured into a 24-coil extension spring, free length of 7.000”, O.D. of 1.750”, with tolerances of ±.013”.
It was manufactured using our state-of-the-art equipment, such as our AIM 3000 CNC spring coiler, Sleeper & Hartley looper, and Pangborn shot blasting machine. To ensure the spring met our breakage prevention objectives, we tested the part using spring rate and load testing.
Industrial Spring lived up to its reputation for rapid turnaround times and quality services by producing 7,500 extension springs in 25 days, including delivery to our client. To learn how our customer-oriented professionals can help you with your springs or formed metal projects, contact Industrial Spring.
Our client was having issues with extension springs breaking. Industrial spring proposed 4 design changes to prevent the spring from breaking.
AIM 3000 CNC Spring Coiler Sleeper & Hartley Looper Pangborn Shot Blasting Machine
Wire Diameter: Ø.207” Free Length: 7.000” O.D.: Ø1.750” 24 Coils
Direct Drawn Music Wire
Dimensional layout - Spring Rate and Load Testing
Power Lawn Equipment
25 Working Days
Customer supplied print, 2D CAD Drawing