A client from the lawn and garden industry came to us for a spring that would be used on a commercial grade lawn mower. They needed a standard design compression spring with ground ends and a zinc plated yellow dichromate finish. We fabricated this compression spring on our CNC spring former and our CNC spring grinder from 0.112″ diameter spring steel music wire. The springs were de-burred, plated with yellow zinc, and heat treated to 500°F.
The final dimensions of the springs measured 0.720″ outer diameter, 0.496″ inner diameter, and 3.000″ of free length with coil specifications of 87.4 lb/in. spring rate, 13.5 total coils, and 11.5 active coils. All compression springs passed dimensional and visual inspections and tension/load testing. We produced 500 units in 3 weeks while upholding tightest tolerances of ±0.008″.
Working closely with each client to design and produce springs that meet their specifications, Kehr-Buffalo Wire Frame’s knowledge and experience sets us above the competition.
Please contact us to learn more about this fabrication of a steel compression spring project or refer to the table below.
|This spring is used on a commercial grade lawn mower
|Precision Spring Capabilities
|Equipment Used to Manufacture Part
|CNC spring former
CNC spring grinder
|Overall Part Dimensions
|O.D.: ∅ 0.720"
I.D.: ∅ 0.496
Free Length: 3.000"
|Music Wire – Spring Steel
Dia.: ∅ 0.112"
|Yellow Zinc Plated
|Spring Rate: 87.4 lbs./inch
Total Coils: 13.5
Active Coils: 11.5
Heat Treated: 500°F
|In process testing/inspection
|Dimensional Inspection, Visual Inspections, Tension/Load Testing
|Industry for Use
|Commercial lawn and garden equipment
|New York State
|Customer Specifications, 2D CAD Drawing