Compression Spring
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.
Highlights of this Steel Compression Spring Project
| Product Description | This spring is used on a commercial grade lawn mower |
| Precision Spring Capabilities Applied/Processes |
Primary: Spring Forming Grinding Secondary: De-Burring Plating Heat Treating |
| 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" |
| Tightest Tolerances | ± 0.008" |
| Material Used | Music Wire – Spring Steel Dia.: ∅ 0.112" |
| Material Finish | Yellow Zinc Plated |
| Coil Specifications | Spring Rate: 87.4 lbs./inch Total Coils: 13.5 Active Coils: 11.5 Heat Treated: 500°F |
| In process testing/inspection performed |
Dimensional Inspection, Visual Inspections, Tension/Load Testing |
| Industry for Use | Commercial lawn and garden equipment |
| Volume | 500 |
| Delivery/Turnaround Time | 3 weeks |
| Delivery Location | New York State |
| Standards Met | Customer Specifications, 2D CAD Drawing |
| Product Name | Compression Spring |
Mailing Address: P.O. Box 806 Grand Island, N.Y. 14072-0806 Shipping Address: 127 Kehr Street, Buffalo, N.Y. 14211
