Brass Timing Wheels

Brass Timing Wheels

A brass timing wheel was needed by a defense contractor and they turned to Wisconsin Metal Parts to handle this important die stamping project. These wheels required us to build the Class A, fully sensored, progressive stamping dies. The stamping process runs at 600 strokes per minute. The timing wheel measured .34” in diameter and was .018” thick. We maintained manufacturing tolerances of.005” for true position, .0015” for total runout, and hold a 1.33 Cpk over millions of parts. In-process inspections were performed using our Smart Scope Video Measuring Machine to make sure parts were being made to print. As part of a highly regulated munitions application, final testing of this part was done after the assembly was complete. This required us to lot control all production parts and hold tolerances tighter than the part print called out to insure the final assembly would not fail. Our engineering team worked hard along with our customer to put a solid quality and production process plan in place to run these mission critical parts. We have succeeded where others had failed. Our customer benefits.

WMPI has also added a secondary operation with the insertion of studs and bushings to these parts, allowing our customer to focus on final assembly of its metering units. These parts required PPAP, data collection and force testing of the studs to ensure WMPI ships good parts for assembly.

To learn more about this project, including tolerances and inspection processes, please contact us today or see the table below.

Project Details

Product Description This brass timing wheel is used within a mechanical fuze application that is very highly regulated. Final testing of this part is done once a complete mechanical fuze assembly is made, making this a key component in the function of that assembly.
Capabilities Applied/Processes
Progressive Dies
600 SPM
Equipment Used to Manufacture Part 30 Ton Bruderer
Overall Part Dimensions Diameter: Ø.34"
Thickness: .018"
Tightest Tolerances
True Position of .005"
Total Runout of .0015"
1.33 Cpk
Material Used Brass
Max Material Finish 63Ra
In Process Testing/Inspection Performed
Smart Scope Video Measuring Machine used for Inspection
First Article, PPAP level 3
Lot Control)
Fully sensored for die protection and part quality
Batch Sample retention
Material certification (Certs)
Certificate of Conformance (COC
Estimated Part Weight Less Than 1lb
Industry for Use Defense
Volume 3.2 Million Annually
Delivery Location Midwest, USA
Standards Met Customer supplied print, 2D CAD Drawing, MIL-A-2550, ANSI Y14.5M 1982
Product Name Brass Timing Wheel