Case Study 2 - Valve Seat Turning

• Application: Machining of hardened valve seats
• Current Tool: CBN insert
• Production Concern: Tool life
• Goals: Improve tool life
• Current Tool Life: 5,000 valves seats
• Tool Life with EMG: 10,000 valves seats

Current CBN Tool The picture shows the edge of a standard tool with 0.005” x 20-degree “T” land. In production, this tool produces 5,000 finished exhaust valve seats.

Conicity CBN Tool The picture shows a standard tool with a 0.005” x 20-degree “T” plus a 0.001” Conicity E/P. In production, this tool produces 10,000 finished exhaust valve seats.