--- title: Choosing the Right Cutting Tool for Machining Aluminum Bronze description: Learn how to select the right cutting tool for machining aluminum bronze alloys — covering tool chemistry, PCD options, and the critical geometry requirements that differ from steel and aluminum machining. --- [Skip to content](https://academy.ampcometal.com/migration/en/knowledge/cutting-tool-selection-aluminum-bronze-machining#main-content) English Show submenu for translations ![logo-1.png\]](https://academy.ampcometal.com/hs-fs/hubfs/AMPCO%20CD%20elements/logo-1.png?height=40&name=logo-1.png) Open main navigation Close main navigation - English Show submenu for translations - Contact us Contact us Hello. How can we help you? - There are no suggestions because the search field is empty. 1. [Knowledge Hub](https://academy.ampcometal.com/migration/en/knowledge?hsLang=en) 2. [Machining & Tooling](https://academy.ampcometal.com/migration/en/knowledge/machining-tooling?hsLang=en) 3. [Cutting Tool Selection](https://academy.ampcometal.com/migration/en/knowledge/machining-tooling?hsLang=en#cutting-tool-selection) # Choosing the Right Cutting Tool for Machining Aluminum Bronze ## Tool Chemistry, Geometry, and Key Parameters for Optimal Results Selecting the correct cutting tool is critical when machining aluminum bronze alloys. The following guidelines apply: Tool chemistry: The preferred composition for cutting tools is 91–93% tungsten carbide (WC), 6% cobalt (Co), and 1–3% niobium carbide (NbC). For finish machining, polycrystalline diamond (PCD) tooling is also a suitable choice. Other tool types will wear rapidly if not maintained at sufficient sharpness. Tool geometry: Standard cutting tool geometries used for steel or aluminum, as described in shape profiles P and M, are not appropriate for aluminum bronze. Aluminum bronze requires a sharp but robust cutting edge with a negative back angle, as described in shape profile K. Sharp edges alone are not sufficient; the tool must also be structurally strong enough to withstand the cutting forces involved. 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