The Advantages of Regrinding Carbide Cutting Tools

In today’s volatile economy marked by fluctuating prices, material shortages, and unpredictable shipping delays, manufacturing operations must tighten budgets and seek reliable sourcing alternatives. Metal cutting tools, particularly those made from carbide alloys, are often overlooked as a cost-saving opportunity.

Despite being treated as consumables in many facilities, both standard and specialized carbide cutting tools can be effectively reconditioned. Using specialized regrinding and recoating processes, Knight Carbide expertly restores carbide tools, extending their service life and helping reduce costs.

What Makes Regrinding Carbide Cutting Tools a Good Idea?

Carbide, which is available in a number of different grades or alloys, combines a carbon matrix with metal powders and binders to create an extremely hard and durable compound, in some cases second only to diamond. These materials, however, can be difficult to reliably source and are prone to sudden price shifts. Due to prevailing misconceptions that carbide cutting tools are disposable, most shops don’t consider reconditioning as a feasible option. 

However, with proper tool management and the assistance of a regrinding service provider, manufacturers and fabrication companies can enhance operational efficiency in four key ways.

1. Sustainability: Regrinding carbide drastically reduces reliance on costly raw materials and is more energy-efficient than fabricating new cutting tools, allowing shops to better align with their sustainability goals.
2. Cost Reduction: By reconditioning carbide tools, manufacturers can double the lifespan of their tooling. In some cases, grinding can resize tooling reducing the need to invest in additional assets.
3. Lean Manufacturing Aligned: Regardless of the methodology used to streamline manufacturing processes, the overall theme remains the same. Reduce wasted resources. Regrinding is a simple and effective method that aligns perfectly with lean manufacturing.
4. Predictability: Regrinding carbide tools mitigates the risks of raw material scarcity and price volatility by providing shops with predictable tooling costs and reliable delivery. This prevents fabricators from having to absorb sudden price hikes and manage unplanned delays.

When Does Replacement Make More Sense?

There are a few notable circumstances in which regrinding carbide inserts and other cutting tools isn’t a suitable option, including tool size, geometry, and condition.

• Specific Design Features: While standard and custom tools are both compatible with regrinding services, inserts and tools with particular features, such as inserts with pressed chip breakers on the top surface, are too difficult or impossible to grind back to their original geometries.
• Tooling Size: Smaller cutting tools and carbide inserts are more difficult to regrind. They may not have enough material to support original geometries, tool holders and equipment paths may be unable to adapt to altered dimensions, and regrinding small carbide tools isn’t as cost-effective as regrinding larger ones.
• Tool Condition: Once the tool breaks, whether it’s a chip, crack, or complete failure, regrinding is no longer an option. Pulling the tool from service before this point and following proper tool management processes is critical to extending tool life and preventing unnecessary replacement costs.

Tool Management Strategies Required for Successful Carbide Regrinding Programs

Carbide alloys are designed to cut through metal and other hard materials. However, carbides engineered to resist wear are more brittle, while those designed to withstand shock damage wear down more quickly. Careless handling and improper storage of new and used carbide cutting tools often render them unfit for regrinding. In order to get the most out of your investment, use the following tool management strategies and partner with carbide tooling experts.

• Train tool crib personnel, machine operators, and shop floor workers on proper tool handling and management best practices.
• Remove dulled carbide cutting tools and inserts before signs of damage such as chipping or cracking.
• Do not allow tools to knock together or bump into other objects, as the impact can cause irreparable damage to the cutting edge.
• Carefully place the used tool into the original packaging or similar storage containers to prevent damage during shipment.
• Develop a detailed regrinding plan that includes:
  • Size changes and necessary offsets
  • Minimum usable size
  • Regrinding criteria
  • Scrapping guidelines
  • Traceability
• Clearly define who is responsible for inspecting tools for regrinding compatibility.

Regrinding Carbide Tools Done Right at Knight Carbide

With over 50 years of experience as one of the industry’s leading manufacturers of carbide inserts, cutting tools, and holders, we know how this innovative material behaves under pressure. From custom tooling that reduces changeover requirements to precision regrinding of standard and specialized metal cutting tools, you can place your trust in Knight Carbide. Contact us today to learn what we can do for you.