SANBORN – November 06, 2026 -- Resharpening worn carbide cutting tools can restore performance at a fraction of the price of a new tool, according to a HelloNation article featuring Carl Ciesla, a cutting tool expert based in Sanborn, New York.
Precision grinding restores edges close to original specifications
Resharpening uses precision grinding to bring a worn cutting edge back near its original specification. Gradual edge wear is the best candidate for regrinding. Chipping, cracking or fracturing of the carbide substrate often rules a tool out.
Pulling tools early preserves the number of possible regrinds
A tool withdrawn at the right point in its wear cycle can often be resharpened multiple times. Waiting too long means more material must be removed to restore the edge, which reduces the remaining resharpens. Lakeshore Carbide Inc. operates in a production environment where these timing decisions affect tool value and machining output.
Regrinds cost a fraction of new solid carbide end mills
The article says the price gap is substantial for medium to large solid carbide end mills. Shops that track tooling expenses closely often find that resharpening programs lower per-unit costs and extend the productive life of existing inventory.
Simple geometries perform best after regrinding
A grinding operation that follows the original geometry can produce an edge comparable to a new tool in many standard applications. Tolerances and surface finish may vary slightly with geometric complexity and grinding equipment capability. Standard end mills and drills with straightforward geometry are the strongest candidates. Specialty tools with complex profiles, multi-radius features or tight dimensional tolerances need further evaluation first.
Fewer new tools reduce raw material and energy demand
Each resharpened tool avoids new demand for raw carbide powder, the energy used to press and sinter tooling blanks, and the packaging and transport of a new shipment.