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Home / Thrufeed Grinding Machine Processes Carbide Cutting Blanks in Small Footprint

Thrufeed Grinding Machine Processes Carbide Cutting Blanks in Small Footprint

Glebar’s GT-610 EZ centerless grinding machine was developed while meeting a customer’s challenging specs for cylindricity of 2 microns over a 4”-long part. That solution is now commercially available for grinding an array of hard materials.

On the 0.750” diameter carbide blanks for their customer's application, the roughing operation removed 0.012” and the finish pass removed 0.003”, improving on the 2 Rz surface finish requirement.
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A machine platform developed by Glebar Co. (Ramsey, NJ) can process carbide cutting blanks – carbide being one of the most changing materials to grind, ranging in hardness between 65 and 85 Rc. After sintering, carbide has a rough surface finish and chips easily.

Following a customer’s spec, the processes needed to maintain cylindricity of 2 microns over a 4” long part. Glebar delivered with its GT-610 EZ centerless grinding machine. The GT-610 EZ excels at thrufeed grinding hard materials such as steel, carbide, PCD inserts, and technical ceramics while operating on a smaller footprint than legacy machines.

“The GT-610 EZ uses a proven twin grip 8-5/8″ wide grinding wheel setup spreading the material removal over a longer span which results in higher throughput, less aggressive approach reducing chipping, and a smoother overall surface finish ” explained John Bannayan, chief technical officer at Glebar Co.

GT-610 EZ has the unique ability to produce G-ratios that can exceed those of machines twice its size. When running super abrasives, a variable frequency drive on the work wheel spindle is available to increase wheel surface feet.

On the 0.750” diameter carbide blanks for the customer application that resulted in the GT-610 EZ, the roughing operation removed 0.012” and the finish pass removed 0.003”, improving on the 2 Rz surface finish requirement. Glebar met the customer’s cylindricity spec of 2 microns over the 4” long part. The straightness and roundness of the parts were sub 1.5 microns.

www.glebar.com

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