Blanchard Grinding, technically referred to as Rotary Surface Grinding, quickly removes stock from one side of a part. Abrasive stones are used to remove stock from the workpiece. Magnetic materials are held in place with an electromagnetic chuck. Dimensional tolerances of approximately 0.001" parallelism and flatness per foot of diagonal of part are achievable on Blanchard Grinders. Surface finish typically will run 63 microinch rms and as high as 32 microinch rms with certain material. Using significantly greater horsepower than other grinding methods, Blanchard Grinding removes large amounts of stock quickly and efficiently.
Ideal for large parts such as rotary tables, side plates, and vacuum chambers, Blanchard Grinding adds size versatility, eliminates mismatches, and speeds turnaround time on large parts when compared to flycutting. This method provides a considerable time savings over surface grinding as well.
Premachining costs and turnaround time can be reduced by simultaneously Blanchard Grinding multiple parts. Multiple part grinding, along with cutting a large, Blanchard Ground blank into smaller parts, provides uniform part-to-part thickness tolerances and surface finishes at a lower unit cost.
Withers Tool, Die and Manufacturing operates (4) Blanchard Grinders. The largest has a 120” chuck that is capable of swinging up to a 144” part. The balance of the Blanchard Grinders have chucks of 42”, 60” and 66” diameters.