MADNESS OF WHEELTRIALS

摘要

Dear Doc: I sell grinding wheels and frequently find myself pulling my hair out when recommending wheels to customers. One customer achieved great success with a resin-bond, 400-mesh diamond wheel when grinding 3/4"-dia. carbide endmills. It performed like a "superwheel." I then took that same wheel to a customer who also grinds 3/4" carbide endmills on the same machine model with the same coolant and it's a disaster. Why? The Doc Replies: All grinding wheels have a sweet spot, based on speeds and feeds, where they produce chips of an optimal thickness. Run a wheel so the chip thickness is too thin and you'll glaze the wheel. Too thick and you'll rip grits from the bond material.