This paper presents a grindability data collected by surface grinding of Si3N4 caramics with a newly developed wheel with cutting edges of unified height. Grindability was evaluated according to the measurement of grinding force, specific grinding energy, surface roughness and material strength after surface grinding. The wheel with cutting edges of unified height produced small specific grinding energy and surface roughnes comparable to the usual resinoid-bonded wheels. As a result of an analysis of maximum grain depth of cut of the wheel with unified height of grain cutting edges offers smaller mean value of maximum grain depth of cut, consequently the above grindability were obtained.
