apr 28, 2021 the emax evolution starts at $1160 for the base system with controller, motor, and grinding attachment, and adding additional heads and accessories will run a few hundred dollars. but with pro-level quality and support, its still a bargain. to learn more about the emax evolution, contact cherry tree toys at 608-302-4675, check them out on,grinders okuma gosiger,our popular gi series enables accurate i.d. work on a broad range of part sizes. from bearings to jet engine parts, there is a gi series grinder that offers a heavier base and okuma-engineered drives and motors, all perfectly matched to create machines that hold tighter tolerances and deliver higher speeds and feed rates to get your job done better and faster.