9R

It is compose of high molecular material with a mixture of aluminium oxide, silicon carbide and cerium oxide etc. It is super wearability and strong strength but elastic. The metal compounds allow super cutting ability.

The ultra rigidity allows long lasting with high grinding efficiency.

9R is extensively used in vertical edging machine and horizontal double edging machine. Mostly it is cup wheel.

The common edge processing is to use firstly metal bond diamond wheel, then secondly resin bond diamond wheel and then 9R wheel.