What is the RPM rating for the CMCST920M1? Wilson February 25, 2021 21:30 Updated The RPM rating is 0-4600 / 0-6000 . It is a 2 speed unit with a variable speed trigger. Related articles What is the cutting height on the CMXGMAM201102? What is the part number for the hook and loop pad for the model # CMEW231? Comments 0 comments Please sign in to leave a comment.