Erpm limits on the Focbox? Eric Wilson November 03, 2017 16:47 Updated Follow Well there's a myth going around that it is 60K ERPM which is fine. We've tested it to 100k ERPM. Related articles How do I configure my Focbox? What is FOC mode? Focbox Physical Dimensions Why are the motor wires different on the FOCBOX to the VESC-X? What is BLDC mode? Comments 0 comments Article is closed for comments.