Reply To: TM620 – big end bearing undersize Home › Forums › TM620 › TM620 – big end bearing undersize › Reply To: TM620 – big end bearing undersize 22/09/2016 at 14:13 #233 Keymaster A set for 2mm undersize TM620 big end bearing is not available on stock as a standard assortment part. In case of need in this special case, inquiry can be made by contacting sales@quantiparts.com.