I spoke to my contact at Dexter about your Torflex axle with the serial number "D4620466". They informed me that this axle has a 3,500 lb capacity and uses a L68149 inner and L44649 outer bearing. If you are looking for a bearing kit then you can use part # BK2-100 but if you need the hub/drum then you can use part # AKHD-545-35-K.
I have attached a review/install video on both options for you as well. view full answer...