Reply To: Belt Type and Size needed for Graves MKIV machine? › Forums › Faceting Machines › Belt Type and Size needed for Graves MKIV machine? › Reply To: Belt Type and Size needed for Graves MKIV machine? February 13, 2018 at 7:30 pm #3943 gemcutter1Participant @gemcutter1 I have a 6 year old Mark IV. The belt broke. I measured it at 8 1/2 inches dia. I ordered it from Granger. It will be here tomorrow, just 3 days. Item number–1KLK8–$5.25 plus shipping for 5