... outside dimensions, length to 747 minus on Ampco end. Mill groove on O.D.of jaw number10,drill and ... jaw. Carburize 1.5mm deep,mask ends. Finish mill front of jaw, drill and tap M8 holes on ... . Weld on Ampco 18. Mill Ampco 18 End and complete grease grooves Split jaws Mill 18°angle and slot, use ... fixture. Mill cone angle, drill ...