R Shape Series Led Bulb,Outdoor Light Bulbs,Candelabra Bulbs,Dimmable Led Light Bulbs Jiangmen hengshenghui Lighting Co., Ltd , https://www.jmsunbright.com The diesel engine rocker arm (Fig. 1) requires high precision, and the joint surface tolerance is strict and the machining is difficult. To this end, we designed and manufactured the fixture for drilling the center hole and drilling the oil hole (Fig. 2). The jig adopts a drilling hinge method for indexing the workpiece. After drilling one end of the center hole, the other end is turned up and down. When processing φ5.5mm, as long as the B side