18 * 64, serrated ring is suitable for fully mechanized scraper conveyor, and SGB630/75, SGB630/150 type scraper conveyor, used to connect the scraper and the chain. Saw tooth ring is made of 23 mnnimocr54 material, material for 25 MNV commonly or link has a very important role in the operation, as a result of link quality problems begin to rupture, which can cause serious accidents. When using can be installed horizontally and vertically installed. It is connected or moved between mine ring chain. Sawtooth link is suitable for the connection between the mining high-strength ring chain link. The sawtooth type joint link can be installed in horizontal and vertical. This product unique design of tooth profile, tooth shape matching precision and easy to tear open outfit.