When the drill bit is rotated, a lateral force (centrifugal force) is generated to cut the hole wall and enlarge the hole diameter. Eccentric drill bits are used to extend the depth of casing penetration or to enlarge easy-to-reduce hole sections.
Shandong Hengwang Group Co., Ltd., as one of the top drilling machinery and piling machinery suppliers in China, has 20 years of experience in the production of drilling rigs and piling machines.
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