在机械制造业和修配工作中,攻丝是常见的活。在大批生产中通常采用专用设备,一般是在钻床上攻丝。钻床攻丝虽比手工攻丝省力,而且效率高、但有的不能自动退丝。在大闹技术革命中,各厂的工人同志们对攻丝工作作了巨大的努力,创造了不少以机械代手工,能够保证优质高产的攻丝工具,但这些工具多半是齿轮传动。齿轮传动有如下的缺点:1)工具本身结 Tapping is a common activity in machinery manufacturing and repair work. In a large number of production is usually used special equipment, usually tapping on the drilling machine. Drilling tapping than manual tapping effort, but also high efficiency, but some can not automatically return. In the noisy technological revolution, the workers’ comrades at the factories made tremendous efforts in tapping work and created many tapping tools that can be hand-made by machines to ensure high-quality and high-yielding products. However, most of these tools are gear drives. Gear transmission has the following disadvantages: 1) the tool itself knot