精密孔的加工是生产过程中常遇到的问题。虽然铰削能加工精度达0.002时公差的孔,但由于相同号数的铰刀之间缺乏一致性,通常不用铰削而主张采用其它精密加工。用“标准”机用铰刀进行铰削,在大多数情况下,铰刀是由制造厂设计的,而采用专用铰刀又只有在成本许可时才有经济效果。切削条件是影响铰刀性能的唯一因素。 Precision hole processing is often encountered in the production process problems. Although reaming can produce holes with tolerances of up to 0.002, other precision machining is often not required because of the lack of uniformity between the same number of reamers. Reaming with a “standard” machine reamer, which is designed by the manufacturer in most cases, and a dedicated reamer only has an economic effect when cost permits. Cutting conditions are the only factors that affect reamer performance.