“金钢镗”的精镗刀具,用来切下不超过0.5公厘的裕度。镗削时只利用了硬质合金刀片的一小部分,其大部分都在重磨时白白地磨掉了。 在第聂泊彼特罗夫斯克机器制造厂使用了一种新式结构的刀具,它保证硬质合金能极充分的利用。这种结构刀具的特点是在刀杆上焊入一直径很小的硬质合 “Jingang Boring” fine boring tool, used to cut no more than 0.5 mm margin. Boring utilizes only a small portion of the carbide insert, most of which is ground off in recapture. At the Niedian-Parrotsk machine plant, a new-type tool is used, which guarantees a very good utilization of the cemented carbide. This structure is characterized by the tool is welded to the arbor a very small diameter hard cohesion