121.3.4 - Manual Machining

Precision Boring

Boring is a machining process in which a hole that has already been drilled or cored is enlarged using a single-point cutting tool. The primary objective of boring is to achieve precise diameter accuracy and a better surface finish inside the hole.
- While both drilling and boring are essential hole-making operations in machining, they serve different purposes. Drilling is the primary method to create holes, while boring refines and perfects them. When precision in diameter and finish is required, boring becomes indispensable.
Boring can be performed on mills, lathes, or boring machines - machines dedicated to performing boring operations

Boring Bars are fundamental tools in boring operations, employed in both lathes and milling machines.
- - Boring bars are characterized by their elongated shaft, which provides stability and minimizes deflection during the cutting process. The length and rigidity of the bar allow for deep hole boring while maintaining precision. Some boring bars shafts are made out of extremely rigid materials like solid carbide, or have built-in vibration dampening capabilities.
  - At one end of this shaft, a cutting tip—often made of carbide or other hard materials—is mounted. This tip performs the intricate work of enlarging and finishing the hole.
  - Additionally, boring bars can be equipped with coolant channels to optimize chip removal and temperature regulation, ensuring a smoother and more accurate operation.
- The design of the boring bar and the choice of cutting tip material are crucial for achieving the desired finish, size, and tolerance in a bored hole.

- Boring Heads are the most common way to perform boring operations on milling machines. Typically they consist of a boring bar mounted in a device (a boring head) that allows for precise adjustment of diameter/radius location of the cutting tool edge
- Boring heads come in all shapes, sizes, and configurations depending on the size and type of boring operations needing to be performed
- Digital boring heads are a

Page updated

Google Sites

Report abuse