The process of finish boring requires an existing hole, and it is the perfect process for short-run jobs to remove the remaining stock in the hole. Finish boring offers more flexibility when machining different hole sizes using the same tool. Adjusting the boring head can compensate for the runout if the machine tool has more runout at the spindle. Also, a finish boring head can true up a hole more accurately than other applications.

Chatter or vibrations during boring operations is generally because of instability between the cutting tool ad workpiece. Often applying a larger-diameter boring bar will eliminate the problem. However, when a larger bar is not an option, there are options to reduce chatter that can reduce productivity and affect workpiece quality.

Boring is a different process from other hole making machining operations, such as drilling and reaming. Drilling is making an initial hole and reaming smooths out the walls of an existing hole. Boring is used to produce accurate size holes within required tolerance specifications using an existing pre-drilled hole. The following are some tips to assure your boring project meets your specifications.

Boring precisely enlarges existing holes in a part. Generally, boring on a turning bar is less complex than on a milling machine. A boring bar on a lathe can make any size hole if the bar will fit into the hole. Boring heads for milling machines have a limited range. 

While the basic process of boring, enlarging holes that have already been drilled, sounds simple, it can become complex quickly. When the boring process involves intricate machined parts and materials the complexity of making pre-drilled holes larger, concentric, properly sized, or finished is more complicated projects. The following are types of boring that can get the complicated job done.

The boring process involves machining a pre-drilled or pre-cast hole with a single point cutting tool or boring head to enlarge its original size. Using a single cutting tip of steel, cemented carbide, or diamond bore, the boring machine can produce smooth and accurate holes in a part. The most common boring tools are braces, bits, and gimlets. Other tools include a joiner that uses different chisels, hand boring tools, and electric power drills. Line boring is an engine machining process to enlarge a hole, while making perfectly straight and aligned bores. A line boring machine performs this task using one or more cutting tools held within a boring head.