Ever wondered why mechanical parts and equipment have such precise and accurate holes? It is mainly due to the boring process. Boring is a crucial process in CNC machining. This technique is widely used to finish holes in a workpiece. Even though drilling is commonly used to create holes, boring is used to refine or enlarge existing holes.

Boring Types and Categories

Depending upon the tools and holes being bored, there are several distinct types of boring processes. The first is line boring, where an existing hole is enlarged to make the centerlines more collinear. You’ll find such holes in large machine parts such as turbines and engines. The second process is back boring. The process involved reaching the back of the hole and boring at the back. Just like other CNC machining processes, boring can vary depending upon the condition of the hole.

Tools Needed for Boring Operations

CNC machines such as milling and turning centers can be used to perform boring workpieces. However, you can also find machines specializing in boring if you don’t want a one-size-fits-all solution. Vertical and horizontal boring machines are two types of equipment used in the process. The major difference between the two is the cutting equipment used in the process.

a CNC laser machine.

You’ll find dual-point cutting tools being used where surfaces are 180-degree apart. Single point cutting tools are used on much closer surfaces. If you’re working on challenging holes, which require ultimate precision and craft, then you’d need customized boring machinery. You can’t expect to find a single boring tool being used in every process, as every operation is different and will come with its challenges. 

When To Consider Boring

Machine operators need to consider several factors before deciding whether to use boring or not. As mentioned, boring is normally used in the process of cutting or enlarging a hole. However,, many opt for drilling or reaming instead of boring because they think these processes have a better chance of producing quality and accurate results for the required type of hole.

Furthermore, for more precise cutting and hole creation, all three processes can be used simultaneously. Drilling is used to creating a rough hole, and boring is used to enlarge it to meet the requirements. In the end, reaming may be used to apply the finishing touches to make the hole precise and without any rough edges.

If you’re looking to improve hole precision, then boring is the right process for you. However, it doesn’t remove a large number of materials. If you’re looking for mere hole creation, then drilling should be considered.

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