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The Basics of the Boring Process

The process of Boring, a crucial step in machining, is employed to enlarge a hole in a part after the initial drilling produces it. Using a single-point cutting tool or boring head, the boring operator makes adjustments to the drilled or cast hole. Various tools are used in boring, such as awls, gimlets, and augers. The most basic boring tool is the awl. The awl enlarges the hole by pushing the excess material to one side without removing it. The cutting edges of gimlets and augers create the hole by removing material.

Basic Boring Processes

Let’s delve into the world of boring processes and equipment. There are multiple methods and tools used to produce different results in boring operations. These include:

Jig Boring, a process known for its precision, can make exact adjustments to the table and the cutting tool position to work within tolerances within ±.005 mm (±0.0002 inches). This feature allows Jig Boring to produce exact diameters and locations when enlarging the hole.

Horizontal Boring operates on a horizontally clamped workpiece, utilizing a movable column that supports the spindle headstock and the workpiece receptacle. This practice allows it to enlarge the existing hole with a highly accurate cylindrical surface. The table, planer, and floor are the main types of Horizontal Boring.

Vertical Boring is a versatile process that employs a rotating piece attached to a large horizontal table. It can perform a wide range of operations, including turning, boring, facing, tapering, and cutting of internal and external threads, making it a highly adaptable and efficient technique.

Line Boring is a precise process that uses a cutting tool held within a boring head to enlarge an existing hole. It is particularly effective in producing perfectly straight and aligned bores, providing a high level of accuracy and quality in the final product. 

Universal DeVlieg offers innovative and cost-effective tool holding and high-precision boring solutions to the machine tool industry, serving a diverse customer base. The combination of over 32,000 active part numbers, more than 10,000 standard items, and our technical support staff delivers design engineering expertise unmatched in the industry. To learn more about Universal DeVlieg, contact us at This email address is being protected from spambots. You need JavaScript enabled to view it.m or 877.308.3077 or visit  universaldevlieg.com.