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Exploring Finish Boring
Finish boring completes an existing hole producing a close hole tolerance, correct positioning, and a high-quality surface finish. Generally, it is used with small cutting depths below 0.5 mm (0.020 inch). In contrast, a straight cut in the initial hole when using a rough boring tool does not matter, it will bore true because of its forces are axial. Finish boring tools will likely follow a set path and a longer hole makes it easier for the tool to bend during cutting. Take extra caution to be sure a long hole is true before the finish pass.
Single-edge Boring
With small cutting depths of close tolerances (IT6 to IT8) or a high-quality surface finish, single-edge boring is best for finishing operations. The diameter of this fine boring tool is adjustable by microns when applied with a rough boring tool for tolerances of IT9 or larger.
Back Boring
When a hole with a shoulder that cannot be reached from the opposite direction, back boring is the answer. Additionally, because the entire hole is machined from only one position, it can optimize the concentricity of a hole with a shoulder. A boring tool is generally configured for a hole with a minimum diameter of Dc/2 + BD1/2.
External Boring
To achieve a close diameter tolerance, external finishing with a fine boring tool is in order. In an external boring operation, the mass of the slide and fine boring head rotate around the workpiece, producing high centrifugal forces. The tool is configured for fine boring by calculating the maximum cutting speed for the diameter when the head is rotated 180°.
Universal DeVlieg provides innovative and cost-cutting tool holding and high precision boring solutions to the machine tool industry, servicing a diversified customer base. The combination of over 32,000 active part numbers, over 10,000 standard items, and our technical support staff deliver design engineering expertise that is unmatched in the industry. To learn more about Universal DeVlieg, contact: This email address is being protected from spambots. You need JavaScript enabled to view it. or 877.308.3077 or visit at universaldevlieg.com.