Factors to Consider in Vertical Boring

Machines with Superior Versatility

Big industries today tend to use boring mills from TOS for their machining operations. When there is a high demand in productivity, all within a tight schedule, these machines become indispensable. Boring also requires a machine with a high level of versatility to ensure that the holes are dimensionally accurate.

A boring mill enlarges a drilled hole. It is also used for roughing and finishing internal surfaces. The biggest advantage in using a boring mill as opposed to other machine tools lies in the fact that very large parts can be efficiently machined thanks to its large configurable envelope.

Factors to Consider When Using a Vertical Boring Mill

Vertical boring mills are commonly used on workpieces that exceed the 60” envelope dimensions. Other machining centers do not have the capacity to handle these sizes. There are different factors that need to be taken into account for a proper and safe boring process of such large projects. Tool overhang, the diameter of the tool, chip control, cutting fluid, damped tools, tool coupling – all of these need to be checked and adjusted as needed to ensure a smooth process and accurate boring. Limiting overhang, for example, helps avoid the risks of deflection that can contribute to chatter and insert failure. It is also important to use the largest tool diameter and the shortest overhang possible because, for each length that the tool is extended, deflection can increase up to 8 times. Furthermore, because in vertical boring mills it is the workpiece that turns while the cutting tool remains stationary, it is important to ensure that the project does not involve pieces over 3 feet in length. Larger pieces would be harder to manipulate. If you require further advice on your boring process, do not hesitate to ask our technicians.


Can you provide more detail on the maximum sizes please? Thanks
Posted by: Omar W. | August 10, 2016, 5:32 pm
What do you mean by "envelopes"?
Posted by: Burman | June 10, 2016, 3:29 pm
*** Your email address will not be published.