about cutting tool consumption ratio

This is a complex and variable subject, so many factors would come to bear on this problem.

1- Material to be machined,

2-Cutting tool design and composition,

3- Cutting speed and depth of cut,

4-Coolant and lubrication properties,

5-Tool position, and stability of machine tool.

If you have a specific material to be machined it would be most practical to ask the tool manufacturer for the best recommendation as they have done an enormous amount of testing in this area and have this data at there finger tips.

Or you could look at it as a businessman rather than an engineering process problem.

In North America NAICS 3327 I would argue that the rate is significantly lower than 10% of Sales.

If it is higher than 10% of sales, there is insufficient value add in your process.

A business making low precision axle shafts for garbage cans, lets say, would be low value add, and so we'd expect higher percentage of tool cost per sales dollar, even though they are buying few tools.

A business making ultra high precision medical parts would likely pay more for tools, but this would be a smaller percentage of sales as the higher value added in these parts is significant.

Otherwise, as Garth has pointed out, to get apples to apples comparison you need to benchmark all the hardside- Machine, Materials, Tooling, and Softside- Man, Method , and Job attributes - surface finish, in^3 (mm^3) of removal, precision held, etc.

So you can be frighteningly precise looking at it micro view per job, or close enough using aggregate % of sales.

Smart shops look at Tool consumption per job vs their estimated usage (what they quoted) to close out a job and take actions appropriately.

my 2 cents.

milo

Thank you very much for giving insight.

Regards,

Santosh