110. Cutting parameters and tool life

CNC

Cutting cycle time without cutting tool life

Cutting speed has the highest effect on tool life.
Feed rate has a much smaller effect.
Depth of cut has almost no effect.

cutting-parameters-effect-on-tool-life

Cutting speed increase of 20% leads to tool life reduction of 50 %.
Cutting speed increase of 50% leads to tool life reduction of 80 %.

Action point
To reduce cycle time, increase the feed rate and depth of cut.
Use the cutting speed recommended by the tool manufacturer, and do not increase it.

 

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The ‘Messes’ of South India – how did they get their name ?

You’ll find a lot of small eateries called Messes in South India, that are simple places where you go for the food. They don’t serve anything other than food and water – no juices, no sweets, no desserts, and of course no booze. I’ve seen this term used for eating areas in the military or in schools or colleges, and wondered what the connection was between these.

messes-collage

The word Mess originated from the Latin Missum (something put on the table), changed to the Old French Mes (Portion of Food) and then changed finally to the to the English Mess in the 16th century. Mess meant a group of people who regularly ate together, and  the place where they ate was the Mess Hall. Mess Hall finally got shortened to Mess.

army-students-mess
Mess in the Indian Military Academy

Pic. source:  http://www.tribuneindia.com

I only recently figured out that messes are typically in localities with a lot of single people who come there to eat every day – working people who do not cook at home. And it’s usually the same set of people coming to eat at every meal. Hence calling them messes is perfectly logical.

If you want simple, cheap and authentic local food in any place, going to any place called a Mess guarantees this.


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