70. Boring holders – ISO nomenclature
Updated: Oct 28, 2019
CNC: Boring holders – ISO nomenclature
Like inserts and turning holders, boring holder names too follow an ISO nomenclature standard. Also, like for inserts and turning holders, if you have anything at all to do with tool selection on CNC lathes, you need to understand this nomenclature.
This document on ISO nomenclature for CNC turning and boring holders has the details of each parameter in the name.
More (actually prior) reading Positive, Negative inserts
Text and pics. source: CADEM NCyclopedia multimedia CNC training software.
Cats in Colaba
In Colaba market in Mumbai one evening, I was just hanging around watching life go by. It’s a charming little neighbourhood market where everybody seems to know everybody else, and people are sitting around chatting in front of shops.
I saw a whole lot of cats doing the same thing that I was doing, just hanging around. Being fond of cats (much to the disgust of my two dogs Laila and Shakuntala), I asked the nearby shop’s owner whose they were, and he said that they were his. They lived in a little shed next to his shop, where they slept through the day, and he let them out in the evening. It’s the first time I’ve come across a shop owner who’s combined his love for animals with his profession this way.
There’s actually a breed of cats called the Bombay cat. It’s a cross between a black American Shorthair cat and a Burmese sable (sable means sandy color) cat. The Bombay cat looks mostly like a Burmese, but is black.
Indian black panther
The Bombay was created by a cat breeder in the US, Nikki Horner, who wanted a cat that looked like a miniature version of the Indian black panther (Bagheera, in the Jungle Book movie). Bad news for my dogs Laila and Shaki is that the Bombay is serious competition for dogs. It’s supposed to be a mischievious combination of a cat, a dog and a monkey that can be leash trained (so it’ll go on walks with you) and can play ‘fetch’. And unlike the typical cat that’s not given to open displays of affection, the Bombay likes to hang around in your lap.