CNC: Morse taper – the inside story
Morse tapers are very commonly used in both CNC turning centers and CNC machining centers. Here is an explanation on what a Morse taper is. A taper is of course the best way of achieving concentricity between two components. Mating cylinders necessarily need to have a clearance, the male being of smaller diameter than the female. This clearance causes an axial shift between the parts. Mating tapers with the same angle, on the other hand, are forced to be on the same axis.


While browsing the web one day I found to my surprise that Morse tapers are commonly used in orthopaedic implants too, like in the artificial hip joint in these pictures.


Text source: CADEM NCyclopedia multimedia CNC training software.

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Litti Chokha at the Potbelly cafe
I recently had a very nice Bihari dinner in Delhi at a restaurant called the Potbelly, that has lovely ambience and great Bihari food (I only hope that the name wasn’t inspired by my pot belly).


Had Litti Chokha, a very simple but interesting dish. The Litti is a spherical shell made of wheat, stuffed with spicy sattu (gram flour). The chokha is a baingan ka bharta (mash of roasted brinjal, onions and tomatoes). It played an important part in the 1857 War of Independence. Because it is so simple to make, it was the favourite travel meal for small clandestine armies – no need for water or utensils, only needed a small fire for a short while, and could stay for two or three days. If you don’t want to use a fire, you can even sun bake the Litti.


Bengal gram, and Sattu
The Potbelly has a large menu of Bihari food, including Aloo Lalu Chop (named after the infamous Lalu Prasad Yadav) and Phish Phingers – (which is how Fish Fingers are pronounced in Bihar).
