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84. Face vs Radial grooving tools

CNC: Face grooving tools – how they’re different from radial grooving tools

The face grooving holder is very different from the radial grooving holder. In a radial grooving holder the support section under the insert is straight, while in a face grooving holder it is curved.

Source: http://www.iscar.com

Source: http://www.taegutec.com/

Without the curve the holder will not enter the groove at all, and will foul with it. Also, because of the curve, each face grooving holder will only work within a certain groove diameter range.

Source: http://www.sandvik.coromant.com

Text source: Cadem NCyclopedia multimedia CNC training software.

Industry 4.0 and Machine monitoring CAD/CAM software, CNC Program Simulation, CNC Training software


Gothic architecture – what is it ?

I keep coming across buildings in India that are a mix of architectural styles. CST (alias VT station) in Mumbai is an amalgam of Victorian Gothic + Traditional Indian architecture.

Source: http://whc.unesco.org/en/list/945

I wondered what characterized each of these styles, and decided to start my education with Gothic. I learnt that Gothic architecture was characterized by three things: the pointed arch, the ribbed vault and the flying buttress.


Source: https://en.wikipedia.org/wiki/Flying_buttress

A vault is a ceiling that is an arch-shaped structure, built over large spaces. The ribbed vault has a complex rib structure supporting the roof, unlike the more common barrel vault has a semi-circular roof. The ribbed vault allows far more complex architecture.

The buttress is a support structure built against a wall to support the wall. The wall tends to be pushed outwards because of the weight of the roof, and the buttress prevents this. Unlike an ordinary buttress, a flying buttress does not support the whole wall. It transfers the load from the top of the wall to a vertial column and thence to the ground.

Buttress. By Maltesedog at the English language Wikipedia, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=10797645