Welke soorten draad zijn er?
Schroefdraad tabel
| Afkorting | Betekenis | Kenmerken |
|---|---|---|
| MF | Metrisch ISO fijn | Metrische fijne (M) schroefdraad |
| BSF | British Standard Fine | Withworth cilindrische draad met fijne spoed |
| BSP | British Standard Pipe | Withworth cilindrische draad |
| BSPT | British Standard Pipe Taper | Withworth conische draad |
What is the base 12 number system called?
The duodecimal system (also known as base 12 or dozenal) is a positional notation numeral system using twelve as its base. In this system, the number ten may be written by a rotated “2” (2) and the number eleven by a rotated “3” (3). This notation was introduced by Sir Isaac Pitman.
How were the imperial units of measurement standardized?
While standardized differently various parts of the world the Imperial Unitsessentially evolved organically over thousands of years by people. While prior to standardization not very precise measures were possible, they were all based on real world reference points that gave you an idea of their uses. Thus a foot is well the length of a human foot.
Do you still use the imperial system?
However, many of my friends and family still use the imperial system. I really do not understand why, it is so much harder to measure anything. I do have to work with both now, simply because so many clients are American and only use the imperial system. On the rare occasion that someone does use metric they always start by apologising!
What is the beauty of the imperial system?
That is the beauty of the imperial system is that because they were evolved and not specified they are naturally easier for us to relate to. In other words for the uses they were originally designed they are more usable. However the needs of engineers, scientists and 7th grade maths students are very different.