10th April 2021, 19:17
|
#18
|
|
This is my second home
R75 Saloon.
Join Date: Feb 2009
Location: France/or Devon.
Posts: 14,003
Thanks: 3,851
Thanked 2,167 Times in 1,816 Posts
|
Quote:
Originally Posted by stevestrat
I think its more than just the rubber gasket. Bit of internet digging revealed this old Rover tyre pressure gauge. As well as the gasket there's a brass screw type thing in the centre.
 |
That screw out bit is the very carefully calibrated hole that lets the air into the gauge.
If you look up Air Gauging on the internet you will find lots of info on how air flowing through a hole can be be used to very accurately gauge the diameters of holes. Also the thickness of sheet materials down to 0.00005 of an inch.[/SIZE][/COLOR] |
|
|