Non-magnetic beryllium alloy NIVAROX
Dimensions: Movement size in Lignes/inner balance rim diameter in mm
Instructions:
1. measure inner balance rim diameter
2. determine beat rate
3. multiply balance rim diameter by beat factor
4. select suitable coil spring
Beat factor:
18000/h => 1,000
19800/h => 0,909
21600/h => 0,833
28800/h => 0,625
36000/h => 0,563
Example:
Measured inner balance rim diameter: 11.3 mm
Beat rate 21600/h => 0,833
11.3 mm x 0.833 = 9.41 mm
The best fitting coil spring is therefore: 8 3/4'''-9.4 mm
Please note: This is a raw hairspring that needs to be modified and regulated.
| Type: | Not Specified |
