Bergeon 5356 mainspring winders shown in detail and use.
All possible measurements shown in a chart.
Four different options using the same mainspring and barrel when the fit is not perfect.
In this scenario, arbour number 10 fits the mainspring well and drum number 11 fits the barrel well.

1. Arbour number 11 (red) and drum number 11
2. Arbour number 10 (red) and drum number 10
3. Arbour number 10 (red) and drum number 11
4. Arbour number 10 (blue), drum number 10, drum number 11

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Selection of tools I use:

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* Affiliate Links Disclaimer:
This description contains affiliate links, which means that if you click on one of the links with an asterix (*) and make a purchase from Amazon, I’ll receive a small commission at no extra cost to you.

Thank you for your support,

Leo
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Timestamps:
0:00 Intro
0:12 Overview
11:54 Bergeon measurements
12:27 My measurements
14:36 Chart
15:51 Finding correct arbour and drum
17:26 Arbour 11 (red) & drum 11
20:24 Arbour 10 (red) & drum 10
23:52 Arbour 10 (red) & drum 11
27:43 Arbour 10 (blue) & drum 10 & drum 11
32:16 Conclusion