The Most Accurate Lathe Chuck - The Sequel - Shop Made Tools

ER40 Vs 5C collet Chucks. Why settle for one Collet Chuck when you can make 2?
In a previous video I mounted an ER40 Collet Chuck onto my lathe, I have now built the same mount for a BISON 5C Collet Chuck.
The video explores a comparison between the two with some real-world tests to see how they compare.

So, which is best? Let’s find out.

I'm not forming any conclusions about what the final accuracy of the chucks are, I'm just making observations and you can form your own conclusions.
There are several lessons learned from this build that will cause me to completely rethink measurements in the shed.

Timestamps:
00:00 Introduction
00:35 Titles
00:55 Description
01:27 Assembling the 5C Chuck
01:50 ER Collet Chuck
02:07 ER Collet Runout observation
02:50 5C Collet Chuck
03:15 5C Chuck Runout observation
04:30 ER Collets
04:55 ER 16mm Runout observation
06:05 5C Collets
06:40 5C 16mm Runout observation
08:20 ER 20mm Runout observation
09:40 5C 20mm Runout observation
11:00 ER 25mm 3 points of Runout observations
13:40 5C 25mm 3 points of Runout observations
15:20 ER 19mm Pull Test observation, 20kg
16:30 5C 19mm Full Test observation, 20kg
17:25 ER 20mm bar machining observation
18:50 5C 20mm bar machining observation
20:40 Conclusions
22:30 End credits