All Righty ... What's on the bench today?

[Heavens Eagle]

I have one of the OLD Dremels which with the right chucks run true. I have several sets of chucks and several years ago I bought a set that go on and tighten by hand. That set mostly runs true and while the Dremel is a fair bit bigger and heavier, it doesn't tend to stall as easy as the smaller battery ones even at slow speeds. The external speed control gives a huge amount of control over speed and it will run slow enough that the Dremel freaks out and doesn't run right, but that slow is way under what I consider useable.
@moon puppy The big problems with Fordom and flex shafts is that you have to fight against the flex shaft. If you are doing anything DELICATE and the tool grabs the long flexible shaft jumps and you cannot hold it still when it does. Also they are EXPENSIVE!! Expect broken carbide bits if you use a flex shaft.

 

[Heavens Eagle]

its surprising what a difference a small change can make, fits perfectly now.
View attachment 191062

I should have started a thread but its a bit late now.

Just Start a new thread and take the photos so far and repost to the new thread. Not a biggie, but will be easier to follow than buried in this huge thread about everything.

 

[Sharkmouth]

The big problems with Fordom and flex shafts is that you have to fight against the flex shaft. If you are doing anything DELICATE and the tool grabs the long flexible shaft jumps and you cannot hold it still when it does. Also they are EXPENSIVE!! Expect broken carbide bits if you use a flex shaft.

True, I had to replace the duplex spring and handpiece for my Foredom CC (F Motor) and only can do delicate work when hanging the flex shaft from a post the dentist I bought it from included.