space between the shaft and the stingers

[silver]

I'm wondering if it is good to have a 4mm space between the shaft and the singers, my flexible shaft has a lengt of 250mm.
it is said that you have to have the diameter of the flex shaft 1/4 as a space.
IMG_0334.jpg
I hope this is not too much so there will be too much friction on the engine bearings.
some good advice from you guys would be cool.
thanks

[kevinpratt823]

You'd be better off posting this in the questions and answers forum.
It does look like a bit much(to me), but I don't see how that would put any more load on the motor bearings. I use thrust bearings between the coupler and motor as much as possible anyway, that takes a lot of load off the motor bearings if set up right.

[Basstronics]

You need a gap equal to the flex cable diameter, or close to as it contracts under load.

So if you have done that you are good.