Case machined for LN nickies - how tight?

[stanglife]

I have a case that has been machined to fit LN nickies and I have the cylinders as well. During a test fit (just resting the cylinder into the case), there seems to be quite a bit of clearance - the point where the cylinder can rock slightly in the case. Is this normal? What clearance is usually required?

Thanks!

[Jeff Alton]

Call or email LN Engineering. I am sure they are happy to give you the specs. I have found Charles and his team incredibly responsive and more than willing to help.

Cheers

[stanglife]

Hi Jeff - I did just send an inquiry to LN. They are super nice - talked to them at Rennsport and Amelia. The research is half the fun

After further inspection..while they seem to rock slightly - there is no side movement to speak of once they are flat against the case.

[Catorce]

As someone who machines cases, obviously, let me tell you, the case to spigot fit is quite loose. This is normal.

I know on our cases, we make the cylinder spigots tighter than factory. I think our number is 107.05 and 109.05. However, on my case we cheat a little because we have a lot more meat than factory. Pic attached.

[stanglife]

Thanks - Mine sounds like you are describing. I was just looking at it and it's close..just not "tight" - which is probably intentional and needed.

[Catorce]

Looks fine. It will not be a tight fit.

[cnavarro]

The minimum clearance between the case spigot and the cylinder skirt is about .004".

[stanglife]

Thanks guys. I’ll likely send the case to LN to have checked and basically help me prep everything for assembly - so we will see for sure

When the cylinder is flat to the case, there is no perceivable movement at all side-to-side. It’s only until it’s flush against the block, that it seems a bit loose.