Confused about 8mm McFly

My old cheap surfacing bit with non-replaceable cutters wore out. I want to buy the 8mm McFly to use in my 65mm spindle. I have the 8mm ER-16 collet already. Why does the product page says the 8mm McFly is only for 80mm spindles?

If memory serves, at that time, we only had the Carbide Compact Router and the ER-20 spindle.

The 8mm collet for an ER-11 or ER-16 VFD spindle:

and for compleatness’ sake, an ER-20:

will then allow using any of our 8mm shank tooling:

including the 8mm shank McFly version:

So the McFly product page is out of date? There’s no problem using the 8mm McFly in the 65mm with the 8mm collet?

Correct.

I’ve put in for having that page updated.

What’s the difference between the ER-16 and ER-20 then? I need one to run a 8mm bit and I’m using the smaller VFD spindle.

Er-16 can hold up to a 10mm shaft, where as er-20 can go up to 13mm shaft

Overall collet diameter.

The various VFDs have an innate outer diameter, 65mm or 80mm — then the tool has a collet.

The 65mm has had two different sizes: ER-11 and ER-16, depending on when it was offered by Carbide 3D, while the 80mm has always had an ER-20 (from Carbide 3D).

We have a bit on the collets at:

and there are specifics of each at:

ER-11:

https://carbide3d.com/hub/docs/65mm-vfd-spindle/

ER-16:

https://carbide3d.com/hub/docs/65mm-er16-spindle/

ER-20:

https://carbide3d.com/hub/docs/80mm-spindle-kit/

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