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The problem is that offset flange provides the self-extraction of the collet. When you loosen the nut it pulls down on the collet and pulls it out of the chuck. Without it you can take the nut off and the collet and tool will remain stuck in the chuck.

Yes. I'm not asking to try and find one without it. I'm asking because I bought a nice ball bearing ER25 nut which didn't have it, and I'm trying to find out if it's just defective, or if I accidentally bought some special style of nut which doesn't have it.

Has anyone ever heard of an ER nut not having the offset flange?

I know, but when I try to actually pay it rejects me.

I'd love to buy from Arc Euro Trade, but unfortunately they won't process my American credit cards.

Would someone please tell me the difference between a type B and a type KM ER nut? From what I can tell there really isn't any difference. Type B: http://www.amazon.com/dp/B00DVTKI7C/?tag=skimlinks_replacement-20 Type KM: http://www.amazon.com/dp/B00R11N8W8/?tag=skimlinks_replacement-20

Most of the flex isn't coming from the column itself, but from the column to base connection. With the tilting column it's only held down by three bolts at the front edge of the pivot, and the rest of the pivot and column is just left cantilevered out from the base. The plates you see being...

http://www.grizzly.com/products/4-Rotary-Table-w-Clamps/H5685 The perfect rotary table for the mini mill. Can be used vertically or horizontally. Features a whole degree scale on the dial, worm gear drive, lash adjustment screw, reference lines and ball bearing rotary support. Comes supplied...

Bump! Prices lowered to $30 and $38.

Just to follow up, I ended up buying an ER25 system for the mill and couldn't be happier. I hope to add a ball bearing nut to it soon, which should make it even nicer to use.

I have three brand new MT3 chucks for sale: - ER25 with M12 drawbar bar thread - ER25 with 3/8-16 drawbar thread - ER32 with M12 drawbar thread The M12 ER25 and ER32 chucks would be perfect for a mini mill. The chucks are rated to have 0.0004" runout or better. I'd like to get $32 for...

I tried to buy the one on Arc Euro Trade, only to find out my Visa doesn't work in the UK. That's why I've been trying to find one in the USA.

I've been trying to find a place in the USA to buy an ER25 ball bearing nut, but haven't been able to find a single place. Could someone please point me in the right direction?

Per the SKF catalog it looks like their automotive grade 30206 has a max TIR of 0.0007". The 30206 is only if you have a MT3 spindle. If you have a R8 then the bottom bearing is 32007.

You don't need to bring the bearings or bore the bearing seat deeper. You only have an extra 1.5mm extra on each end and it's fairly easy to deal with. For the shields I prefer to use HDPE from an empty milk jug. It's very easy to cut using a simple compass cutter. It works very well. Of you...

The X2 comes stock with deep groove ball bearings. I've upgraded my mill to angular contact bearings. Neither tolerate shock loads nearly as well as low tolerance tapered roller wheel bearings.

I love this solution. It's elegant.

I was hoping to use the drill bits I already have without having to buy another set of stub drill bits.

What would you consider large diameter?

I heard that you can clamp the flutes of a drill bit with an ER collet. Is this true?