ER16 Collet nut problem

[davo453]

I have a tale of woe

This morning I installed a 1/8 inch bit in my ER16 collet on my chinese 1.5kw spindle.

Didn't feel anything funny when I put the bit in and nut on and don't think I over tightened it; when I came to undo the nut it moved slightly but then locked up.

Spindle in the bench vise I locked the shaft but no amount of force would move it, heated it up a bit still no go.

I even managed to bend one spanner and break the jaw off on another. So Dremel in hand I cut into the nut and broke it off with a nut splitter.

It had as you guessed cross threaded, the thread in the nut was just fine (now in 2 parts) but the spindle shaft was not very good, however I chased in the threads and am pretty sure a new nut will work with it.

The spindle is quite new so facing purchasing another i'd like to try another collet clamping nut first.

On the nut it says ER16 19*1 which I take it means m19x1, it is a hex nut and is not castellated.

A look on ebay tells me that they are available but only in stock in China with at least a months wait and naturally I have jobs that need to be out by Wednesday.

Can anyone point me at a site or supplier that stocks these things in the UK?

Dave