Thread: Let's talk ER chucks & collets

Ken,

Buying an arbor is the easiest option and one I have pursued myself when my intention was to modify one of my boring heads. The problem still remains in how do you acheive concentricity with two separate components. We are back to the CTC example. Bear in mind, my problem may certainly not be the norm. I would be well interested to find out how other face mill owners have fared.

Bob.

I think Dave can type more proficiently with his thumb than I can with my whole hand, hence him beating me to the draw. He has nailed it, why would you bother. Spend your time more fruitfully making something you can't buy.

Bob.

i was conserned about how it would work out with a arbor i just made for the boring head i bought on greys online.its an iso 30. it has the taper and a flange like part for the mill spindle drive dogs. on either side of the flange. is a small shoulder. the threaded side of the flange is what the cutting head mounts on. the shoulder and taper were cut in one set up. then reversed. carefully set up to run true and the the thread cut. so when the arbour is done up tight. i havnt measured it but it appears to run true. much to my surprise.so with that in mind i could hold the arbor on a shoulder screw on a blank facing cutter and take a light cut. im not shore if that would be possible on my 9"c

Originally Posted by Anorak Bob

Ken,

Buying an arbor is the easiest option and one I have pursued myself when my intention was to modify one of my boring heads. The problem still remains in how do you acheive concentricity with two separate components. We are back to the CTC example. Bear in mind, my problem may certainly not be the norm. I would be well interested to find out how other face mill owners have fared.

Bob.

Got a camera Azz?

i will get one soon. it may help explain what im trying to get across. im not to good at putting it into words.

Originally Posted by Anorak Bob

Got a camera Azz?

AB,

A bit late in the piece, but it's good to see you on that other forum.

With respect to the collets you picked up from Canada, what are the projections on the tail end for?

Could these be cut off, and the collets used in an ER collet chuck? I don't mean to actually cut them up, that would be a no no.

How close are they related to ER collets?

Ken

Originally Posted by Anorak Bob

Got a camera Azz?

this is an arbor i didn't finish because the lathe i was using kept hiccuping, as i started cutting the tread. you can see the shoulder on the short end this is what the boring head mounts on. the tread locks it in position
i will re-post the photos.
thanks for the heads up

Ken,

The nut like projections incorporate the lock screw required to secure the screwed shank of the Clarkson type cutter. The nut enables the collet to be held while tightening the screw. Cutting the nut off would result in the total destruction of the collet since the slots continue into the body of the nut.

Back in the olden days, there were E non - collapsible biconical collets. They had no retention / ejection groove. Rego Fix introduced the ER collet in '72. Schaublin had ES collets that were collapsible like the ER but had no groove. Schaublin now produce ESX collets made to the same DIN standard as the ER.

Whilst a Rego Fix ER 32 collet will fit in the Schaublin nut, it will not be retained in in place. The Schaublin collet will not fit in the Rego Fix nut because of the slightly different position of the retaining ring in the ER nut.

Bob.

Azz,

I don't think your attachments are valid. Might just be me, but I can't open any of them.

I get this message

Invalid Attachment specified. If you followed a valid link, please notify the administrator

Ken