Part B
Drilled and counter bored
Here I have centre punched the adapter plate and the ER collet chuck. This will be the correct orientation of the two parts.
All of the remaining machining will be done with the collet chuck fitted to the adapter plate.
On the lathe ready for the threading operation
Threading done quick eh! The treading operation can be seen here.
http://www.metalworkingfun.com/showthread.php?tid=320
Now for the taper, so first a 17mm thru hole is drilled.
At this point I marked how far a collet went into a commercially made holder. (Not just a pretty face)
The compound slide is set over to 8 deg.
I cut the taper to about half way now out comes the engineers blue (Prussian Blue) and a collet is carefully inserted into the taper. This what I got
You can see it is mainly touching at the mouth of the taper, ignore the smudge down the side.
It is just a case of adjusting the compound slide angle. Now I put a dial gauge plunger onto the side of the compound table, so I know which way it is moving. And gives a bit of an indication of how much.
After a couple of adjustments seems Ok
It was at this point I decided to shorten the threaded part. Afterwards I carried on cutting the taper to the correct depth.
I think it is best to leave the nose part a little longer than required, just in case the collet does go into far, it can easily be corrected by facing the nose.
And that is about it.
And what are you going to do with it I hear you ask.
Well I can use it on the lathe, then take it (chuck and work piece) to the milling machine, and back again to the lathe without loosing too much accuracy and the need to keep setting it up.
Hope you enjoyed it, as much as I did making it and showing how I made it.
DaveH
Drilled and counter bored
Here I have centre punched the adapter plate and the ER collet chuck. This will be the correct orientation of the two parts.
All of the remaining machining will be done with the collet chuck fitted to the adapter plate.
On the lathe ready for the threading operation
Threading done quick eh! The treading operation can be seen here.
http://www.metalworkingfun.com/showthread.php?tid=320
Now for the taper, so first a 17mm thru hole is drilled.
At this point I marked how far a collet went into a commercially made holder. (Not just a pretty face)
The compound slide is set over to 8 deg.
I cut the taper to about half way now out comes the engineers blue (Prussian Blue) and a collet is carefully inserted into the taper. This what I got
You can see it is mainly touching at the mouth of the taper, ignore the smudge down the side.
It is just a case of adjusting the compound slide angle. Now I put a dial gauge plunger onto the side of the compound table, so I know which way it is moving. And gives a bit of an indication of how much.
After a couple of adjustments seems Ok
It was at this point I decided to shorten the threaded part. Afterwards I carried on cutting the taper to the correct depth.
I think it is best to leave the nose part a little longer than required, just in case the collet does go into far, it can easily be corrected by facing the nose.
And that is about it.
And what are you going to do with it I hear you ask.
Well I can use it on the lathe, then take it (chuck and work piece) to the milling machine, and back again to the lathe without loosing too much accuracy and the need to keep setting it up.
Hope you enjoyed it, as much as I did making it and showing how I made it.
DaveH