ER32 Collet Chuck for Proxxon PD 400

[DaveH]

Wong,

Let me just say this, to get my ER25 collet chuck on I have to turn it slightly,
but when it is on I cannot turn it 360 degrees, it goes a touch tight. I don't need to turn it 360 degrees, so it really does not matter. Also it always goes on in the same position, this position was set when I made it. So I mount it in the same position as I made it, this gives the "best" accuracy.

And Yep something just ain't quite round


DaveH

[Wongster]

Dave,

:smiley-signs115: I'll take note of the position when I'm onto that.

Regards,
Wong

[doubleboost]

Sound advice from Dave
Make a dummy madrell to fit your spare chuck
Then use it as a test fit
John

[Wongster]

After another hour plus, I'm at 50.03mm...



Should I bring it down further to, say, 45mm before flipping it over? I'll be cleaning up the should at this point.

Surface finish not that nice. Can see some little "pot holes". During cut, I heard rough sound at times and clean shearing sound at certain section. I'll put on the carbide insert tool with radius tip to clean up the surface a little before flipping over. This is just to test if I can get a better finish for later use.



Still can't do a better close up... Will bring out my new camera for a closer shot to show the pot holes.

Time to go work. These days, I dislike having to work on Sunday. Thank God it's only 4 hours this time.

Regards,
Wong

[DaveH]

Wong,

Having to work on Sunday - not so nice

Whilst you have it there you might as well take it down to 45mm, try to get a nice finish (reasonable) because it will be held in the 3 jaw chuck.

You have done a good job

Dave

[Wongster]

Thanks for the encouragement, Dave. I'll go for 45mm.

Regards,
Wong

[dallen]

(05-06-2012, 09:09 AM)Wongster Wrote: Thanks for the encouragement, Dave. I'll go for 45mm.

Regards,
Wong

Wongster; I wonder if you have a location on the file that your using to build this chuck off of, I tried to follow the like you listed at the first of this thread and it doesn't work for some reason. I have a small 7 inch lathe that I would like to make on of these for which would be a heck of a lot better chuck for it then what is on it.

keep turning, the one trick I learned with HSS tools is have em razor sharp, the smaller the lathe the sharper the tooling. anyway thats what works for me. that and slow feed speed.

David.

[EdK]

(05-07-2012, 06:12 PM)dallen Wrote: Wongster; I wonder if you have a location on the file that your using to build this chuck off of, I tried to follow the like you listed at the first of this thread and it doesn't work for some reason. I have a small 7 inch lathe that I would like to make on of these for which would be a heck of a lot better chuck for it then what is on it.

keep turning, the one trick I learned with HSS tools is have em razor sharp, the smaller the lathe the sharper the tooling. anyway thats what works for me. that and slow feed speed.

David.

David,

Try this link.

http://groups.yahoo.com/group/7x12minila...struction/

The file is located there.

Ed

[Wongster]

Hello David,

The link Ed provided is where I got the drawings from. There is another PDF file which might interest you. It shows how the mounting screws can be located:
http://f1.grp.yahoofs.com/v1/8FOoT7s8RAP...ctions.pdf

Its on the same site listed under the name "7X Lathe Spindle Mount Hole Layout Instructions.pdf" if the above link is bad.

And... thanks for the tips!

Regards,
Wong

[dallen]

thanks for the link, got the print in my hand now to find a chunk big enough, maybe I'll pour up some cast iron and make the body from that.