Thread: Multi centre / eccentric chuck

You havent mentioned the item size you are trying to turn.
eg for pendants there are other options such as the Joyner Pendant chuck (though not sure these are being sold in Australia anymore)

Axminster also do an eccentric chuck - which i believe is also still sold by Craft Supplies (USA)
http://www.axminster.co.uk/axminster...iralling-chuck
http://www.axminster.co.uk/media/dow...093_manual.pdf

I have seen Guilio Marcolongo turn both boxes and pepper mills on the Vermec chuck. Given its screw chuck mount for timber - some of this was done using jam chucks held on that screw. You can also rotating the object position on the jam chuck itself or rotate the entire chuck itself in the jaws of the scroll chuck.

As for the Sorby chuck there is a manual on Sorbys website http://www.robert-sorby.co.uk/pdf/RS60.PDF
Also see the projects book http://www.robert-sorby.co.uk/pdf/ec...ckprojects.pdf
The adjustment is 0-35 mm - and 5 mm steps are marked within that range. (though settings in between could also be used there is just not a fixed mark currently in place (though the steel could readily be marked with such submarks)

As to the Vicmarc - i havent used it - but its probably worth looking at its manual - if you havent already - to see its options and how it grips timber.
http://www.vicmarc.com/downloads/Vic...n%20Manual.pdf


The method of adjustments vary with the chucks and as do the methods in which the timber is held mounted to the chuck.

Originally Posted by mjl09

the Joyner Pendant chuck (though not sure these are being sold in Australia anymore)

No longer sold here but available direct from Ruth Niles who gives great and efficient service. I got the upgrade plate and a better morse taper direct from her last year and no problems with ordering and shipment to me.

Originally Posted by Oldgreybeard

The Vermec is limited as it does not have eccentric capability - only multi centre.

Bob.

Bob, if you are interested to have a play with both of them let me know as I have the Joyner and the Vermec chucks.


Peter.

There is also one listed on keltons site http://www.kelton.co.nz/Kelton%20Ecc...Faceplate.html

When I had a go at the flat lattice I just used a piece of maple/meranti on my screw Centre face plate and friction chucked/jam chucked it.
It needs accurate turning,
The down side is if your doing lots of different centres you will have lots of timber discs pile up.

The Richard Joyner mandrel is really great for Pendants, Medallions, Earrings etc etc..and with a little ingenuity you can turn 'lattice' style box lids. WH Kloepping has an Excel Spreadsheet which has almost infinite variations, it can be downloaded for free. There are a number of Youtube Videos on the subject from Ed Davidson, Capt Eddie Castelin, Acolyte Turner and one or two others....Regards....George

Originally Posted by mjl09

There is also one listed on keltons site http://www.kelton.co.nz/Kelton%20Ecc...Faceplate.html

Thanks for the links. I had found some of them,but was expecting some more detailed application notes. But from other comments on the internet, most contributors are equally agreived that not one manufacturer has supplied a comprehensive user guide.

For many turners, especially me, off centre and eccentric turning are new and exciting concepts and the new equipment which is available should make these concepts much easier. But from the internet comments, the lack of decent user manuals has perhaps compounded the issue. From the online user manuals, and it appears that these are all that is available, there is no real explanation of anything more than the basic functions - sure there is a brief 'how to', but no explation as to why, when and in what circumstances one would make such settings and what outcome could be expected from the settings.

When you are paying $500 and more for a piece of equipment, I think we deserve more than a basic set of instructions (usually less than 10 pages and offering an explation on how to do a couple of beginner projects - plus adverts for thier optional extras) and a concluding comment such as experiment and enjoy. One manufacture condensed thier user manual into 2 pages!

It is because of the lack of information from the manufacturers and very few videos on the internet that I am seeking advice through this forum. I would not be expecting the projects which I have in mind to fall outside of the Vicmarc recommended 'safe size' of the 3:1 ratio i.e 50mm diameter x maximum 150mm lenght including mounting spigot - if using thier 52 mm cup chuck.

regards

Bob

Originally Posted by Sturdee

No longer sold here but available direct from Ruth Niles who gives great and efficient service. I got the upgrade plate and a better morse taper direct from her last year and no problems with ordering and shipment to me.



Bob, if you are interested to have a play with both of them let me know as I have the Joyner and the Vermec chucks.


Peter.

Thanks Peter, I would like to take you up on the offer to look at the two chucks. Can you PM me with a date/time that is convenient to you.

Bob

Another small one is the Wobble chuck http://www.robert-sorby.co.uk/wobblechuck.htm

I guess part of the reason for the lack of how tos in the instructions is that the possibilities of what can be accomplished through these type of turnings is really only limited by the imagination - in some cases that may not be what was imagined in the first place. Especially when combinations with other techniques such as inside-out turning are utilised.

Before Richard Joyner came out with his chuck people were suing Corian to make a similar offset chuck using a PSI Bottle Stopper chuck as the mounting unit. First a 3x3x.5 blank of Corian was drilled and tapped to fit on the PSI bottle stopper chuck, then turned round. Removed and drilled and tapped for an offset hole with the same 3/8 threads. For a pendant, turn first with the center hole, then remove and screw back on the PSI chuck and turn the decorations. These did not have the indexing feature nor as many offset holes on the backing plate.


The Penn State bottle stopper chuck.
http://www.pennstateind.com/store/PK-BS1-MJR.html


Penn State also has an offset chuck. Not sure on this one, looks to be a pen makers chuck, but I am sure with a little jury rigging it will do a lot more. http://www.pennstateind.com/store/CSC600.html

Originally Posted by dogcatcher

The Penn State bottle stopper chuck.
http://www.pennstateind.com/store/PK-BS1-MJR.html


Penn State also has an offset chuck. Not sure on this one, looks to be a pen makers chuck, but I am sure with a little jury rigging it will do a lot more. http://www.pennstateind.com/store/CSC600.html

When I was looking for a pendant chuck I looked at both of the ones from PSI but both of the chucks have a thread of 1*8 TPI which is not very common on Australian lathes. Hence I went for the Richard Joyner chuck which uses a MT and the latest version, in addition to the pendant, also has a bottle stopper attachment.

Peter.

Originally Posted by dogcatcher

Penn State also has an offset chuck. Not sure on this one, looks to be a pen makers chuck, but I am sure with a little jury rigging it will do a lot more. http://www.pennstateind.com/store/CSC600.html

The same type of offset chuck is available in Australia from McJings in either 1“x8tpi or 1“x10tpi
https://mcjing.com.au/categorybrowse...CENTRECHUCKSET

Which for most of us means an adapter is also needed to use either the chuck or multiport adapter
https://mcjing.com.au/categorybrowse...64#CHUCKINSERT

Then in terms of the chuck itself you still need eg a faceplate (or chuck - but thats likely a lot of unbalanced weight ) to mount to the screwthread on the frontface of the chuck to hold onto the timber itself.
https://mcjing.com.au/categorybrowse...d=63#FACEPLATE

mjl09, thank you for all the trouble you have gone to in finding all these lnks - it is greatly appreciated.

I should apologise for my last post to you in that I did not finish the last sentence
The last sentence should have read:
"if using their 52mm cup chuck turning of pieces with a diameter of 140mm and a maximum length of 220mm are possible - depending on the amount of offset and eccentricity."

At this point I am thinking that I should bite the bullet and go with the Vicmarc Escoulen #3. I will wait until CWS return from thier Christmas break and then go down and talk to Jim about the various options that I should include e.g do I need the threaded ball and adapter or not?

Thanks to all who have contributed thier knowledge and assistance.

Bob

Can't find the subscibe button but I like the subject and will be back

Just to give an idea of the size of the few things.
Vicmarc 120 and a Teknatool supernova2 for size comparison in the background. The PSI type chuck is shown with both of its chucks fitted with lathe thread adapters (in this case to suit M30x3.5 from the original 1 inch ' x 10TPI of the chucks) and also shown together with a 3 inch faceplate to suit the chuck (neither the adapters or the faceplate were included in the price of the chuck). Back side of the Joyner chuck is being shown at the moment as timber is still double sided taped to the front of it.
IMG_6896_S.jpg