4-prong drive with removable centre point.

When using a Sphere Turning, Ring Turning or a Copy Turning device it is an advantage to use a Morse taper Extension Sleeve in order to keep the work away from the headstock.
In Wood Tuning Schools it is popular to use a Ring centre (cone friction drive) in order to teach the correct way to turn by sheer cutting. Use parts (845, 847).

Revolving Centre Multihead

The LIGNO Heavy Duty Rotating Centre consists of a “rotating cup” centre that is carried by a very strong double rowed angular bearing (see below) which is greased for life.  This will give good play free performance when turning.
It has been designed to be used with a range of tool bits that can be quickly and easily changed using a knock out bar.
The Morse Taper guaranties true-running.
All the bits have an MT 3 shaft that fits both in the extension 815 or 816 as well as in the Revolving Centres 8200 or 8205.

For machines with MT-2 in Spindle and tailstock you use Morse Taper Extension Sleeve MT2-MT3 816 and Revolving Centres 8205.

The use of Morse Taper Extension Sleeve 815 or 816 and the large cone 849 will give more room for hand turning, or copy and sphere turning

Optimum chucking of a sphere when using a sphere turner.

The picture shows the Morse Taper Extension Sleeve 815 or 816 with the 4 prong drive 821 and the large cone 849 mounted in Revolving Centre 8200.

Experienced turners may now turn off the tennons with a hand tool until only a few mm´s of material are left. The rest can be ground off.
But especially with bigger diameters it is an advantage turn the work through 90° and re chuck, then saw of most of the tennon.
Smaller spheres can be rechucked directly between the cup centres 850.
For Bigger spheres a piece of wood is mounted on to the cup chucks 850. Turn a concave area in to a piece of wood (the radius  to be the same as the sphere to turn).  Make one for the headstock and one for the tailstock and rechuck the work piece.
Reposition the centre of the sphere turner to the new centre of the sphere and finish the work piece.

The Sketch shows how a lamp foot can be drilled (long hole boring). The four prong driver 821 with the insert 868 (peg nose) works as a counter bore/drive centre and 853 is a rotating pin centre with long pins that allow the wood shavings to drop away before they can reach the revolving centre 8200.
Generally, long holes are bored half way, the work reversed, and the boring completed from the other end.

Precise concentric chucking of a work piece.

Mount a work piece (bowl) to the faceplate 800
Turn the outside of the work piece including the recess or tennon for rechucking.
Using the Thread Centre 852 attach a Chuck to the Rotating Centre 8200.
Move the tailstock (together with the adapter 852, the rotating Centre 8200, and the chuck assembly attached) up to the work piece force it into position.
Remove the faceplate, work piece and chuck from the spindle...
Remove the faceplate from the work piece.
You can now screw the chuck onto the spindle of the headstock and your work piece will be very precisely
concentrically mounted ready for further turning.

The Cup Centre 850 and Mini Face Plate 851 can be used to make and hold homemade wooden supports for bowls and goblets etc.