Instruction/Data Sheet
Page 5
The second project we are going to make in the presentation is a 3-sided bowl with a clover leaf centre.
We will use a bowl blank of approx 5” (125mm) diameter and approx 2 1/2” (62.5mm) thick. Using
a blank of this diameter your lathe will need to have a swing over the bed bars of more than 5 1/2”
(140mm). If it does not, then use a smaller bowl blank.
Mark the centre and screw the faceplate into place using woodscrews.
Place the hexagonal stem of the faceplate into the bi-hexagonal locating socket of the eccentric boss
and tighten the machine screw and washer.
Place the eccentric boss into the main body and set to ‘0’ in sight window.
Tighten the boss screws and place the toolrest at the face of the blank in the “safe toolrest position”
Turn the face of the blank flat.
Place the toolrest at the “safe toolrest position” at the outside of the blank.
Turn the face with a small bowl shape curve on the blank.
Now loosen the boss screws and remove the eccentric boss.
Undo and remove the machine screw and washer and remove the faceplate from eccentric boss.
Unscrew the wood screws and remove the blank from the faceplate.
Turn the blank over so that the face that has just been turned is facing up.
Now using an angle protractor mark 3 ines radiating out at 120 degrees apart and number them
1,2 and 3.
Place the faceplate in the centre of the bowl blank and secure using the woodscrews.
Now fix the faceplate to the eccentric boss using the machine screw and washer.
Place the boss back into the main body.
Three sided bowl with a Cloverleaf centre detail
Robert Sorby
Instruction/Data Sheet
ECCENTRIC CHUCK PROJECTS
