May 2017 Meeting
The May meeting of the 2016/2017 year was held on Thurs. 11th May in the Craobh Eo Centre (Old Schoolhouse) in Aghamore.
Our demonstrator for May was Michael Horkan who turned a sphere and a spherical box.
TURN A SQUARE SECTION OF WOOD TO A CYLINDER.
MEASURE THE DIAMETER OF THE CYLINDER AND THIS WILL DETERMINE THE LENGTH OF THE CYLINDER. WHEN MARKING THE LENGTH OF THE CYLINDER ALLOW 2/3 MM AT EITHER END FOR THE STEBS
NEXT YOU MARK THE CENTRELINE OF THE CYLINDER. THIS WILL ALSO BE THE CENTRELINE FOR THE SPHERE. WHEN THE CENTRELINE IS MARKED MEASURE OUT 10MM FROM THE CL AND MARK THIS POINT.
AS IT IS A 20MM STEB DRIVE THAT IS BEING USED YOU MEASURE THE DISTANCE FROM THE OUTSIDE OF THE STEB DRIVE TO THE EDGE OF THE CYLINDER ALONG THE END GRAIN AND DIVIDE THIS DISTANCE INTO 4 EQUAL PARTS
FROM THE 10 MM LINE ON THE SURFACE OF THE CYLINDER YOU TURN DOWN A STRAIGHT/FLAT SURFACE TO THE FIRST POINT MARKED ON THE ENDGRAIN.
ON THIS NEW SURFACE DIVIDE IT IN TWO AND FROM THIS NEW POINT TURN DOWN A FLAT SURFACE TO THE SECOND POINT ON THE ENDGRAIN.
ONCE AGAIN DIVIDE THIS NEW SURFACE IN TWO AND TURN A FLAT SURFACE TO THE THIRD POINT ON THE ENDGRAIN AND REPEAT FOR FOURTH SURFACE.
WHEN COMPLETE FOR BOTH SIDES OF THE CYLINDER YOU SET A DIVIDERS TO THE RADIUS OF THE CYLINDER AND ALONG THE CENTRELINE YOU STEP OUT 3 TIMES FROM A SELECTED POINT. MARK THIS POINT. STARTING AGAIN FROM THE ORIGINAL SELECTED POINT STEP OUT 3 TIMES IN THE OPPOSITE DIRECTION. IF THE TWO POINTS DO NOT MEET DIVIDE THE DIFFERENCE IN TWO. THIS WILL GIVETWO POINTS OPPOSITE EACH OTHER ON THE CENTRELINE.
REMOUNT THE PIECE ON THE LATHE USING THESE NEW POINTS AND USING A PARTING CHISEL CUT INTO THE PIECE . THIS WILL LEAVE A TRACK ON THE WOOD AND A GUIDELINE AS TO HOW MUCH MORE WASTE HAS TO BE REMOVED TO GET A CYLINDER.
REMOUNT THE PIECE IN ITS ORIGINAL POSITION AND USING ASPINDLE GOUGE REMOVE THE EXCESS WASTE TO LEAVE A PERFECT SPHERE
May’s competition was an inside/outside piece. This was a difficult enough piece to turn and thanks to those who submitted their piece.
June’s competition will be a decorated sphere.
Result for March.
Winner Padraig Grealish
Second Richie Barrett
Third Liam Horan