Making MDF type chucks-Johnny Tolly
|This is the steps I go through to make the MDF type chucks. Cut 3 each 3 1/4" squares as bottom left. Next glue 2 together and clamp. Let dry them mark with a center finder and mark a circle on the 2 glued pieces and the 3 rd disk. Also mark a 1/4" disk 3" and cut round on the band saw. Tools that I use are shown. Drill chuck and tap the size for your lathe, clamps, center finder, compass, and pencil. One completed MDF chuck is shown. So lets go through the steps to make the MDF chucks.|
|Here the 1/4" disk in
behind the 2 glued MDF disk. The 1/4" disk spaces the MDF out so the
drill bit will NOT hit the chuck. It also keeps super thin super glue
from getting in the chuck jaws when gluing.
|This picture shows the forstner bit marked for the depth of the 2 MDF disk. Note the red line on the bit. Drill to the premarked depth (shown here as a red line)|
|Remove the Forstner bit. Cut the face true and cut a recess as shown. This recess allows the MDf to seat next to the headstock. Also round the corner down as needed for your lathe. Using the super thin super glue, coat the inside of the hole and recess. Hit with accelerator to cure the glue.|
Mark your tap for the
depth of the 2 MDF disk. Note the red mark on the tap. Place the tap
between the live center and MDF chuck. Place a crescent wrench on the
tap and lay the wrench on the tool rest.
Here are some
examples of vacuum drum chucks. Make the drum chuck to suit your needs.
Self-adhesive close cell foam is used as the sealing means on the drum
chucks. The 2 cone shaped items are formers for the 2 drum chucks on
the left. This is not needed but when not in use keeps the foam shaped
better than without the former. Your call.
|This is a side view of the same drum chucks. Black electrical tape may be used to hole the close cell foam down on the side if needed.|
|This picture shows the
MDF chucks being used to make a lidded box
|This view shows the tail stock adapter in the MDF type chuck, which holds the lid of the box.|
|Here are 3 different
lidded boxes. Left is California Red Wood, Center is Texas Ebony, Right
is an unknown wood I picked up some place. All these boxes are now
ready to finish using the vacuum system.
|Here a few finished lidded boxes. Left is Russian olive wood I received from Ken Anderson Next is Texas Mesquite Then a round box of Butternut and the one on the right is of Texas Ash. All were completed using a vacuum chucking system.|
|These are the different tailstock adapters that I designed. From the left, 1inch X 8 Tpi, 33MM X 3.5 Tpi, 1 &1/4"X 8 Tpi, 1 &1/2" X 8 Tpi. All fit onto the Oneway live center.|