08/10/00<BR><BR><BR>

Today I mounted the greatwheel in a "box" cut into wood mounted on the faceplate of the ancient 10" South Bend.  (This lathe has been "rid hard and put away wet" too many times, as the cowboys say!)<BR><BR>

I trued the hole in the greatwheel center and then trepanned a groove in the greatwheel into which will eventually be soldered a piece of 2.5" tubing.  This will act as the mainspring barrel. The hole was trued with an ordinary boring bar bit.<BR><BR>


The trepanning tool was made from a boring bar bit.  It was ground to 1/16" wide, with clearance angles on either side to clear both the inside and outside groove edges.<BR><BR>


Then I made a Deltacad wheel spoke template, which is glued on the greatwheel, in preparation for crossing out the spokes.  It's easier to cross out before any further work on the wheel.<BR><BR>


The template was guided exactly into place using a 1/4" brass plug inserted into the greatwheel center hole.  This plug has a pin mounted in a through hole to guide the template onto the wheel surface. <BR><BR>


Also today, there is a picture of my homemade aluminum wheel cutting fixture. This fixture is notable because it has a screw which limits the endshake of the arbor on which the wheel is mounted.<BR><BR>
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Today's links:<BR><BR>

<A href = "P810_truing_greatwheel_hole.jpg" target = "right">Truing the greatwheel hole</a><br>
<A href = "P810_trepanning_greatwheel.jpg" target = "right">Trepanning the greatwheel</a><br>
<A href = "P810_trepanning_tool.jpg" target = "right">Trepanning tool</a><br>
<A href = "P810_greatwheel.jpg" target = "right">Greatwheel</a><br>
<A href = "P810_spike.jpg" target = "right">Spike for positionting spoke template.</a><br>
<A href = "P810_wheel_and_spike.jpg" target = "right">Wheel and spike</a><BR>
<A href = "P810_spike_and_spokes.jpg" target = "right">Spike and spokes</a><BR>
<A href = "P810_fixture.jpg" target = "right">Wheel cutting fixture</a><br>