 |
The three pads of Teflon are nailed down with finishing
nails. The finishing nails are driven down below the Teflon surface
slightly. The Teflon pads are on the bottom so that dirt that might
collect will fall away from the bearing surface. The taffy colored disk is
an antique computer hard disk. In place of this disk you can use plywood
that is laminated to Formica. This is available at Home Depot. I greased
the pads with a bit of silicon grease. The farther the pads are from the
center bolt the greater the friction. The friction of the altitude and the
azimuth bearing should be about equal. |