This weekend has been three steps forward and two steps back. The fist thing I did was to make the large standard that will eventually hold the large gear. I squared up a blank and then drilled and tapped the mounting feet.
The part was flipped on it’s side and the bearing hole and the gear mounting holes were drilled. I deviated from the plans here. The plans call for 3-48 fasteners on the gear. I couldn’t find any so I am substituting 2-56 and drilled the holes accordingly.
The next change I made was to the shape. I liked what Arnold did on his so I roughly emulated his shape. First I notched the top in preparation for rounding over.
Then I milled down the sides close to the marked out dimensions.
The last bit of machining was to facet the top in preparation for rounding on the belt sander.
Then it was over to the belt sander to take the edges to the lines and round over the top. Here is a family shot taken after sanding.
Next up was to make the bearings. I turned the bronze to size and parted off two bearings.
I pressed the bearings into the standards. When the loctite cured I drilled and reamed the holes in the bearings.
That’s where I ran into problems. Somewhere along the way the drill drifted and I was left with this.
I pressed out the failed bearings and next week I will try again.
Till next time.
Tony
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