Progress on the A702 Tailbone Bushings w/pics

[Pb57]

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Made some progress on the Aermotor A702 gearbox tailbone bushings. I set the gearbox up in the mill and bored the 2 holes concentric then made 2 bushings on the lathe. I decided on using steel bushings. I will make a new tailbone pin soon.
I hope you folks don't mind me documenting the rebuilding process here.
Thanks Paul

[Windcatcher530 Dan]

Paul very nice job.!!!

[JBarker]

very nice job, keep us informed. do you have any of the pics set up in your mill? maybe explain your process a little more if able to help us all in the future. thanks

Jerry

[windybob]

That looks really nice. One thing to remember. Most clearances on windmills more, rather than less. You don't want a little rust, or hot weather to swell and bind things, and cold also. Bearings are a litle different, but tailpins, and slides, and and pass-thru pins and items like these should be relatively loose.

Any machine that you don't need to blue the gears on, is worth a bit of play. It's not the Mona Lisa.

[Pb57]

I should have taken pics of the setup on the mill.I will in the future. It was nothing to write home about but I took it slow and it worked. The bottom of the gear box has a rectangle protrusion that I clamped in my vise. I have a Kurt Sidewinder vise as well that really comes in handy at times. I used this specialty vise to clamp onto the end of the nose on the gearbox. It was fairly rigid and worked. I centered it as best I could and made a single pass, boring both holes so they were concentric. Paul

[mtblah]

Great job , simple fix , good learning experience .
You may want to consider adding a grease zerk to each bearing for a really long term fix . a shot of grease every 5 years on the tail pin will make it last thru the next caretaker takes over !