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- #61
After giving it some thought on how to fix this without the Wit's End fix, I test fit an M8 bolt through the hollow post and used heavy washers and a nut to secure it. Once installed on the door it worked great, and felt close enough to stock that I had no concerns about the force required to fold the mirror back. The issue with a solid bolt is that the powered mirror harness routes through the hollow post. I was not going to give up the powered function, so I have to figure out how to still route the harness through there. In the end, I knew that M8 was the largest fastener that would pass through the post without modifications, and that M8 clamp load/strength was way more than sufficient for the compression needed for the spring assembly. I ordered a bunch of different M8 hardware off Amazon and after some fettling about, I arrived at this setup.
Running through the post is an M8x1.0 threaded hollow bolt. Essentially, it is hollow all thread most commonly used in lamps and lighting products. This one is stainless steel, so it is a bit more robust than one used in a common lamp and should be corrosion resistant as well. SS thick M8x1.0 nuts were used on both ends to secure it all.
liberal amounts of red Loctite was used to ensure nothing would back off.
I turned down one of the SS nuts in conical shape to match the taper of the post for a wedge fit. The wedge fit actually provided enough friction to resist rotation when torqueing the top nut, but I chose to epoxy it all in place as an extra measure.
After a trim and deburr, I was left with this. It all fits inside the mirror surround with ease and should hold fast for the life of the rig. The large SS washer you can see here actually bottoms out on the top of the post meaning the spring has slightly less preload that when it was in the un-failed condition. There is still more than enough there to hold the mirror solid at highway speeds.
Running through the post is an M8x1.0 threaded hollow bolt. Essentially, it is hollow all thread most commonly used in lamps and lighting products. This one is stainless steel, so it is a bit more robust than one used in a common lamp and should be corrosion resistant as well. SS thick M8x1.0 nuts were used on both ends to secure it all.
liberal amounts of red Loctite was used to ensure nothing would back off.
I turned down one of the SS nuts in conical shape to match the taper of the post for a wedge fit. The wedge fit actually provided enough friction to resist rotation when torqueing the top nut, but I chose to epoxy it all in place as an extra measure.
After a trim and deburr, I was left with this. It all fits inside the mirror surround with ease and should hold fast for the life of the rig. The large SS washer you can see here actually bottoms out on the top of the post meaning the spring has slightly less preload that when it was in the un-failed condition. There is still more than enough there to hold the mirror solid at highway speeds.
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