Blondihacks patreon

Stickers and Thanks!

🕑 Added 2022-05-02 18:05:57 +0000 UTC

Comments

Blondihacks

I wish I could help! All I can suggest is maybe log out and back in, and maybe write to Patreon support (link at the bottom of the page).

Brian

Good content, because I'm learning things! Thoughts on the temperature and mass differentials. The bushing is lower mass and in great surface contact when it is being pressed. So, the only way to maintain the differential is to have the difference coming from the heat reservoir of the large cast iron flywheel. Except, you could press-fit a chunk of dry ice into the bushing, sitting on the anvil of the press and then, with the dry ice in the bushing center, push the flywheel down over the bushing. In this way, you are using the un-sublimated dry ice within the bushing as a thermal sink for the bushing to keep it cold while the flywheel is keeping closer to room temp. You could also put the bushing on top if you had a temporary bottom to keep the dry ice in it like a cup (loctite?).

Andy Pomfret

Glen, can you expand on your heat vs chill argument? I don't see why the absolute temperature of the two parts should make much difference, the flywheel will still try to pull the bushing towards its own temperature, and it will quickly succeed because the thermal mass of the bushing is so small. Seems to me that should be true whether the bushing is "cold" or the flywheel is "hot" - in both cases the flywheel is hotter than the bushing. I could see that maybe having the small part nearer to room temperature might be good for reducing the effect of the air on its temperature, but other than that I'm not sure why it should make any difference, for the same temperature differential. Am I missing something? (Quite likely...)

Andy Pomfret

Very not spam! Anyone who doesn't want to watch can just ignore the notification anyway.

Blondihacks

Well the idea is that the bushing is thick enough to completely contain the keyway so it won’t collapse. That’s the idea anyway. I’ve never done this before but my understanding is this is how one re-bushes a keyed bore.

Peter W. Meek

LOL. I hate them; keep them coming. A point to ponder: When you cut the keyway through those bushings they may collapse, catching the broach (or whatever you use to cut the keyway). They will also have less of a strong fit in the bore. A cylindrical shell is very strong in compression; a 95% arc of a cylindrical shell is pretty springy. A note to Kristina: they "evaporate" after a day, so you have to catch them when they're fresh. (Dunno if that's why you can't get them, but I've missed a few that way.)

Richard Gardiner

"any day with a Quinn video is a good day." Absolutely.

Glen Morehead

"Spamming"? Pff. IMAO any day with a Quinn video is a good day. The more the merrier. On the temperature-differential fitting of the bushing: The bushings are small and thin while the flywheel is (relative to the bushing) humongous, making the flywheel one helluva heat sink. It wouldn't matter how much you chilled those bushings, the flywheel's thermal inertia is going to schlurp out the cold almost immediately. It's like using an anvil to cool a piece of steel more quickly. ("Except backwards", says Captain Obvious.) Your idea of heat-soaking the flywheel and having the bushing at air temperature (or chilled, if you want) is the only way to make that particular differential fitting work. (Wonder how thick the bushing walls would have to be to give them sufficient mass to retain the cold long enough to press/drop in?)

Kristina McKeown

Hey, looks like others are not having this problem...I cannot get the lens videos to play since their update end of April. Have left feedback for patreon twice... Anyone else having this issue? Thanks. Sorry I have missed your content Quinn. Hopefully this will get resolved soon.