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It's not pretty. I've sheared teeth on racks when using them for Z-axis (up/down) stages that had a fair bit of weight on them. It broke the pinions too : ( To be fair though, it was bad design on my part to use a rack and pinion for that. I should (...) (23 years ago, 26-Jan-02, to lugnet.technic)
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| | compact designs
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Hi everyone! I need a few hint'n'tips, I was hoping you could help me with. 1) How to gear down a 9V motor, on the smallest amount of space, which includes a wormscrew and the engine itself in the smallest possible way. 2) Extenders, which are (...) (23 years ago, 26-Jan-02, to lugnet.technic)
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| | Re: Gear and Axle Strength (was Re: Power Pullin' With My Tractor)
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(...) Has anyone tried making an axle of 2x2 round bricks with bearings made from 1x4 arch bricks? I just played with it a little and it looks like the bearing would work ok. You could also make a bearing from macaroni bricks, but I think it would (...) (23 years ago, 26-Jan-02, to lugnet.trains, lugnet.technic)
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| | Gear and Axle Strength (was Re: Power Pullin' With My Tractor)
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(...) That sounds like a very good solution. My solution to preventing axle shear has been to create multiple shear planes (like the hinges of the boom on my crawler crane). The problem is that it takes up a lot of room and there can be a lot of (...) (23 years ago, 25-Jan-02, to lugnet.trains, lugnet.technic)
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| | Got my set of 6 Va's from S@H today
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Quite interesting, but isn't the brain-thingy supposed to stay in the back-pack and not fall out? Huw (23 years ago, 25-Jan-02, to lugnet.technic.bionicle)
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| | New element in new Biolicle Va sets?
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Well, it's new to me, a friction version of the 'technic axle pin', 3749, in black. (URL) this appeared anywhere else? It looks like it could be useful... Huw (23 years ago, 25-Jan-02, to lugnet.technic)
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| | Re: Power Pullin' With My Tractor
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In lugnet.technic, Thomas Avery writes: Thanks for the update! (...) Long long ago, when I first got into the hobby, I was corresponding with John Gerlach about lift bridges and he reported axle failures, but it was due to shear rather than torque. (...) (23 years ago, 25-Jan-02, to lugnet.technic, lugnet.trains)
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| | Re: Power Pullin' With My Tractor
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(...) Thanks! Okay, try it again: (URL) added some pictures to the "breakage" section that show the broken gears. I'm pretty sure that they break from the axle hole outwards. There's a high stress concentration at the point of axle connection. I've (...) (23 years ago, 25-Jan-02, to lugnet.technic)
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| | Re: Power Pullin' With My Tractor
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(...) Wow, very informative page! Can you add to it what KIND of breakage you saw? (the failure mode) Was it tooth shearing, axle connection point failure, the axle itself failing, or something else? Thanks! (23 years ago, 25-Jan-02, to lugnet.technic)
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| | Re: Power Pullin' With My Tractor
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(...) I might have, but I knew that my wife would've killed me. I contemplated using one of my fattest cats, but I knew he wouldn't sit still and I have enough cat hair on my desk already :-) (...) Thanks for asking. You've prompted me to update my (...) (23 years ago, 25-Jan-02, to lugnet.technic)
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| | Re: Power Pullin' With My Tractor
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Wow, now that's impressive. Surprised you didn't use the kitchen sink. I didn't see it on the list. I was wondering, would you do something for me. A while ago a co-worker asked me about engineering specs of Lego. It sparked an interest but I don't (...) (23 years ago, 25-Jan-02, to lugnet.technic)
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| | Re: Power Pullin' With My Tractor
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(...) Thanks! (...) Give it a try! Steve Lane needs more competition for his pulling contest. No one has beaten his 4.5 kg pull yet. TJ (23 years ago, 25-Jan-02, to lugnet.technic)
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| | Re: Power Pullin' With My Tractor
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(...) Thanks! Actually, I found the problem when I was messing around with it this evening. I didn't break a gear last night, but I mashed some teeth so that the gears wouldn't mesh anymore. That's interesting because it's never happened to me (...) (23 years ago, 25-Jan-02, to lugnet.technic)
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| | Re: Good Tidings
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Mother and baby are well? Hope to see pictures soon! Congratulations! :) Tanya (...) (23 years ago, 25-Jan-02, to lugnet.general, lugnet.loc.us.ny.bin, lugnet.org.us.lucny, lugnet.people, lugnet.technic.bionicle)
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| | Re: Good Tidings
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(...) Wonderful news! Congratulations! Maggie C. (23 years ago, 25-Jan-02, to lugnet.general, lugnet.loc.us.ny.bin, lugnet.org.us.lucny, lugnet.people, lugnet.technic.bionicle)
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| | Re: Power Pullin' With My Tractor
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(...) Thomas, I wish you would fix it and bring it to the next meeting! I would love to see it in person! Awesome, just awesome!! Great acheivement... Tom (23 years ago, 24-Jan-02, to lugnet.technic)
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| | Re: Power Pullin' With My Tractor
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Hello Thomas "Thomas Avery" <thomas.avery@intec-hou.com> schreef in bericht news:GqGH48.H6v@lugnet.com... (...) Quite impressive! I definitly must try to figure out how much my little tractor would lift from the ground...( your 2.9 kg) I think it (...) (23 years ago, 24-Jan-02, to lugnet.technic)
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| | Power Pullin' With My Tractor
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I had a little fun last night: (URL) managed to move 94.5 lb (42.9 kg)! TJ (23 years ago, 24-Jan-02, to lugnet.technic)
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| | Re: Good Tidings
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(...) Congrats to the whole family. George (23 years ago, 24-Jan-02, to lugnet.general, lugnet.loc.us.ny.bin, lugnet.org.us.lucny, lugnet.people, lugnet.technic.bionicle)
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| | Re: Bohrok 'skull' is nifty
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(...) Apparently Bohrok are fans of Karate Kid: (an animated .gif) (URL) (23 years ago, 23-Jan-02, to lugnet.technic.bionicle)
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