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In lugnet.technic, Thomas Avery writes:
Thanks for the update!
> The axles hold up during gear failure. I've never noticed any permanent
> warping either. At least there's no noticeable warping.
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.
He had a (lift) bridge so heavy that a single axle at the axis of rotation
could not take the weight, it kept shearing. He used a technique involving a
gear! Rather than the bridge having an axle pivot, the truss was pinned to a
gear and that gear rolled in a number of 8t gears on the abutment that
together, kept it confined around an axis of rotation as it moved.
I copied .trains so he can correct me if I misremembered.
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![](/news/x.gif) | | 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 (...) (22 years ago, 25-Jan-02, to lugnet.technic)
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29 Messages in This Thread: ![Power Pullin' With My Tractor -Thomas Avery (24-Jan-02 to lugnet.technic)](/news/x.gif) ![](/news/246.gif) ![Re: Power Pullin' With My Tractor -Maico Arts (24-Jan-02 to lugnet.technic)](/news/x.gif) ![](/news/46.gif) ![Re: Power Pullin' With My Tractor -Thomas Avery (25-Jan-02 to lugnet.technic)](/news/x.gif)
![](/news/x.gif) ![](/news/268.gif) ![Re: Power Pullin' With My Tractor -Tom Reed (24-Jan-02 to lugnet.technic)](/news/x.gif) ![](/news/46.gif) ![Re: Power Pullin' With My Tractor -Thomas Avery (25-Jan-02 to lugnet.technic)](/news/x.gif)
![](/news/x.gif) ![](/news/268.gif) ![Re: Power Pullin' With My Tractor -Mark Neumann (25-Jan-02 to lugnet.technic)](/news/x.gif) ![](/news/46.gif) ![Re: Power Pullin' With My Tractor -Thomas Avery (25-Jan-02 to lugnet.technic)](/news/x.gif) ![](/news/46.gif) ![Re: Power Pullin' With My Tractor -Larry Pieniazek (25-Jan-02 to lugnet.technic)](/news/x.gif) ![](/news/46.gif) ![Re: Power Pullin' With My Tractor -Thomas Avery (25-Jan-02 to lugnet.technic)](/news/x.gif) ![](/news/246.gif) ![You are here](/news/here.gif) ![](/news/46.gif) ![Gear and Axle Strength (was Re: Power Pullin' With My Tractor) -Thomas Avery (25-Jan-02 to lugnet.trains, lugnet.technic)](/news/x.gif) ![](/news/46.gif) ![Re: Gear and Axle Strength (was Re: Power Pullin' With My Tractor) -Frank Filz (26-Jan-02 to lugnet.trains, lugnet.technic)](/news/x.gif) ![](/news/46.gif) ![Re: Gear and Axle Strength (was Re: Power Pullin' With My Tractor) -Ross Crawford (28-Jan-02 to lugnet.trains, lugnet.technic)](/news/x.gif) ![](/news/46.gif) ![Re: Gear and Axle Strength (was Re: Power Pullin' With My Tractor) -William R. Ward (28-Jan-02 to lugnet.trains, lugnet.technic)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/x.gif) ![](/news/268.gif) ![Re: Power Pullin' With My Tractor -Jason S. Mantor (26-Jan-02 to lugnet.technic)](/news/x.gif) ![](/news/46.gif) ![Gear and Axle Strength (was Re: Power Pullin' With My Tractor) -Thomas Avery (26-Jan-02 to lugnet.technic)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/x.gif) ![](/news/68.gif) ![Re: Power Pullin' With My Tractor -Gillis Hommen (8-Mar-03 to lugnet.technic)](/news/x.gif) ![](/news/46.gif) ![Re: Power Pullin' With My Tractor -Thomas Avery (8-Mar-03 to lugnet.technic)](/news/x.gif) ![](/news/46.gif) ![Re: Power Pullin' With My Tractor -Gillis Hommen (8-Mar-03 to lugnet.technic)](/news/x.gif) ![](/news/46.gif) ![Re: Power Pullin' With My Tractor -Tobbe Arnesson (10-Mar-03 to lugnet.technic)](/news/x.gif) ![](/news/46.gif) ![Re: Power Pullin' With My Tractor -Gillis Hommen (10-Mar-03 to lugnet.technic)](/news/x.gif) ![](/news/46.gif) ![Re: Power Pullin' With My Tractor -Gillis Hommen (28-Mar-03 to lugnet.technic)](/news/x.gif) ![](/news/46.gif) ![Re: Power Pullin' With My Tractor -Thomas Avery (28-Mar-03 to lugnet.technic)](/news/x.gif) ![](/news/246.gif) ![Re: Power Pullin' With My Tractor -Gillis Hommen (28-Mar-03 to lugnet.technic)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/x.gif) ![](/news/68.gif) ![Re: Power Pullin' With My Tractor -Tobbe Arnesson (28-Mar-03 to lugnet.technic)](/news/x.gif)
![](/news/x.gif) ![](/news/268.gif) ![Some links on tractor pulling -Miguel Agullo (29-Jan-02 to lugnet.technic)](/news/x.gif)
![](/news/x.gif) ![](/news/268.gif) ![Re: Power Pullin' With My Tractor -Steven Arnold (8-Mar-03 to lugnet.technic)](/news/x.gif)
![](/news/x.gif) ![](/news/68.gif) ![Re: Power Pullin' With My Tractor -Jeff McClain (28-Mar-03 to lugnet.technic)](/news/x.gif) ![](/news/46.gif) ![Re: Power Pullin' With My Tractor -Thomas Avery (31-Mar-03 to lugnet.technic)](/news/x.gif)
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