U-Joint for solid shaft

Discussion in 'Sport & Scale Hydro Forum' started by Yves Laberge, Mar 26, 2019.

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  1. Mar 26, 2019 #1

    Yves Laberge

    Yves Laberge

    Yves Laberge

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    i would like to know if u-joint for 3/16 solid shaft are still made for nitro engine (.45) and by ????
     
  2. Mar 26, 2019 #2

    Kez

    Kez

    Kez

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    Yes, Octura still offers them.
     
  3. Mar 26, 2019 #3

    Yves Laberge

    Yves Laberge

    Yves Laberge

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    Thank, but where i can buy Octura products ????
     
  4. Mar 27, 2019 #4

    Roger Lee Hooks Sr

    Roger Lee Hooks Sr

    Roger Lee Hooks Sr

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    Call OCTURA at: (847)674-7351
     
  5. Mar 27, 2019 #5

    Yves Laberge

    Yves Laberge

    Yves Laberge

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    Thanks!
     
  6. Mar 28, 2019 #6

    Jim Allen

    Jim Allen

    Jim Allen

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    I believe it is justified in saying that this manufactured product, of a ball & pin universal, leaves a great deal to be desired! This simple two part mechanical design is a constant velocity joint, which when properly machined, will provide reliable transfer of the engine's torque & the propeller's thrust . All male & female pieces shown are made of AISI-O1 tool steel. All the pieces in the photos are interchangeable, have a total indicator runout of .0005", have full hard bearing surfaces & have very high wear resistance. The male ball ends are precision machined with a form tool or a convex radius tool. The balls & their 1/4'' necks are hardened, then tempered to a spring temper. The full hard M-2 steel drive pins are pressed into the balls with a .001" press fit. The female slotted ends are fully hardened only in the areas where the drive pins ride. I also adapted the ball ends to fit on the engines flywheel of both my gas & nitro engines. The small washers provide a hardened surface for the ball ends to ride against when the propellers thrust is driven up into the engines bearings. A splined set screw (Bristol Screw) with a machined point & a machined cavity in the shafts prevented any failures in these areas.

    Jim Allen
     

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    Last edited: Mar 28, 2019
  7. Mar 29, 2019 #7

    brad nichols

    brad nichols

    brad nichols

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    There is probably little friction in the drive line compared to cable but a lot more parts to fail. It would be quite costly for all the machining and hardening going into the parts

    Brad
     
  8. Mar 29, 2019 #8

    JimAllen

    JimAllen

    JimAllen

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    The Octura stuff is inexpensive enough that if you wear it out, just replace it.. While I appreciate the amount of effort Jim puts into his stuff, it seems like a lot of work for no significant gain over the off the shelf parts. Yeah, his stuff is no doubt dimensionally superior and better materials, but it's not going into low earth orbit, just an RC boat. I would use his talents in the engine building, I think he's going to show more bang for the buck there.
     

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