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  • Big Rich posted an update in the group Group logo of Q/A & Help GroupQ/A & Help Group 9 years, 9 months ago

    Does anyone have some advice for repairing a broken hip ball joint? It’s for the 1/100 Dynames, the ball joint broke off in the leg. The plan atm is to drill it out and put in a new plastic rod to support it.

    • that would be ok but time consuming. Try putting a very strong adhecive which is consist of mixing adhesive A & B. Make sure to apply in between the broken parts.Just make sure to align it properly and rest it for 3-4 days.
      After application adn curing of the super strong adhevise you can sand down the excess parts of the adhesive and paint it again.

      Hope this help

      • IF I can’t pry out the ball from the leg I will give that a go. Thanks for your help. I suppose that would be better than supergluing it and I can repair the broken binders at the same time. This really is a fragile kit.

    • I would use a type of cement like, my favorite is Tamiya thin cement. Here is what it says about using cements This is the main type of glue used to construct plastic (styrene) models. Polystyrene cement is actually a solvent that dissolves a thin layer of the plastic model and fuses it to the adjacent piece. You actually get a weld rather than a glued joint. When used on plastic models, apply sparingly as too much will warp and melt the plastic. These cements set up in less than 1 minute and fully cure in 8 hours.

      • I tried it. It’s not a clean break and once the leg is attached it put must stress on the glue and it breaks again.
        Thanks for the help anyway mate. I’m going to give Johnnel’s suggestion a go tomorrow other wise i’m screwed.

    • your original plan is correct, though you’d probably want to use a metal rod not plastic for strength. What you want to do is get the ball out of the joint glue it back into place, sand it down to fit properly again, then drill down the center of that and place your rod into this, make sure it’s flush and after that you may need to sand again.

      Cements btw couldn’t work by their very nature they weaken the plastic as they melt the plastic to fuse the pieces together.

      Adhesives even strong ones probably wouldn’t do the trick by themselves either but if you do try it hopefully it will be enough for your situation, but I’d go all the way and use the rod to be safer. In other words combine Johnnel’s method with your original instinct.

      • Thanks Steven. I’m going to buy some 2 part expoy tomorrow, it’s only a £1.
        Step 1, get the ball out of the socket.
        Step 2, connect it back to the hip.
        Step 3, cry because step 2 didn’t work.
        Step 4, see what I can do about a metal rod replacing the ball joint. I’ll loose articulation, but it will fix the model. It’s a 00 kit and they’re not know for their balance so this might improve matters.
        All other advice welcome.

    • Id leave the ball in there and use a piece of wire to join the two pieces up again i.e. drill into the ball and into the broken peg, insert a piece of wire and then carefully glue. You should end up with a strong join and if you glue carefully, you wont lose articulation

      • Thanks you Tristan. Instead of wire I went with plastic cut off a spare runner, because I don’t have any wire. I’ve cemented the piece of plastic into a hole I made in the… Piece of plastic the ball joint snapped off, where you’d put the wire.
        I just now have to wait for me to stop being so damn lazy and drill a hole in the ball joint, I tried before but I couldn’t get a grip with the drill.
        Hopefully this will work otherwise I’m going to see if I can cannibalize something off a 1/100 HG.
        Thanks again for your advise my friend.