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Post by kennedylanduk on Jun 4, 2017 15:38:42 GMT
I've either got to replace my steering blocks/hubs on my outdoor car, or attempt a repair. When searching for "what compound to use" (the blocks for my car come in carbon, V1, V2, V3 and composite, no idea what I've currently got let alone which one to buy), I found some references to HeliCoil thread repair kits. Has anyone any experience of these when used on plastic? The kit is here www.ebay.co.uk/itm/301938408281For a 3mm repair, you drill in 3.1mm and screw the insert in. Then screw the originam M3 screw in.
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Post by Dean on Jun 4, 2017 16:27:02 GMT
I never used one but isn't it alot of hassle when replacing the steering block would be better and easier?
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Post by kennedylanduk on Jun 4, 2017 17:20:53 GMT
I never used one but isn't it alot of hassle when replacing the steering block would be better and easier? Yes, and I'll be doing that anyway. Just curious to know if anyone had used these, it could be a useful addtion to the spares box.
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Post by Dave Chamberlain on Jun 5, 2017 6:19:12 GMT
I've used them at work, but only in aluminium not plastic..
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ianlloyd
Lapping the Back Markers
Posts: 932
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Post by ianlloyd on Jun 5, 2017 13:59:51 GMT
We used them a lot on the old Associated TC3 as they were always stripping. Worked a treat for us, might even have some left somewhere.
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Post by kennedylanduk on Jun 5, 2017 14:34:33 GMT
I've already ordered the kit, so will give it a go very soon. I found on another RC related forum that someone was using them all the time.
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Post by theslacker on Jun 7, 2017 15:28:46 GMT
Ive used them before.... on aluminium mainly but can't see why they wouldn't work in the right composites. The other halfs suspension on her VW has held together the last 2 years with them in!
We used to use them a lot in my previous work with aluminium parts where screws were likely to be undone and done up regularly, Aluminium threads have a tendency to weaken over countless screwing operations (As do composite materials) so inserting a steel helicoil into them solves the problem.
I think from memory when you purchase the helicoils it will for example say something like M6 - 1D the "D" is the depth of thread and the 1 is the ratio of depth to the thread diameter. M6-1D would have a thread depth of 6mm, M6-1.5D would have a thread depth of 9mm and so on and so forth. You can cut the coils down but there tough and you run the risk of ruining your new thread..
Just be weary if you plan to use them on blind holes rather than through holes you will need a flat headed tap as the tapered ones will bottom out before you reach the desired thread depth.
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Post by kennedylanduk on Jun 8, 2017 15:16:47 GMT
The kit arrived today, and I've fitted a couple of these to one of my front hubs as the thread is stripped (I've needed to tighten before each race for the past week). Screwed it back into the car and the joint is really good and tight. Very impressed. Will have to see how it holds out for a race.
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