Wheel Came Off

Post by: **rgh0** » Sat Aug 29, 2020 10:53 pm

This is what I use on any components under load and liable to crack. You will find it or similar products at most industrial supply stores

https://www.rocol.com/products/flawfinder-kit.

The biggest challenge with the rear hub shafts is you need to have the hubs apart to use it. It is also challenging to get a true indication of a crack at the root of threads but possible.

cheers
Rohan

Post by: **StressCraxx** » Sun Aug 30, 2020 4:41 am

rgh0 wrote:This is what I use on any components under load and liable to crack. You will find it or similar products at most industrial supply stores

https://www.rocol.com/products/flawfinder-kit.

The biggest challenge with the rear hub shafts is you need to have the hubs apart to use it. It is also challenging to get a true indication of a crack at the root of threads but possible.

cheers
Rohan

Dye penetrant as above is a great diy tool if you follow the instructions carefully. It's also easy to cause misinterpretation of the results if you don't follow the directions exactly.

Magnaflux (trade name) is a dye penetrant process that magnetizes the part and then shows possible indications under a UV light. Much smaller defects (indications) can be detected. Most good automotive machine shops can do this for you for a modest cost.

The important part of the threaded portion of the axle is the radiused transition from the threads to the face of the shaft at the taper. The radius helps prevent the formation of stress raisers between the threaded section and the tapered section of the shaft.

Post by: **alan.barker** » Sun Aug 30, 2020 6:05 am

Imho you need a friend in the Aero Space Industry in the QC department who can test and interpret correctly.
It's not a diy job
Alan

Post by: **MartinH** » Mon Aug 31, 2020 8:11 am

: Upright.jpg (68.39 KiB) Viewed 520 times

: upright 2.jpg (61.29 KiB) Viewed 520 times

In the end i took the upright off the car as it is clear I will need to replace it. The underside is ground down into the sleeve that carries the wishbone bolt on one side. It dragged a long way up the motorway as I was doing 130kmh so not really surprising.

Post by: **Bigbaldybloke** » Mon Aug 31, 2020 10:25 am

I’m sure there are people out there with the skills to weld repair that but agree that as replacements are available that’s the way I’d go. I actually expected it to look worse than it is given the speed you were doing, but I guess that’s one of the benefits of a light car.