Dye penetration crack finder kit

[Gritineye]

Anyone tried this kit? Found plenty of dearer kits but should I pay more or are they all the same?

http://weldingsuperstore.co.uk/tig-welding/parweld-ndt-kit-system-wr7040.html

 

[500e]

http://www.aircraftspruce.com/catalog/topages/magnaflux.php
This is one we use price is different though, this was hardly visible just a slight hint by the bolt hole the gloop showed about 1\2inch but when paint removed

 

[Richard.]

I tend not to bother bother buying kits as you'll find you use them at different rates.
I use acetone on a rag (never spray directly on the job as you'll wash the penetrant out) so I don't waste money on the cleaner.
And I tend to find I go through a lot more developer then penetrant.
Spot check is the brand I've tended to stick with.

 

[gordon stephenson]

Wedg1e is the man for advice re: NDT. Dye pen or otherwise.

 

[hotrodder]

On the off chance you've not already read it http://www.mig-welding.co.uk/wiki/Dye_Penetrant touches on the different types and sensitivities . Can't remember ever seening a sensitivity class mentioned for various different visible dyes commonly sold (they're all gonna be at the lower end of the scale), water washable usually costs a chunk more though.
Both the LWS only keep Weldability Flawtek on the shelf. It's cheap (similar price to the Parweld, ~£4ish per tin) it works well enough to highlight flaws invisible to the naked eye and like Richard i don't bother with their cleaner. Various solvents like acetone etc will remove excess dye and it's not like you can spray the 'proper' cleaner directly on the job anyway. Buy some disposible gloves as the dye will stain everything in the vicinity and gets everywhere even if you carefully spray a little into a container and apply it with a small paintbrush

 

[Gritineye]

Thanks for the info chaps, the reason for me asking is that I had a bit of a shock when I took the clutch of my old Chevy apart and saw this flywheel made of unobtainium!

Further investigation since I asked and after a good clean up leads me to think it isn't a real problem

It appears that instead of turning the flywheel surfaces on a lathe it must have been done in one go with four cutters, maybe in a bloody big mill. There are four distinct cutter stop lines at right angles to each other on different surfaces. It looks like it was Friday and the operator pulled out before the operation was finished and the cutter hadn't completed it's final pass....

Reckon I'll clean it up n the lathe and job done..

 

[sardine]

I've got 4 cans of dye penetrant I want to get rid of. Anyone interested ?