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Scraper Blade Material

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sparky961:
HSS performs poorly in abraisive conditions. Try drilling concrete with a HSS drill bit and you quickly discover why masonry bits are carbide tipped. Any significant hardening of HSS (which is usually how it's found) makes it too brittle for an application like this.

Maybe you can find a way to mount a bunch if used carbide inserts to the blade, similar to the planer heads that use them. But this doesn't solve the issue of brittleness either.

MetalMagus:
Why not just hire a floor scabbler. Designed for the job.



Will be quicker in the long run, just not as much fun as coming up with a MacGyver version.

Regards

Sean

fatal-exception:
Some good ideas in here. Thanks all.

Not really interested in something that I have to source from some other machine, or I will have to do it for the next x number of years. I've been though this with many other devices I have designed for our company. I would rather just get the right material (from a steel supplier), get it machined and heat treated. The 'Easy' button so to speak. If this were for myself, it would be a different story. i would probably try the leaf spring idea, and it would probably work well for me as the operator.

My steel rep was at the paint shop this week and suggested 400f, which I had not heard of. It's basically AR400 that's heat treated all the way through and tempered back to 40RC. I also didn't know that AR400 was just surface hardened...learn something new every once in awhile. So I got him making a few 'samples' for our trial.  :headbang:

That scabbler is pretty neat. Unfortunately it would take them a year to do this floor with something like that. Maybe for preventative maintenance in the future.

I'll let you know how the 400f plate works out. Maybe get a video of the scraping in action.

Thanks again.
Paul

sparky961:
I also learned something. I wasn't aware of the different flavours of AR400.

Update us when you've had a chance to try it out.

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