Its funny how people find content producers on KZfaq. I watched this video when it came out because I was considering making a power scraper at the time. I saw a couple of your videos after this but wasn't subscribed to your channel. I ended up rediscovering your channel about a year ago and have sub'd and watch your new and old video's religiously ever since. Keep producing great content Mark and I can't wait to see what you do next.

Machines like this aren't made today. Made back in time when quality and function was at its peak. Finding one of these would be a challenge.

Great machine, that motor was made just 2 miles from where I grew up and my mum still lives in the year of the queens silver jubilee, thanks for the video and the trip down memory lane 🙂

Thanks for the video! Nice to see another power scraper design, and its use.

I finally got a 26" cast iron prism so I will finally be able to get my H618 surface grinder repaired. I've been looking on eBay for the last 2 years for an affordable small camelback or a prism or even a triangular straight edge but all of them I've seen were wickedly expensive. I finally bought a raw 26" Foster Featherweight prism and I'm going to machine and scrape it myself. People think refurbishing used equipment is a good way to save money, right up until they realize they need a surface plate, scraping tools, precision flats and all of the other metrology gear required to make things flat and true. In my case, my prize bargains, the $200 Boyer Schultz surface grinder and my new $300 Clausing 5914 lathe, only needed $1000 worth of gear to get started with the refurb project. Now if I can just find a deal on a tub of elbow grease, lol.

VERY NICE ! made back when ya put quality into your work and built to last I needed a die grinder just out of high school and couldnt find a new one ,let alone afford one,...I ran across an old Sioux die grinder from the 50's early 60's thick aluminum housing and every wearable part able to be replaced easily I replaced the cord put in new brushes cleaned the heck outa the switch, and found an assortment of NOS collets, that was in 1983 she still ports and polishes automotive heads like she was brand new good job , keeping the old ones working Mike

I had been dreaming of building something just like this ... with the stationary motor. Thanks for sharing. Amazing what is out there.

VERY interesting! Thank you for the education. Cheers.

I love it. I’m just in the process of modifying a Sawzall. Need to get myself one of those PPI/radius gages.

Nice old solid machine! Good old British manufacture, made about 5 miles from where I live. I'd love to find one of them at a car boot sale!

Thanks for the video! I do scraping as a side job for a few year now (got an old Biax actually), i've seen pretty much anything on the market, but this thing, with the grinding wheel and the massive body looks extremely cool! Gotta love the old-timey stuff :) p.s. I think the idea of a separate motor stems from the industry's "conservatism" rather than shortage of alternatives. You could get any handheld power tool back then, but remember, as resent as at the 50's most big factory machines were still driven by a line motor, so this "big stationary unit to drive an appliance" paradigm was very much the norm for industrial equipment.

G’Day, I’ve not had the pleasure of using either type, just a hand scraper but if I was in the market for a machine job I’d be looking for a Coburn. Great looking machine, thank you, Regards Dave

You know what they say, a sparrow in the hand is better than a pheasant on the roof.

Hello, how did you blue the feet? Is there some way to do it without a large enough surface plate or straight edge that spans the feet? Thank you.

at 1:40 ... from the side view it appears the scraper was meant to also be used 'backwards' and I am going to assume from a design standpoint that is why the 'front' handle is angled the way it is. It's the angled recessing for the blade carrier that is symmetrical that makes me believe this.

I think Colborn made another power scraper that had a sweeping arc action instead of the reciprocating action

Here is what I would do with that tool I would put 18 volt motor on it from cordless drill or die grinder or a router motor because it has variable speed dial on motor. It is a fun old school tool that works for you keep it.

It looks a lot smoother than a Biax, but I think a lot comes down to how well the blade is sharpened, what kind of cast iron you're scraping, how good the DIY scraping blades are....

nice

Damn. Its eating metal. Giving up on my doggy built.

I wonder if that motor is the right RPM? The scraping you show looks too heavy (I'm NO expert, I'm trying to learn). How can you get points of bearing? It looks like it cuts deep channels across the surface with no original surface between them.

Hey man he didn't have a second one lying around did he?

Internet tough guy here. This lacked scientific rigor. Would be nice to see how similar parts would have faired in just the caustic, but without baking. Thanks for the video though (seriously)!

I think that machine scraper is good after use but with hand tools you always have that feel there what it is doing high spots etc with machine it is harder

nice