Thanks Mcgyver.
As I mentioned in Post #5, it is a little lighter than the Biax and as a result jars your arm a bit easier if it catches anything - even gently. The slide for the blade is nowhere near as solid as the Biax ones and as a result it isn't as easy to position accurately. The blade sort of wobbles a bit, maybe 20 thou or so in all directions.
The guide has also worn a bit since I made it 3 years ago. I doubt that a Biax would wear much in decades.
Lastly, unlike Mike (holescreek) and Stuart (Stustoys), I didn't make the stroke adjustable. I initially set it to about 12mm which was way too long and then modified it to about 4mm which is fine for spotting but a bit tedious for roughing. I had intended to make another one - and maybe will one day, unless a Biax comes along - and have the second one set at 8mm stroke.
If I ever wear the thing out, I'll probably follow the example of Mike or Stuart (who made his externally adjustable!) and make an adjustable one.
Anyway, I love power scrapers of all kinds just because you can do so much work so quickly. I still use hand scrapers for spotting and for scraping against steps or into dovetails of course.
The current project is a 1940s Cash horizontal mill made in Melbourne Australia, the last one was a Brown and Sharpe No2L surface grinder from about 1935. Before that I scraped a CC tool and Cutter grinder (probably from the 30s) and the next project is a Van Norman No2 cylindrical grinder from 1925....
So much scraping, so little time
If anyone ever comes across a 'dead' Biax, PLEASE let me know - even an old one with stripped gears or a burnt out motor! I think that's the only kind I can afford...
Cheers,
Joe