So grabbed one of those sets of setup blocks made of Chinesium. Red anodized, nice markings, nice case. Cheap.
So, how accurate are they ? Most were +/ .001". A few .0005". The 123 was not that good, but I have "real" 123 blocks that are better than .0005. About half of them differ end to end by .001.
Makes sense that no matter how well they were machined, being anodized will be slightly variable. They have a textured finish. Gauge blocks are so smooth you have to slide them apart.
That means for setup in woodworking they are fine. Just don't think of them as a standard. Gauge blocks of course cost 10 times as much. Really good ones, well don't ask.
I'll see how handy they are. Never used them for machine setup before. Cheap enough to find out.
So, how accurate are they ? Most were +/ .001". A few .0005". The 123 was not that good, but I have "real" 123 blocks that are better than .0005. About half of them differ end to end by .001.
Makes sense that no matter how well they were machined, being anodized will be slightly variable. They have a textured finish. Gauge blocks are so smooth you have to slide them apart.
That means for setup in woodworking they are fine. Just don't think of them as a standard. Gauge blocks of course cost 10 times as much. Really good ones, well don't ask.
I'll see how handy they are. Never used them for machine setup before. Cheap enough to find out.