Reply by unbob

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Posted on No 7 vs No 8

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810 posts in 2172 days

#1 posted 03-06-2014 03:48 PM

Thank you Don, I misunderstood.
Some observations on the planes I have.
I bought a set of #7 style planes from an estate #4 to #8. Along with those was a #8 Diamond edge brand.
The #8 Stanley was hardly used at all, it just didn’t work well. Inspecting the plane, the mouth opening protruded beyond the rest of the sole a considerable amount. When the plane was put on a flat surface it would rock toe to heel, pivoting at the mouth. That one had error in the worst spot. The overall sole was more convex with a bit twist.
The Diamond edge plane was used a lot, the iron is about used up. So, that old craftsman used the best plane out of the two. The sole on the DE was more on the concave overall, with the mouth opening slightly sunk in.

Metal is a lot like wood, it has grain direction “s”, built in stress, at times hard and soft areas. Over time, these flaws relieve themselves and cause warp, just like wood does.
I am about half way through working the 18 bench planes I have, various years up to WW2 vintage. The more stable ones seem to be the ones with patent dates, and the WW2 models.
Some that I have scraped continue to drift out, and need to be touched up. For example, the Stanley #8, the mouth opening still drifts out. I have reworked it 3 times over the last year, its stabilizing however.
The worst one so far is the 4square model, a couple of weeks ago, it was flatter then that the dye shows now. probably pulled from the mold too soon causing the hard surface and a lot of internal stress.
On that 4 square, as I was working on it, getting it pretty close to flat. I would test it, then tap on it with a small hammer, to help further relieve the stress, test it again- it would still twist in the same direction it was in.
I just keep working them until they some what stabilize.
The first plane I did was a early patent date 5 1/2 in not so good of shape. But, the 5 1/2 when done, far out performed the #8 planes, so I then did the #8 planes.

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