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Thread: Plane sole flattening, again...
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21st May 2019, 01:15 PM #91Innovations are those useful things that, by dint of chance, manage to survive the stupidity and destructive tendencies inherent in human nature.
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21st May 2019 01:15 PM # ADSGoogle Adsense Advertisement
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22nd May 2019, 12:16 PM #92
My bad, it's a 9 1/4. Since nobody else has any constructive comments, what do you think about this plane as the next subject of my study DW? I've sharpened it and it looks like the sole has been worked with a belt sander. Works okay for remodeling tasks. The paint is dark blue.
?Innovations are those useful things that, by dint of chance, manage to survive the stupidity and destructive tendencies inherent in human nature.
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22nd May 2019, 12:54 PM #93Innovations are those useful things that, by dint of chance, manage to survive the stupidity and destructive tendencies inherent in human nature.
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22nd May 2019, 09:01 PM #94GOLD MEMBER
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Looks like a good candidate. I'd have more comments but the level of flatness and fineness of finish are certainly uncharted territory for me.
The 9 1/4 was probably belt sanded at the factory, and if not then, flattened by a tradesman since. I can't argue with that as a method for carpenter work, but not that great for fine work.
I'd also comment more if I didn't have raging bronchitis. I think I'm on the surface of another planet, and am doing important client work today. Sort of like doing work drunk, except I don't drink.
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22nd May 2019, 09:15 PM #95
Yep, duty calls for me too. Hope you feel better. I don't know how much better the WoodRiver plane will get, each time I think I'm close to being done it improves.
Innovations are those useful things that, by dint of chance, manage to survive the stupidity and destructive tendencies inherent in human nature.
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25th May 2019, 10:25 PM #96
3 micron lapped data.
Had to change my test block, the original was too worn. The variability in the heavier cuts is likely due to the presence of a small knot that I had to work through toward the end.Innovations are those useful things that, by dint of chance, manage to survive the stupidity and destructive tendencies inherent in human nature.
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26th May 2019, 11:23 AM #97
Lapping now with 1 micron compound in an effort to get a shiny surface for the optical flat.
Here's the plane after lapping alongside a lapping block that I use for chisel backs.
Very flat surfaces will 'wring' (stick) to each other. https://en.wikipedia.org/wiki/Gauge_block#Wringing
First the two surfaces are pressed together to expel trapped air.
Plane and block wrung to each other.
And now inverted.
And now with long axes perpendicular.
And now on the side.
It appears that the plane is too soft to take a gloss but the wringing shows that it is now very flat.
<The minimum conditions for wringability are a surface finish of 1 microinch (0.025 μm) AA or better, and a flatness of at least 5 μin (0.13 μm).>Innovations are those useful things that, by dint of chance, manage to survive the stupidity and destructive tendencies inherent in human nature.
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26th May 2019, 01:02 PM #98Deceased
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KISS Principle. (Keep it simple stupid)
The following is the modern version of a Stanley # 60 block plane.
# 220 grit Wet & Dry sandpaper on float glass.
Using WD-40 as a flushing lubricant.
Note the sole is locked in tension via the lever cap.
Note the scratch free surface at 220 grit. (88 microns)
No finer micron medium is required.
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26th May 2019, 01:18 PM #99
Rob,
Most of what your doing is going straight over my head.
But the reason why you’re doing it I appreciate 100 percent, I can not stand listening to the argument
“That’s just because that’s how we do it”
No I want to know why and the reason behind it I carry a sizeable burn scar on my left upper arm because as a five year old i wanted to know why (an now [emoji849][emoji849] inpatient).
The pics with wring very impressive.
Cheers Matt,
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26th May 2019, 01:30 PM #100
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26th May 2019, 02:21 PM #101
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26th May 2019, 02:31 PM #102
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26th May 2019, 02:40 PM #103
Since I've lapped this plane down to the point that it will wring I beg your indulgence as I test its cutting prowess one more time. Then I'll start lapping the back of the blade.
(P.S., now that it will wring I've realized I can store my planes by wringing them to a flat plate screwed to the ceiling!)
At this point I'm confident in saying that flatness of plane soles does matter.
Look back over the data I've presented in this thread. The plane lapped at 60 microns could only produce a consistent surface when set to cut 0.001" thick shavings. After lapping to 3 microns it can produce consistent 0.008" shavings. At each intermediate step in the lapping process the finish of the cut surface got better.
I'd be interested to hear some constructive thoughts.
As an aside, I like this article: https://www.theatlantic.com/technolo...g-data/250820/Innovations are those useful things that, by dint of chance, manage to survive the stupidity and destructive tendencies inherent in human nature.
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26th May 2019, 03:25 PM #104
More on wringing, NIST pubs so no copyright worries.The Gauge Block Handbook.pdf
Innovations are those useful things that, by dint of chance, manage to survive the stupidity and destructive tendencies inherent in human nature.
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27th May 2019, 01:34 AM #105
Here is the plane bottom examined though the comparator up against the 2L (2 micron lapped) standard.
The standard is on the upper right of the field, it's pushed up a bit to differentiate it from the plane pictured on the left (horizontal line). Once again, the plane bottom is consistent with what it should be.
https://en.wikipedia.org/wiki/Lapping#Accuracy_and_surface_roughness
<Surface roughness and surface flatness are two quite different concepts.>Innovations are those useful things that, by dint of chance, manage to survive the stupidity and destructive tendencies inherent in human nature.
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