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Thread: Plane sole flattening, again...
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8th May 2019, 12:30 PM #16
Here's the sole after 250 strokes on 30 micron lapping compound. I cut tested using the above rig before and after this lapping. Have yet to input and analyze the data.
250 strokes on 30 micron diamond compound.jpg
And after 450
450 strokes on 30 micron diamond compound.jpg
650
650 strokes on 30 micron diamond compound.jpg
850
1150 strokes on 30 micron diamond compound.jpg
1150
1350 strokes on 30 micron diamond compound.jpg
1350
1550 strokes on 30 micron diamond compound.jpg
1550
1750 strokes on 30 micron diamond compound.jpg
1750
2000 strokes on 30 micron diamond compound.JPG
2000
2200 strokes on 30 micron diamond compound.JPG
2500
2500 strokes on 30 micron diamond compound.JPGInnovations 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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8th May 2019 12:30 PM # ADSGoogle Adsense Advertisement
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8th May 2019, 12:55 PM #17Deceased
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2500 strokes on 30 micron lapping compound to flatten the sole of a small block plane. Me smells an engineers foolhardiness in trying to prove a point.
Stewie;
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8th May 2019, 01:32 PM #18Deceased
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For those unaware of the grit size equivalent of 30 micron; https://www.gessweincanada.com/category-s/11328.htm
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8th May 2019, 04:41 PM #19
This stage of lapping has significantly reduced the out of flatness that I found after the 60 micron lapping. Now the maximum is something more like 0.00025"/3.25"
WoodRiver block plane flatness ahead of mouth post 30 micron.jpgWoodRiver block plane flatness behind mouth post 30 micron.jpgWoodRiver block plane flatness toward heel post 30 micron.jpgInnovations 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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8th May 2019, 04:46 PM #20Taking a break
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8th May 2019, 05:07 PM #21Innovations 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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8th May 2019, 05:27 PM #22GOLD MEMBER
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8th May 2019, 05:37 PM #23Innovations 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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9th May 2019, 01:17 AM #24GOLD MEMBER
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Is this going to get an engine turned finish at the end?
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9th May 2019, 01:19 AM #25GOLD MEMBER
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9th May 2019, 06:31 AM #26Innovations 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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9th May 2019, 06:50 AM #27GOLD MEMBER
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It might be "sticky" on end grain if it's completely polished.
One of the reasons I ditched premium planes is that their surface finish is so fine that they need to be waxed more regularly. When I refinish a sole of a plane, I (keep in mind, I'm more of a user with old planes, and not a person who addresses cosmetics - the latter generally chases a finish to a higher level) use PSA roll and as the roll is breaking in, I finish the bottom and stop there. Fresh PSA 80 is a bit brisk and too toothy, but all paper loses its snot pretty quickly under high pressure and low speed (on machines, it never gets abused as badly as it does with a dude leaning on a plane and smashing the abrasive at low speed).
Beyond that, I like the surface finish less because of friction. I don't like corrugated planes, either, so not going that far. Any burrs on a "worn out 80 grit finish" get removed with a light hand (finger) sanding of high grit paper of some sort, but not enough to do anything other than knock burrs off.
If you get a nice long flat end of a panel and plane it with a super finished plane, you'll find it can really have some grip. Keep the wax handy.
Super fine surface finish looks great, though.
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9th May 2019, 06:58 AM #28GOLD MEMBER
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I'm interested in what you come up with, by the way. I was patting myself on the back when I couldn't get a good quality 1 1/2 thousandth feeler under a starrett straight edge on a 9 inch smoother, but there is no way I was within a quarter thou over 3" spans.
I have used the plane that I did that treatment to for quite some time now and I have to admit that as a smoother, it is slightly nicer to use than it would otherwise be, but once I'm sweating, I probably don't notice a difference.
Planes with weight and extreme flatness go over well at wood shows, though - even saying those two things "it's heavy and super flat" gives a new user the idea that somehow the lack of weight in older planes is a quality issue.
No clue how flat the infills (pre-war) were when they were new, but several that I've flattened have needed very little despite at least decades of disuse. That, I thought, was kind of unusual. Later cast norris planes haven't necessarily fared so well (A5s in my case). The A5 is probably the plane (with adjuster) that most people think of when they think norris, but between the instability and the horrid adjuster, it is by far my least favorite. And they're cast steel as far as I can tell, so when they're out of flat, they are really resistant to abrasion on a paper lap. Ugh. Cast iron files away nicely with abrasive - mild steel...well, filing needs to be with a file.
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9th May 2019, 09:03 AM #29
More to do here but this is the data as it stands.
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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9th May 2019, 09:52 AM #30
The issue of how much to polish comes up regularly. Where I live, it's a non-issue because I use my planes on all-comers & we have some very abrasive woods - a polished finish would soon become scratch city on any plane of mine. I spent hours polishing the sole of the first D/T plane I built. A couple of months later, it looked like it was finished on 180 grit, so that's where I usually stop, now.
I've always been in the habit of swiping my plane soles with a block of parrafin wax before & during use. It's mandatory when planing several species I use regularly, like Forest She-oak, which is 'gummy' & quadruples the work if you don't keep your planes well lubricated.
Anyone interested in extreme sole-flattening might like to browse this old thread, from another person who had access to very sophisticated measuring gear.
Cheers,IW
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