Hand Tools

Subject:
Re: Heat balance at plane blade tip

david weaver
I would imagine based on the pictures that we saw, there is cap iron friction created away from the very edge itself, and that the overall heat created is greater with the cap iron than without. I can't confirm that, but someone willing to do so could easily plane for five minutes with two fresh irons, remove the same volume of wood from the same board and just take a measurement of the cap and the iron 1/4" from the edge with a non-contact thermometer and see what's going on.

The last contact with the wood on the iron is pretty well defined - if you set the cap at a hundredth, it's about 4 thousandths, maybe 3 (we saw that in all of my pictures).

My curiosity with the various irons (and it goes no further than mild curiosity) is whether or not at a supremely thin layer, something is going on that's related to temperature sensitivity with regular planing. Too many variables in real work - maple that warren describes has very good tensile strength in the shavings and the shavings are very smooth. i could see it generating more heat than beech.

The reason my curiosity doesn't go too far is that I wasn't overly deliberate in testing the irons, and the numbers tell us the most important thing (how long just planing wood like you might do in reality).

It's only a single point of extra interest that before this, I'd kind of categorized steels based on their temper temperature, less because of heat planing, but more in being mindful on the grinder. Rob had mentioned V11 as being considered in the same territory due to temper temperature and need for care on the grinder. I got surprised then when I accidentally hardened one of the irons and then thought I could just heat them some (but not up to quench) and anneal them. then, seeing the temper chart for XHP and seeing that it's still C58 at 800 degrees F, it's sort of a situation where you can make it softer by accident, but running all of the temper out by making it just a little hot? Probably not.

Is all of that more important than just testing the planes for durability and not considering all of the factors? Not to me. It is good for someone to know that if they brown the tip of one of those irons a little bit, they should just use it. It's probably still easily usable hardness.

Messages In This Thread

Heat balance at plane blade tip
Re: Heat balance at plane blade tip
Re: Heat balance at plane blade tip
Re: Heat balance at plane blade tip
Re: Heat balance at plane blade tip
Re: Heat balance at plane blade tip
Re: Heat balance at plane blade tip
K&K SEM pictures
Re: K&K SEM pictures—here they are *LINK*
Re: K&K SEM pictures—here they are
Re: K&K SEM pictures
Re: K&K SEM pictures *LINK*
Re: K&K SEM pictures
The data shown above
Re: The data shown above
Re: The data shown above
Re: The data shown above
Re: Agree on three points
Question about setting blade exposure
Re: Question about setting blade exposure
Re: Question about setting blade exposure
Re: Question about setting blade exposure
Is planing the way to level this surface
Toothing planes
Gosh...
Re: Gosh...
Re: Gosh...
Re: Is planing the way to level this surface
Re: Question about setting blade exposure
Re: Question about setting blade exposure *PIC*
summary?
Re: summary?
Re: Question about setting blade exposure
A small experiment
Re: A small experiment
question
Re: question
clever setting procedure; blurring? *PIC*
Re: clever setting procedure; blurring?
Holly inlay properties
Divergence from the classic
Re: A small experiment
Re: A small experiment
Re: totes etc.
Re: Handle shaping method and tools... *LINK*
Re: A small experiment
Re: A small experiment
I used to get fired up...
The whole translation/review—for the obsessed *LINK*
Re: The whole translation/review—for the obsesse
Re: The whole translation/review—for the obsesse
Re: The whole translation/review—for the obsesse
Where is this going?
The purpose of the original test...
Re: The purpose of the original test...
What's allowed on forums?
you underestimate the interest
Re: you underestimate the interest
bored to tears ?
Re: bored to tears ?
There is one thing remaining..
My suspicion...
Re: My suspicion...
Re: My suspicion...
Another table from SB
Yes - the confusion without XHP
Odd thing about CTS-XHP wear resistance
All metal wear not equal
Re: This isn't Instagram
Re: This isn't Instagram
Re: The whole translation/review—for the obsesse
Re: not quite, but find what you like...
David - keep at it
Re: David - keep at it
Re: David - keep at it
I don't understand social media
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