Hand Tools Archive

Subject:
Comparative Profile Pictures

David Weaver
My supposed 28 degree chisel (just over 27 degrees according to the pictures)

That picture with some lines and scale on it (the scale is estimated - I haven't figured out how to get the bits on the scope software to stay permanent on the picture, so I had to add them in MS paint). The angles were measured with the scope software, though.

Unicorn profile (I reground this chisel to make sure that I hadn't lost any edge in just a quick refresh of the plane mortising - any tiny amounts off of corners are no matter in use - as in, amounts you wouldn't see with the naked eye, but they could be really misleading. It's also possible that the edge would look ever so slightly different in the center of the chisel given that we're using a buffer and it isn't exactly a laser precise process).

With lines drawn on this (the angle we're seeing is the secondary angle. The primary is a little bit shallower and longer than this picture - my scope only goes down to about 75x or something like that, so, can't get long parts of the edge profile, but the secondary grows, anyway and may get an extra degree or two before being reground).

Anyway, with lines drawn on this, it's a lot easier to see what's going on.


Messages In This Thread

Sharpening and buffing progression pictures *PIC*
Separate on the IH sorby chisels..
If the UK guys are correct...
Comparative Profile Pictures
Re: Comparative Profile Pictures
Re: Comparative Profile Pictures
I have never looked closely at...
Profile pictures *PIC*
Thoughts on the data
Scale of Image
Re: Thoughts on the data
Angle near the edge *PIC*
Re: Angle near the edge
Re: Angle near the edge
This is a difficult thing to do precisely
Re: Angle near the edge
Capturing the Unicorn Profile
Re: Capturing the Unicorn Profile
Outstanding work, Winston! *NM*
Re: Capturing the Unicorn Profile
but, do I need to?
Calcined alumina *PIC*
sounds like gunpowder...
Scratches from various compounds *PIC*
Scratches from more compounds; buff vs stick *PIC*
Other Compounds
Re: Other Compounds *PIC*
Correction
Re: Other Compounds - reinventing the wheel...
will do...
Well! good work
Red stuff
File in useless knowledge
partly my fault for voluminous posts..
hardness of iron oxide
Google monster says
Re: hardness of iron oxide
Wooden planes
Re: Wooden planes—Steve Voigt link *LINK*
Re: Wooden planes
Re: Wooden planes
Re: Wooden planes
Re: Wooden planes
Thanks, Jon!!
Re: Wooden planes
great experiments
Re: great experiments *PIC*
Re: Scratches from more compounds; buff vs stick
wait till you try...
The white stuff is...
Re: The white stuff is...
various compounds - difficult to judge
Re: various compounds - difficult to judge
looking forward to...
Further Observations
Some other things to try
Re: Some other things to try
Re: Some other things to try
Re: Some other things to try
I am anxious to try your suggestion *NM*
Interesting..
Re: Interesting..
not sure I agree
Re: not sure I agree
Re: not sure I agree
Re: not sure I agree
Re: not sure I agree
Factory ground *PIC*
Marples catalog...
Re: Factory ground
Re: Factory ground 1816 *PIC*
Re: Factory ground 1816
Re: Factory ground 1816 *PIC*
blogger grind
Re: blogger grind *PIC*
you're still failing...
after you do your survey, you'll find
Re: Factory ground 1816
Re: not sure I agree
I remember reading this...
great work
Thank you for experimenting
these results will require some study
David & Winston
Buffing wheel vs hard felt
Re: Buffing wheel vs hard felt
Re: Buffing wheel vs hard felt
Re: David & Winston
Thinking about establishing the Unicorn profile
Amen, Reverend
Re: Amen, Reverend
Tormek
if the tormek had a higher speed leather wheel...
Clarification, please
Re: Clarification, please
Re: Clarification, please
Re: Clarification, please
Re: Clarification, please
Preparing a beading blade
Re: Preparing a beading blade
for testing plane blade durability..
Re: Sharpening and buffing progression pictures
Re: Sharpening and buffing progression pictures
Suzuki Tool 4000
judging scratches
eek...expensive..
Re: Sharpening and buffing progression pictures
Re: Sharpening and buffing progression pictures
Re: Sharpening and buffing progression pictures
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