Hand Tools

Subject:
Re: Why grind unhardened steel on CBN?

Patrick Chase
Sorry, for the self-reply, but on a related note: Friable ("white") wheels and seeded-gel abrasives as in Norton 3X wheels and zirconia-ceramic belts are also not economical for annealed O1, though all will work fine.

Friable wheels release abrasive too easily for such soft metals, and end spraying a fine dusting of perfectly sharp, not-used-up abrasive grains all over your shop. It's simultaneously a mess and a waste of money. The abrasive in those wheels is perfectly fine, but you need a harder binder to match the retention time to the abrasive life with such soft metals.

Seeded-gel abrasives as in 3X are long-lasting because the abrasive particles shard and expose fresh points. The catch is that the metal being ground needs to be fairly hard to make that happen, and annealed O1 won't do it. You can make the abrasives in a 3X wheel or ceramic belt work as intended with soft metals by periodically "breaking the abrasive" with a hardened bar or scraper (George has described doing this in the past IIRC) but it's still an overly expensive way to work IMO.

The wheels that ship with Rikon grinders are actually a near-perfect choice for this sort of work, because they use the same white-alumina (WA) abrasive as the white friable wheels but in a harder binder. They aren't full of cheapo abrasive like the wheels that ship with most grinders.

David is right in his other post, though: With annealed steel it pays to do as much shaping as possible with cutting tools (files etc). It's cleaner, more precise, and more economical.

Messages In This Thread

flattening Waterstones- shapton pro
Re: flattening Waterstones- shapton pro
Re: flattening Waterstones- shapton pro
Re: flattening Waterstones- shapton pro
Re: flattening Waterstones- shapton pro
Flattening
Revise atoma price...
Re: Revise dia-sharp price...
Diamond plates
Re: Diamond plates
Diamond plates......
Re: diasharp vs. diaflat
Re: diasharp vs. diaflat
Re: I think...
Re: I think...
Re: flattening Waterstones- shapton pro
Yes, this
lapping film?
Re: lapping film?
Re: lapping film?
you are not kidding!
Re: lapping film?
A different perspective *LINK*
Re: A different perspective
Not universal preference
to date
Re: to date
Re: to date
Re: to date
Re: to date
:) *NM*
Re: to date
Re: A different perspective
My Opinion...
Re: My Opinion...
My thoughts
Re: My thoughts
Re: My thoughts
The flat wheel surface - or not..
Re: The flat wheel surface - or not..
Re: The flat wheel surface - or not..
Re: The flat wheel surface - or not..
CBN and grit
How Are You Cleaning The CBN Wheel . . .
Re: How Are You Cleaning The CBN Wheel . . .
Re: How Are You Cleaning The CBN Wheel . . .
Why grind unhardened steel on CBN?
Re: Why grind unhardened steel on CBN?
Re: How Are You Cleaning The CBN Wheel . . .
Re: A different perspective
Re: flattening Waterstones- shapton pro
Quick and dirty summary:
Re: Quick and dirty summary:
Atoma - $64
Re: Atoma - $64
Sandpaper Flattening & Shaptons
Re: Sandpaper Flattening & Shaptons
Re: Sandpaper Flattening & Shaptons
Re: Sandpaper Flattening & Shaptons
Stearate coating
Re: Stearate coating
Re: Stearate coating
Re: Stearate coating
Plastic laminating sheet
Re: Stearate coating
which side to use?
Re: which side to use?
Re: which side to use?
Re: which side to use?
a little bit the Indian and a little bit arrow
Re: a little bit the Indian and a little bit arrow
What a great thread this has been.....
Re: What a great thread this has been.....
Re: What a great thread this has been.....
Re: What a great thread this has been.....
Traditional Method
Re: Traditional Method
Re: Traditional Method
Re: Traditional Method *LINK* *PIC*
Re: Traditional Method
Re: Traditional Method
Re: Traditional Method
Re: Traditional Method
Re: Traditional Method
Re: Traditional Method
Re: Traditional Method
Re: Traditional Method
Re: Traditional Method
Re: Traditional Method
My apologies for being a bit too harsh..
Re: Washita vs soft Arkansas stones...
Re: Washita vs soft Arkansas stones...
Re: Washita vs soft Arkansas stones...
Re: Washita vs soft Arkansas stones...
well then....
Another possibility presents itself......
CBN plates
Re: Not making sense..
Diamond wear
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Re: Diamond wear
Re: Diamond wear
Re: Not making sense..
Re: Not making sense..
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