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 Post subject: stone progression for microbevel?
PostPosted: Sun Jul 13, 2014 8:23 pm 

Joined: Sat Mar 29, 2014 4:51 pm
Posts: 10
Hi,

I'm wondering if after going through the 0,5k-2k-8k stone progression to set 15° primary edge, what progression would be best for secondary 20° micro bevel? same onefirst 2 stones, or maybe just last one?


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 Post subject: Re: stone progression for microbevel?
PostPosted: Sun Jul 13, 2014 8:27 pm 
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Joined: Tue Oct 23, 2012 1:14 am
Posts: 604
Location: San Ramon Ca.
The finest stone in a progression is usually used for a micro bevel. Not all the time but mostly.



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 Post subject: Re: stone progression for microbevel?
PostPosted: Sun Jul 13, 2014 9:55 pm 

Joined: Wed Feb 20, 2013 2:22 am
Posts: 696
A lot depends upon the stone. If they're good cutters, then just keeping the 8K would be fine, since there's not a lot of steel to be removed at that point.

Cheers,

Rick


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 Post subject: Re: stone progression for microbevel?
PostPosted: Mon Jul 14, 2014 12:46 am 

Joined: Wed May 16, 2012 1:49 am
Posts: 301
Location: Amstelveen, The Netherlands
On softer steels, start early. With harder ones, only on that last one, I would say.


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 Post subject: Re: stone progression for microbevel?
PostPosted: Mon Jul 14, 2014 1:36 am 

Joined: Tue May 29, 2012 12:29 am
Posts: 885
I typically sharpen with a 1k then micro with my 5k. I find the coarser back finish helps the edge last longer and for some reason always feels sharper.


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 Post subject: Re: stone progression for microbevel?
PostPosted: Mon Jul 14, 2014 5:45 pm 
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If the two sides are touching on your primary bevel then you have already gone through the full sequence. Now you are changing the angle for the microbevel to a more obtuse angle so you can continue on with the same stone or finer. Remember that a microbevel is a TINY bevel. If you look under a scope, you can see a microbevel produced even with a strop - with or without compound. That's why EACH stroke can determine or redetermine the final edge geometry and a careless finishing stroke can wipe out your work.

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Ken



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 Post subject: Re: stone progression for microbevel?
PostPosted: Tue Jul 15, 2014 1:28 pm 

Joined: Sat Mar 29, 2014 4:51 pm
Posts: 10
Thanks for replies.
you all helped me to realized, that what i really meant is not micro bevel but, primary bevel with larger degree to make edge more robust.
I expecting it to be about 20% out of initial secondary edge.
Is this less common practice?, and what would you do in this case as i would have to take at least 0,5mm of metal?

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 Post subject: Re: stone progression for microbevel?
PostPosted: Tue Jul 15, 2014 1:37 pm 
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I'm not following...so:

To set your "A to B" angle....what I would call the primary bevel....I'd use a normal stone progression...500 if needed, 1,000, 5,000, so on.

To set your "C to D" angle....what I'd call the secondary bevel...I'd use only the finest stone I used in the normal progression.



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 Post subject: Re: stone progression for microbevel?
PostPosted: Tue Jul 15, 2014 2:23 pm 

Joined: Fri Mar 14, 2014 2:05 am
Posts: 16
I have been using a very small (2-3 strokes), one sided ( right in my case), micro bevel on the last stone. It seems a bit of a cop out, but results in better edge retention. I still have problems with over sharpening ie., to too high a grit.


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 Post subject: Re: stone progression for microbevel?
PostPosted: Tue Jul 15, 2014 4:38 pm 

Joined: Sat Mar 29, 2014 4:51 pm
Posts: 10
Adam, I though like you, but looks like actual naming is:
A-B - secondary edge/bevel
C-D - primary edge/bevel

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But back to topic, I guess i would go with finest stone as everyone were suggesting.

Thanks for reply.


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