I have to try your way of doing it. I layed the knife flat on the primary grind
How compares the Sigma Select 240 grit to the Shapton 220 grit in terms of wear and speed?
BR Oliver
Blade Regrind with Tormek T7?
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Re: Blade Regrind with Tormek T7?
I have not compared them yet, I am still working with the Naniwa Superstone 400.
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Re: Blade Regrind with Tormek T7?
OK I'm looking forward to the results. Currently I am searching for a new coarse stone and I can't decide between the Shapton 120, Sigma Select 240/400 and Naniwa Super 220/400. I need a stone which abrades a lot of Steel (all kind of) and leaves a stable finish with which I can put a microbevel afterwards.
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Re: Blade Regrind with Tormek T7?
I don't think you would like the Shapton 120 :
http://www.youtube.com/watch?v=3ABYFdjAw9s
It cuts well, but is fairly soft for a coarse stone and even under low pressure a lot of abrasive comes off fast. I think you would only be happy with it using it on something like the back of a chisel where the contact area is so wide. I am not sure about abrading a lot of steel and being able to jump to a micro-bevel directly. That is kind of asking for two complete opposite things.
http://www.youtube.com/watch?v=3ABYFdjAw9s
It cuts well, but is fairly soft for a coarse stone and even under low pressure a lot of abrasive comes off fast. I think you would only be happy with it using it on something like the back of a chisel where the contact area is so wide. I am not sure about abrading a lot of steel and being able to jump to a micro-bevel directly. That is kind of asking for two complete opposite things.
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Re: Blade Regrind with Tormek T7?
Yes you could be right Maybe the Imanishi Bester 220 and 400 would be a good combination. Hehe a lot of stones to choose from
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Re: Blade Regrind with Tormek T7?
Mark is using the Shapton 120 I had :
and finding much the same that it is fairly soft and gets muddy very fast : http://www.cliffstamp.com/knives/forum/ ... #msg-34617" target="_blank
This stone seems to be designed to work on very large areas only as if the pressure gets high it gets very friable, hence it isn't in generally recommended for knives. The Sigma Power however is almost the exact opposite, people complain it is too hard.
and finding much the same that it is fairly soft and gets muddy very fast : http://www.cliffstamp.com/knives/forum/ ... #msg-34617" target="_blank
This stone seems to be designed to work on very large areas only as if the pressure gets high it gets very friable, hence it isn't in generally recommended for knives. The Sigma Power however is almost the exact opposite, people complain it is too hard.
Re: Blade Regrind with Tormek T7?
I think this is what it looked like before. :)Cliff Stamp wrote:Do you have a before picture? It really should not take that long. How much force were you using (approximately) and how many passes were you doing (approximately) per second (or minute).
-Brian
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Waiting on a Squeak and Pingo with a Split Spring!
A distinguished lurker.
Waiting on a Squeak and Pingo with a Split Spring!
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Re: Blade Regrind with Tormek T7?
Yes, the Shapton 220 grit also gets muddy very fast.
The Sigma Select Series is meant to grind HSS and other very high amount carbide steels as far as I know, so these stones should not be too hard, but I have no experience with the Sigmas.
The Sigma Select Series is meant to grind HSS and other very high amount carbide steels as far as I know, so these stones should not be too hard, but I have no experience with the Sigmas.