- Joined
- Apr 3, 2013
- Messages
- 1,105
I have had my Metallic Bonded CBN stones for a while and I have not had the chance to use the 50 grit or the 120 grit much at all as I have not had a need to use a stone that low in grit and I was given some planer blades to sharpen by a friend and they were in pretty ruff shape so I thought why not try out the 50 grit CBN stone and I must say it must be the most useless stone I own and have ever used it's horrible just horrible.
The 50 grit stone seemed to just skate right over the metal and not really remove much at all and just seemed to scratch the edge up really good where the stone had been run over and I think the problem it that the CBN particle's are so big that they just skate over the metal and a grit this lower may be better used like a sanding block or something like that but not for sharpening knives and all I can say is I will never buy another 50 Metallic Bonded CBN stone again.
Now however the 120 grit stone was a totally different story it cut threw the metal very very fast and did not tear up the metal even if I Apex the edge using push pull stroke's and it should be noted I had to use a bit of pressure to get the 120 to cut but once I found the right pressure to use it really cut fast and I would say 3 to 4 times faster then the 50 grit if not faster then 3 to 4 times the speed,I also tried using extreme pressure on the 50 grit and it still did not cut any faster.
I also found that the 120 and the rest of the Metallic Bonded stones seemed to cut faster dry but that could be because I could see the metal filing's building up on the edge like little hairs.
If you are thinking about investing in these stones do yourself a favor and steer clear of the 50 grit and any grit higher then the 50 grit I would say go for it for sure as I have right up to their 8000 grit stone and from the 120 to 8000 they all work very well and I have no reason to complain about them at all.
The 50 grit stone seemed to just skate right over the metal and not really remove much at all and just seemed to scratch the edge up really good where the stone had been run over and I think the problem it that the CBN particle's are so big that they just skate over the metal and a grit this lower may be better used like a sanding block or something like that but not for sharpening knives and all I can say is I will never buy another 50 Metallic Bonded CBN stone again.
Now however the 120 grit stone was a totally different story it cut threw the metal very very fast and did not tear up the metal even if I Apex the edge using push pull stroke's and it should be noted I had to use a bit of pressure to get the 120 to cut but once I found the right pressure to use it really cut fast and I would say 3 to 4 times faster then the 50 grit if not faster then 3 to 4 times the speed,I also tried using extreme pressure on the 50 grit and it still did not cut any faster.
I also found that the 120 and the rest of the Metallic Bonded stones seemed to cut faster dry but that could be because I could see the metal filing's building up on the edge like little hairs.
If you are thinking about investing in these stones do yourself a favor and steer clear of the 50 grit and any grit higher then the 50 grit I would say go for it for sure as I have right up to their 8000 grit stone and from the 120 to 8000 they all work very well and I have no reason to complain about them at all.