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BK17 - want to re-set bevel questions
- Thread starter tuffluv
- Start date
Maybe I'm confused. The blade isn't sharp enough for me so I want to reduce the factory micro-bevel angle down to 30 degrees. If I add another 40 degree micro-bevel, wouldn't that get me right back where I started?
The factory flat grind portion of the blade is way less than 40 degrees.
The factory flat grind portion of the blade is way less than 40 degrees.
- Joined
- Sep 22, 2014
- Messages
- 2,930
This image illustrates double bevel.
Reprofiling to 30° (AB) thins the edge, removing the shoulder of the original 40° bevel. Then adding back the 40° creates the micro bevel (CD).
"Sharp enough" may have nothing to do with complex bevels. The existing edge may just not be refined enough. If you can't get 'phone book paper' shaving sharp at 40° says more about your skill than edge geometry.
Reprofiling to 30° (AB) thins the edge, removing the shoulder of the original 40° bevel. Then adding back the 40° creates the micro bevel (CD).
"Sharp enough" may have nothing to do with complex bevels. The existing edge may just not be refined enough. If you can't get 'phone book paper' shaving sharp at 40° says more about your skill than edge geometry.
daizee
Knifemaker / Craftsman / Service Provider
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- Dec 30, 2009
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- 11,115
Typically we talk about the 'primary grind', which is the 'flat grind' part, that goes halfway up the blade (in the case of the BK-17).
Then there is an 'edge bevel', which is the 40d inclusive shiny area that should cut.
Usually when people speak of a 'micro bevel', it is an *additional* bevel at the edge of that 40d bevel.
Beckers do not ship with a microbevel.
So you could reprofile the edge bevel to 30d. It will be sharper. It will probably also hold up pretty well. If it does NOT hold up well, you could smack a tiny 40d microbevel onto the edge bevel to strengthen the weakest part.
Personally, I would go to 30d inclusive and try it out. The BK-17 also can be very 'sharp' with 40d, but it is not a very 'slicey' blade because the primary grind only goes halfway up the blade. This makes it more of a wedge than the BK-16, for instance.
Then there is an 'edge bevel', which is the 40d inclusive shiny area that should cut.
Usually when people speak of a 'micro bevel', it is an *additional* bevel at the edge of that 40d bevel.
Beckers do not ship with a microbevel.
So you could reprofile the edge bevel to 30d. It will be sharper. It will probably also hold up pretty well. If it does NOT hold up well, you could smack a tiny 40d microbevel onto the edge bevel to strengthen the weakest part.
Personally, I would go to 30d inclusive and try it out. The BK-17 also can be very 'sharp' with 40d, but it is not a very 'slicey' blade because the primary grind only goes halfway up the blade. This makes it more of a wedge than the BK-16, for instance.