Spyderco Triangle Sharpmaker Cubic Boron Nitride Rods Set of 2 - 204CBN


MSRP* : $82.00 | You Save* : $24.60 (30%)
Part #: SP204CBN | Spyderco Knives
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SP204CBN: Cubic Boron Nitride Rods


These are steel triangles blanketed in a bonding agent then covered in Cubic Boron Nitride particles. Cubic Boron Nitride is a superabrasize that is second in hardness only to diamond. It offers superior abrasion resistance and thermal conductivity compared to conventional abrasives like silicon carbide and aluminum oxide, making it the preferred abrasive in many advanced industrial grinding applications. Now you can combine the advantages of this fast-cutting superabrasive with the convenience and ease of use of Spyderco's Tri-Angle Sharpmaker. Extremely hard abrasives are recommended when you wish to remove stock, for restoration purposes and to aggressively re-shape, re-bevel and re-profile a cutting edge.

Use extra caution when using these rods, too much pressure will remove the particles from the steel triangles.

Sold in a pair, 204CBN triangles fit into the 204 Sharpmaker sharpening system.


  • CBN grit size is about 40 microns
  • CBN abrasive is significantly coarser than the medium ceramic stones
  • CBN rods should be used with VERY LIGHT pressure. Recommended use of less than 5 grams (there are 28 grams in an ounce) and excessive pressure may shear the abrasive off the base layer that binds it to the rod.
  • Recommended misting the rods with water before use to reduce metal dust and slow the abrasive process
  • The rods are ideal for reprofiling the bevel angle of a knife or rebeveling chipped or nicked blades
  • Because the abrasive is coarse, users should expect a bit of work with the medium stones afterward if they want to smooth the bevels to the finer grit
Made in USA
Made in USA This product is USA born and raised.
Spyderco Triangle Sharpmaker Cubic Boron Nitride Rods Set of 2rated 4.500 stars out of 5 (2 reviews)
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Spyderco Triangle Sharpmaker Cubic Boron Nitride Rods Set of 2
rated 5 stars out of 5
Robert N
Jan 17, 2017
Pros: Effectiveness, Overall Quality, Ease of Use
Cons: None
Cubic Boron Nitride Rods great addition to sharpening kit
Spyderco's CBN rods match up very well with their Diamond sharpening rods, which I have used for quite awhile. Both are used mostly with moderate re-sharpening (not touch-ups), taking out nicks or edge chips, and making bevels even. (I use bench diamond stones for any initial reprofiling.)As with the diamond stones, first usage feels a little rougher/coarser grit than after a few uses. The CBN rods have settled into a slightly finer grit/finish than the diamond rods--barely noticeable, though. These CBN rods are especially helpful with harder "supersteels" like Maxamet, S110V, and ZDP-189, saving lots of sharpening time initially before moving onto the Spyderco medium rods.Pay heed to the cautions about not applying too much pressure on your sharpening passes. That will NOT speed up sharpening, but will speed up dislodging the CBN particles from their bond with the rods, hastening wearing out the rods. (same caution applies to all bonded rods/plates of course.) This is more notable for the edges of the rods, but I use only the flats probably 99% of the time with bonded rods.I would not use these rods for sharpening Spyderedge/serrated edge blades--too aggressive. But then I rarely use the Sharpmaker for serrated eges anyway; usually full-round and half-round slipstones of the appropriate radii.At this point I couldn't say which I would prefer between CBN vs diamond rods for the Sharpmaker. Results seem equally good with both. We'll see how they hold up and compare after a year.
Spyderco Triangle Sharpmaker Cubic Boron Nitride Rods Set of 2
rated 4 stars out of 5
McLean, VA
Jun 18, 2014
Pros: Effectiveness, Ease of Use, None
Cons: Durability
Works As Advertized
These 'cubic boron nitride' rods worked as advertized: in a reasonable amount of time, they put an edge on a difficult-to-sharpen D2 steel blade I use for heavy-duty utility tasks.I didn't give them 5 stars due to the fact that they come with warnings not to press a blade too hard on them; if you do, they say, the abrasive coating will wear off. This leads me to wonder about their longevity under normal use. Only time will tell... In any case, I'm finding them good for fast removal, and hard-to-sharpen steels.


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