CBN SHARPENING STONES METAL BOND, 150x25, 150x50

CUBIC BORON NITRIDE, CBN, BORAZON
 SHARPENING STONES
CBN (cubic boron nitride) is a generic name, there are also other names of this material, depending on manufacturer: borazon, elbor, cubonite, etc. 
CBN (cubic boron nitride) is the second-hardest material after diamond,  and has the best price-performance ratio for processing steels, comparing to other materials, including diamond, silicon carbide or aluminum oxide.  
Due to it's high resistance specs, CBN can be used dry without lubricant. This makes CBN the cleanest of the available sharpening stones.  
 
Length: 150mm  
Width: 25, 50 mm 
Height: 3 mm  
Total height (with blank): 7 mm

Recommendations on selection of sharpening stones.
How to maintain sharpening stones 
 
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Metal bond M2-01, may require lubricant.   
Flat solid block on aluminum blank, abrasive grains are distributed evenly across the stone. 

Grain size: Please select from the list, or read Technical information.  

 
CBN concentration: 100%
Do not waste your money on cheaper stones with lower/unknown concentration.
 
Available on stock 

Preparation of sharpening stones
Stones with grits finer 3 microns either require preparation (dressing), or they will be self-polished after sharpening of 30-50 knives. Then they will be of gold color and work well.
This is common issue for all manufacturers: abrasive grains are covered with bond, so you need to "release" them. 
"Stone preparation" is not available because of war.  



Selection of SiC powders for  dressing  of sharpening stones

Stone	Starting grit	Finishing grit
500/400 μ = 35/40= D501	F16 (1230 μ)	F24 (745 μ)
400/315 μ = 40/45= D426	F16 (1230 μ)	F46 (370 μ)
315/250 μ = 50/60= D301	F24 (745 μ)	F46 (370 μ)
250/200 μ = 60/70= D251	F24 (745 μ)	F60 (260 μ)
200/160 μ = 70/80= D213	F36 (525 μ)	F60 (260 μ)
160/125 μ = 100/120= D151	F46 (370 μ)	F80 (180 μ)
125/100 μ = 120/140= D126	F60 (260 μ)	F100 (129 μ)
100/80 μ = 140/170= D107	F60 (260 μ)	F120 (109 μ)
80/63 μ = 170/200= D91	F80 (180 μ)	F150 (82 μ)
63/50 μ = 230/270= D64	F100 (129 μ)	F180 (69 μ)
50/40 μ = 270/325= D54	F120 (109 μ)	F220 (58 μ)
40/28 μ = 550= M40	F150 (82 μ)	F240 (46 μ)
28/20 μ = 650= M25	F180 (69 μ)	F320 (30 μ)
20/14 μ = 1100= M20	F240 (46 μ)	F400 (18 μ)
14/10 μ = 1500= M16	F320 (30 μ)	F400 (18 μ)
10/7 μ = 1700= M10	F400 (18 μ)	F600 (10 μ)
7/5 μ = 3000= M6.3	F600 (10 μ)	F800 (6,7 μ)
5/3 μ = 4000= M4	F600 (10 μ)	F800 (6,7 μ)
3/2 μ = 6000= M1.5	F800 (6,7 μ)	F1200 (3 μ)
2/1 μ = 10000	F800 (6,7 μ)	F1200 (3 μ)
1/0 μ	F800 (6,7 μ)	F1200 (3 μ)
0.5/0 μ	F800 (6,7 μ)	F1200 (3 μ)

Use and cleaning of CBN sharpening stones
Use any comfortable oil (baby, olive..) to prevent glazing. If glazed - clean with alcohol and toothbrush.

Maintenance is only needed every year or two.
In 1-2 years you may need to flatten stone, 20 mins with Ferric chloride (FeCl):
- 10 mins setting in 25% mixture (25 gr FeCl per 75 gr of water),
- 10 mins polish movements (carefully draw "8") on glass plate.
There are other methods (with SiC powders..), but method with FeCl, on glass plate is the cheapest and simplest.

You may buy 100 gr. of FeCl in dimensions selection window (click also any grain size to select it). I sell it if you buy a stone.

Grain size/operation reference chart
30000 grit = 0.5/0 μ - fine polishing
15000 grit = 1/0 μ - fine polishing
10000 grit = 2/1 μ - fine polishing
5000 grit = 3/2 μ - fine polishing
4000 grit = 5/3 μ - polishing
3000 grit = 7/5 μ - polishing
1700 grit = 10/7 μ - polishing
1500 grit = 14/10 μ - polishing
1100 grit = 20/14 μ - polishing
650 grit = 28/20 μ - polishing
550 grit = 40/28 μ - fine grinding
325 grit = 50/40 μ - fine grinding
285 grit = 63/50 μ - fine grinding
240 grit = 80/63 μ - fine grinding
225 grit = 100/80 μ - fine grinding
160 grit = 125/100 μ - grinding
100 grit = 160/125 μ - grinding
80 grit = 200/165 μ - sharpening / rough grinding

 
Free shipping
Contact us for combined shipping  quote or bulk discounts. 

Knife sharpening with CBN combined bond stones

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Please read more about: Shipping Warranty, returns and refunds Grain size conversion, selection and use of your tool

• Model: CBNST150
• Manufacturer: