Poltava metal bond CBN sharpening stones,
200 х 70 х 3
Length: 200 mm = 7.9 inch
Width: 70 mm = 2.8 inch
Thickness: 3 mm = 0.12 inch
Material: CBN - cubic boron nitride. It has the best cost/productivity ratio for processing of STEEL, comparing to diamond and cheaper stones. CBN is a generic name, there are also other names of this material, depending on manufacturer: borazon, elbor. CBN stones are similar in qualities to Japanese wet stones, have have ten times longer working life.
Material: CBN - cubic boron nitride. It has the best cost/productivity ratio for processing of STEEL, comparing to diamond and cheaper stones. CBN is a generic name, there are also other names of this material, depending on manufacturer: borazon, elbor. CBN stones are similar in qualities to Japanese wet stones, have have ten times longer working life.
CBN grit: any, please select from the list.
Please refer grain size conversion chart at the bottom.
There's also aluminum blank 200-70-10 in grain selection window, just in case you need support plate for these stones. It will be shipped attached to stone with parameters engraved on back and sides and branded "Aldim". I sell blank if you buy stone.
Bronze metal bond M2-01.
Will last forever, although nothing is forever.
Flat solid block, CBN grains are distributed evenly across the volume of the 3 mm thick stone.
These metal bond CBN stones were manufactured before product lines were named as Premium (metal bond 3 mm), Expert (resin bond 3mm) and Premium Lite (metal bond 1.5 mm), please review descriptions below.
Preparation
Metal bond stones with grits finer 3 microns either may require preparation (polishing) with SiC powders, or they will be self-polished after sharpening of 30-50 knives. Then they will be of gold color and work well. The image below shows surface of 0.5/0 stone under microscope, before and after polishing with SiC powders.
Use and cleaning
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: polish it with SiC powders (grain size selection list below), or use Ferric chloride (FeCl, video below):
- 10 mins setting in 25% mixture (25 gr FeCl per 75 gr of water),
- 10 mins polish movements (carefully draw "8") on glass plate.
You may buy 100 gr. FeCl in grain selection window. I sell it if you buy a stone.
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) |
Please review stone flattening/revitalization video with FeCl below.
CBN metal bond stones flattening and revitalization
Video will open in a new window
Using the eBay App? Paste link into a browser window:
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
My listings of Poltava sharpening/honing stones (Length x Width x Abrasive Thickness, mm):
Diamond sharpening stones: not recommended for steels with high carbon content, but perform well with hard steels, like CPM S90V.
CBN sharpening stones: standard for steels.
Combined bond: next generation bond, combines delicacy of resin bond on fine grains, and wear resistance of metal bonds on coarse grain sizes.
Sets: preselected stones to make your choice easier: metal and combined bond sharpening stones on blanks.
Pro 200% - professional stones with concentration 200% (standard stones are 100% concentration), which means higher productivity and longer tool's life.
Economy: cost saving solution for most sharpening applications.
"Pro" and "Economy" are the only nicknames I use for stones and I suppose it's clear why. No pathetic nicknames and brands. Just product as it should be, from trusted Poltava seller.
"Pro" and "Economy" are the only nicknames I use for stones and I suppose it's clear why. No pathetic nicknames and brands. Just product as it should be, from trusted Poltava seller.
Made in Ukraine, by Poltava Diamond Tools, industry standard since 1966
Shipping:
Ukrainian post (ukrposhta.ua), registered mail with tracking number; delivery time to US, Europe - 2-4 weeks.
Tracking will be available on your local post website when order arrives to your country; it is advisable to track on specialized sites like trackitonline, etc.
All orders do arrive if address is correct, but delivery time of some parcels may be delayed up to 2 months because of logistics or customs issues. Please contact me first before opening case.
International Buyers – Please Note:
Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyer's responsibility.
Please check with your country's customs office to determine what these additional costs will be prior to bidding or buying.
Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyer's responsibility.
Please check with your country's customs office to determine what these additional costs will be prior to bidding or buying.
Sharpening with Poltava diamond and cubic boron nitride stones
Sharpening with Poltava diamond and CBN stones
Video will open in a new window
Using the eBay App? Paste link into a browser window:
Grain conversion chart
Catalog of diamond and CBN tools
Video will open in a new window
Using the eBay App? Paste link into a browser window:
