Diamond sharpening, honing stone, metal bond,
Poltava
Stones' lengths: 100-200mm (4''-8''), please select from the drop-down list
Dimensions:
Length x width x thickness, mm
Selection of SiC powders for dressing of sharpening stones
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.
100 x 8 x 4 mm = 4'' x 0.3'' x 0.16''
125 x 12 x 5 mm = 5'' x 0.5'' x 0.2''
150 x 25 x 3 mm = 6'' x 1'' x 0.1''
200 x 40 x 5 mm = 7.9'' x 1.6'' x 0.2''
Diamond grit: any, please select from the list.
Please refer grain size conversion chart below, or just consider:
the finest grain size is Grit 30000 = 0.5/0 micron (fine polishing),
the coarsest - Grit 80 = 200/160 micron (rough grinding).
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
Concentration - 100%
Do not waste your money on cheaper stones with lower/unknown concentrations.
Types of diamond powders:
Micron powder ACH 3/2 - 40/28
Grinding powder (>40 microns):
100 x 8 x 4 - AC15
125 x 12 x 5 - AC15
150 x 25 x 3 - AC32
200 x 40 x 5 - AC15
Metal bond.
Will last forever, although nothing is forever.
Flat solid block, diamonds are distributed evenly through the volume of the stone.
There's also aluminum blank 160-25-3 (4usd) in grain selection window, just in case you need support plate for these stones(e.g. to maintain the same thickness of stones in a set). Yet, in most cases, it is not necessary. I sell blank if you buy stone and ship blank marked and attached to stone; tell me if you want blank and stones separate.
These 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
Stones with grits finer 3 microns either may require preparation(dressing, surface polishing, breaking the stone) 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.
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, with SiC powders(grit selection table below), or with Ferric chloride (FeCl):
- 10-20 mins setting in 25% mixture (25 gr FeCl per 75 gr of water),
- 5-10 mins polish movements (carefully draw "8") on glass plate.
You may buy 100 gr. FeCl in dimensions selection window. I sell it if you buy a stone.
Please review video about flattening/revitalization of metal bond stones
CBN metal bond stones flattening and revitalization
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| 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) |
Sharpening with Poltava diamond and cubic boron nitride stones
Sharpening with Poltava diamond and CBN stones
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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.
Consistent concentration and particle size distribution of our diamond wheels and stones, illustrated with photos made under magnification.
Made in Ukraine
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.
Grain conversion chart
Catalog of diamond and CBN tools
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