Description: CBN sharpening stones, Poltava150 х 25 х 3 Length: 150 mm = 6 inchWidth: 25 mm = 1 inch CBN thickness: 3 mm = 0.12 inch Material/abrasive: CBN - cubic boron nitride. It has the best cost/productivity ratio for processing of STEELS, comparing to diamond and cheaper stones. CBN stones are similar in qualities to Japanese wet stones, but have ten times longer working life. CBN is a generic name, there are also other names of this material, depending on manufacturer: borazon, elbor, cubonite. CBN grit: any, please select from the list. Please refer grain size conversion chart below, or more detailed grain size conversion table on the bottom of the listing. Grain size and operation reference chart30000 grit = 0.5/0 μ - fine polishing15000 grit = 1/0 μ - fine polishing10000 grit = 2/1 μ - fine polishing5000 grit = 3/2 μ - fine polishing4000 grit = 5/3 μ - polishing3000 grit = 7/5 μ - polishing1700 grit = 10/7 μ - polishing1500 grit = 14/10 μ - polishing1100 grit = 20/14 μ - polishing650 grit = 28/20 μ - polishing550 grit = 40/28 μ - fine grinding325 grit = 50/40 μ - fine grinding285 grit = 63/50 μ - fine grinding240 grit = 80/63 μ - fine grinding225 grit = 100/80 μ - fine grinding160 grit = 125/100 μ - grinding100 grit = 160/125 μ - grinding80 grit = 200/165 μ - sharpening / rough grinding 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. 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 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. Actually, these stones are identical (no other information from manufacturer) to Poltava Premium CBN Metal bond stones, but:- my stones are without blanks (which are not necessary, but may be purchased separately);- paper (not plastic) packaging;- my stones are cheaper, but price should be compared to Premium stones (3mm CBN thickness), not Premium Lite (1,5 mm CBN thickness). Concentration 100%.Do not waste your money on cheaper stones with lower/unknown concentrations. PreparationMetal bond stones with grits finer 3 microns either require preparation on cast iron plates, 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 (unclogging)Use any comfortable oil (baby, olive..) to prevent glazing. If glazed - clean (unclog) with alcohol and toothbrush. Maintenance is only needed every year or two to flatten stone or "open up" abrasive grains.In 1-2 years you may need to flatten stone, 20 mins 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. of FeCl in grain selection window. I sell it if you buy a stone. Please review stone flattening/revitalization video 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: [isdntekvideo]
Price: 4 USD
Location: Poltava
End Time: 2024-08-24T07:01:47.000Z
Shipping Cost: 9 USD
Product Images
Item Specifics
Return shipping will be paid by: Buyer
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money Back
Brand: Poltava diamond tools
Type: Sharpening Stone
Color: Brown
MPN: Does Not Apply
Material: Cubic Boron Nitride
Country/Region of Manufacture: Ukraine
Available Variations
Color: 2/1
Price: 94 USD
Available Quantity: 9
Quantity Sold: 7
Color: 3/2
Price: 94 USD
Available Quantity: 14
Quantity Sold: 12
Color: 5/3
Price: 94 USD
Available Quantity: 5
Quantity Sold: 3
Color: 7/5
Price: 94 USD
Available Quantity: 12
Quantity Sold: 9
Color: 10/7
Price: 94 USD
Available Quantity: 6
Quantity Sold: 4
Color: 14/10
Price: 94 USD
Available Quantity: 10
Quantity Sold: 8
Color: 20/14
Price: 94 USD
Available Quantity: 11
Quantity Sold: 9
Color: 40/28
Price: 94 USD
Available Quantity: 17
Quantity Sold: 14
Color: 50/40
Price: 94 USD
Available Quantity: 7
Quantity Sold: 5
Color: 63/50
Price: 94 USD
Available Quantity: 5
Quantity Sold: 3
Color: 80/63
Price: 94 USD
Available Quantity: 4
Quantity Sold: 2
Color: 100/80
Price: 94 USD
Available Quantity: 10
Quantity Sold: 7
Color: 125/100
Price: 94 USD
Available Quantity: 8
Quantity Sold: 6
Color: 160/125
Price: 94 USD
Available Quantity: 11
Quantity Sold: 9
Color: 200/160
Price: 94 USD
Available Quantity: 10
Quantity Sold: 8
Color: 0.5/0
Price: 99 USD
Available Quantity: 7
Quantity Sold: 5
Color: 1/0
Price: 99 USD
Available Quantity: 10
Quantity Sold: 8
Color: 250/200
Price: 111 USD
Available Quantity: 4
Quantity Sold: 2
Color: 315/250
Price: 111 USD
Available Quantity: 5
Quantity Sold: 3
Color: Alumin.blank 160-25-3
Price: 4 USD
Available Quantity: 87
Quantity Sold: 81
Color: 28/20
Price: 94 USD
Available Quantity: 5
Quantity Sold: 3
Color: FeCl 100 gr
Price: 8 USD
Available Quantity: 11
Quantity Sold: 6
