Diamond and CBN sharpening stones
Metal bond sharpening stones: flat solid block (copper-tin alloy), abrasive grains are distributed evenly across the volume of the stone. Metal bond stone does not need support plate, and offers high productivity on rough surfaces, as well as long tool’s life. Trademarks: Aldim, PDTools (Premium product line)
Resin bond sharpening stones: flat solid block (phenol formaldehyde resin), attached to support plate (aluminum blank). Resin bond stones offer high quality of polishing and usually do not clog (do not need lubricant). Trademark: PDTools(Expert product line). Nowadays resin bond stones are legacy products.
Hybrid bond sharpening stones: our innovative solution, which combines best qualities of resin and metal bonds: high performance, mirror polishing and long tooling life. Trademark: Aldim We recommend hybrid (combined) bonds for most applications.
Dimensions and types of sharpening stones (length x width, mm) manufactured in Poltava
| Cubic Boron Nitride (CBN, borazon, elbor) | Diamond | ||||
| Metal bond | Resin bond | Hybrid bond | Metal bond | Resin bond | Hybrid bond |
| 100 x 5 | |||||
| 100 x 6 | |||||
| 100 x 8 | 100 x 8 | ||||
| 125 x 4 | |||||
| 125 x 5 | |||||
| 125 x 6 | |||||
| 125 x 8 | |||||
| 125 x 12 | 125 x 12 | ||||
| 150 x 6 | |||||
| 150 x 12 | 150 x 12 | 150 x 12 | |||
| 150 x 25 | 150 x 25 | 150 x 25 | 150 x 25 | 150 x 25 | 150 x 25 |
| 150 x 35 | |||||
| 150 x 50 | 150 x 50 | ||||
| 200 x 30 | |||||
| 200 x 40 | 200 x 40 | ||||
| 200 x 70 | 200 x 70 | ||||
mm to inch:
100 mm = 3.9; 125 mm = 4.9; 150 mm = 5.9; 200 mm = 7.9; 4 mm = 0.16; 5 mm = 0.2; 6 mm = 0.2; 8 mm = 0.3; 12 mm = 0.5
25 mm = 1; 35 mm = 1.4; 40 mm = 1.6; 50 mm = 2
Beware of fakes and low quality instruments
Poltava has long lasting traditions in industry of superabrasive (diamond and CBN) instruments. 2 factories, operating in Poltava are undoubtful leaders: Poltava Diamond Tools and Poltava Plant of Diamond Tools. It is always possible to find out if you purchased real stuff or imitation, check out below how to.
Instrument must be accompanied with passport, which indicates technical parameters (in Ukrainian): type, dimensions, standard, bond, grain type and size, quality control and, which is important, number. Numbers on instrument and in passport must match. Passport is legal document ! Please review photos below and pay attention on sign № (on wheel and on stone), which is followed by digits. This is number of instrument.
Scammers
1. Many sellers, especially in the US, started offering Poltava sharpening stones with thickness 1.5 mm and do not giving this information in product description, so buyer believes he purchases right stone with standard abrasive thickness of 3 mm. Scammers even leave negative feedback for honest sellers to get rid of competition. Please review sample issue at the bottom of this page.
To be sure you buy right sharpening stone, look trough stone’s passport, which contains:
– stone dimensions, usually on top right: the last number (3 or 1.5) is thickness.
– weight of abrasive in standard stone 150×25 mm, 100% concentration, is 50 cts.(middle left), while for 1.5 mm stone it’s only 25 cts.
– PDT’s stones with thickness of 1.5 mm should be marked as “Lite”, e.g.: Premium Lite (metal bond sharpening stones), Expert Lite (resin bond sharpening stones), but it’s not common.
2. ECONOMY STONES were designed as cost saving solution with quality, comparable to competitive products (that’s why they are marked “Premium”, as PDT’s stones). Nevertheless many sellers sell them as standard products, so buyer believes he buys Premium Poltava product No, these stones are not premium products, and they were not made by Poltava factories.
