Diamond Dresser for Grinding wheels. Any grinding abrasive wheel loses its evenness and abrasive ability (becomes greasy). Diamond t-bar quickly solves this problem by removing some of the abrasive wheel surface to flatten the geometry of the contact point.

Benefits of diamond T-bar by Petrograd toolworks:

• is one of the best flatting diamond abrasives on the market.
• high leveling ability
• high resistance to chipping
• square profile means no wobble

*we reserve the right to change the parameters of the product that do not affect the quality of work.

Petrograd Steel Honing Plate 200(7,8")mm*70(2,7")mm*12(0.47")mm. Precision-ground to a flatness over the entire surface, this honing plate is an excellent substrate for diamond paste. Made of dimensionally stable low-carbon steel, it will retain its flatness over a lifetime of ordinary use; unlike sharpening stones, it will never need truing.

The machining process creates a regular surface pattern, imparting a very slight texture to help capture the diamond grit without compromising overall flatness. In use, the diamond particles readily embed into the softer steel, combining to form a durable, fast-cutting abrasive surface.

Before using it, be sure to check the stone plane for defects (surface curvature) in 6 places.
Lapping stone made of gabbro-diabase *. It is used for lapping the soles of planers, abrasive stones and other surfaces. Has a perfectly flat surface.
When working, use only abrasives for wet sanding on a paper or self-adhesive backing. Approximate dimensions: 280x150x25mm. The error is within +/- 0.07mm per 200mm.
Rubankov production (Russia)

Gabbro-diabase is a fine-grained full-crystalline volcanic rock, which, in its chemical and mineral composition, is quite close to basalt and most often has a black color. A characteristic feature of this stone is its high hardness and significant compressive strength. One of the distinguishing features of this natural stone is its relatively low silica content (about 45-52%). The color of the mineral can vary. There are specimens that are black, dark gray and even greenish-black in color. The stone has a diabase (also called ophite) structure, which is formed by chaotically located and elongated plagioclase crystals, the entire space between which is occupied by augite.

Abrasive for dressing grinding wheels 150mm * 25mm * 25mm. It is used to clean the stone from salting. Also serves to maintain the efficiency of the grindstone by bringing new abrasive grains to the surface of the grindstone.
Press it firmly against the abrasive disc with your hands for 30 seconds. This process does not cause excessive wear on the grindstone and can be repeated many times. This stone is for roughing. After cleaning the surface of the grinding wheel, it must be leveled with a diamond cutter.

Dressing stone for cleaning sharpening water stones in the range of 500 grit and above *, also suitable for diamond stones with any grit. This stone performs well on abrasives with a hard and medium bond, not recommended for use with soft water stones. The stone grain size in the region of 3000 grit (F1000) works very efficiently **. Dressing stone is made on a very soft bond and very easy release self abrasive grains. After cleaning, the treated stone works more efficiently.

Petrograd Steel Honing Plate 300(11,8")mm*105(4,13")mm*18(0.7")mm. Precision-ground to a flatness over the entire surface, this honing plate is an excellent substrate for diamond paste. Made of dimensionally stable low-carbon steel, it will retain its flatness over a lifetime of ordinary use; unlike sharpening stones, it will never need truing.

The machining process creates a regular surface pattern, imparting a very slight texture to help capture the diamond grit without compromising overall flatness. In use, the diamond particles readily embed into the softer steel, combining to form a durable, fast-cutting abrasive surface.

Абразив для наведения суспензии, ПЕТРОГРАДЪ, D80*23мм. Предназначен для высвобождения абразива водных заточных камней. Выпускается в двух разновидностях. Производство фабрика Петроградъ (Россия).

Абразив для наведения суспензии, ПЕТРОГРАДЪ, D80*23мм. Предназначен для высвобождения абразива водных заточных камней. Выпускается в двух разновидностях. Производство фабрика Петроградъ (Россия).

Lapping stone from gabbro diabase. Used for lapping the soles of planes, abrasive stones and other surfaces. It has a perfectly smooth surface. Lapping is carried out with abrasive powders or diamond pastes. Approximate dimensions: 200x70x20 mm. Made in Russia.