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Natural lapping stone PETROGRAD, 280*150*20mm
Description
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.
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Petrograd Bevel Gauge, round
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Production - factory of joinery and carpentry tools PETROGRAD.
Made in Russia.
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To select and order an abrasive stone of desired grain size, click on the name of the product.
Natural lapping stone PETROGRAD, 200*70*20mm
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.
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Table of contents.
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Chapter I. The wood, its structure and properties ... The age of the twood ... The color of the wood ... The density of the wood ...
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