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There are generally six types of oilstones classified from materials: green silicon carbide, white corundum, brown corundum, boron carbide, ruby (also known as sintered corundum) and natural jade.



Oil stone

Oilstone is a natural mineral that has been sintered.


Whetstone sintered corundum (ruby) oil stone: It is a kind of microcrystalline corundum product sintered by high temperature. The structure is compact and delicate, with high hardness and strength.

The product is made into rose red, and the products are three types: small grinding wheel type oil stone, standard type oil stone and grinding head type oil stone.

When grinding the workpiece, it maintains a sharp edge and a stable geometry for a long time.

It is suitable for the forming and grinding of instrument industry, precision parts, micro tools, tools, precision grinding tools, etc. The precision of the surface roughness can reach 0.05μm.

Product specifications:

  • Small grinding wheel type flat grinding wheel with diameter less than 100mm
  • Standard geometry of various sizes of oil stone within 200*50*25mm
  • Diameter of grinding head type of stone with various shapes within 25mm

The size of the oil stone is: 400#-1200#

Industrial Application

Diamond fiber whetstone

This product was produced by introducing advanced foreign technology in the mid-1990s. It has good elasticity, cutting force and wear resistance. It is a difficult surface for mold making, tool repair, bending of various workpieces, holes and ordinary abrasives.

It is an ideal abrasive tool that cannot be replaced by other oilstones, and the price is only one-third of the foreign imports.

The specifications are 1002-100.5-1.2, and the granularity is 320#-1200#.

Ordinary oil stone

Widely used in machinery manufacturing, mold manufacturing, instrumentation and other fields.

Super fine grinding stone

Super fine grinding stone, strong grinding oil stone, widely used in machinery manufacturing, mold manufacturing, instrumentation and other fields.

The work efficiency is twice that of ordinary oil stone.

Ruby oilstone

Ruby is a kind of corundum microcrystals made of aluminum oxide powder sintered at high temperature. The structure is compact and delicate with high hardness and strength.

Because it is a kind of sintered product, it does not have various hardness grades, particle sizes and different strength ranges. However, it has a dense structure and a pore structure. Therefore, the product marks the structure and the product is rose red.

Boron carbide

Boron carbide is a hard black shiny crystal. Hardness is lower than industrial diamond, but higher than silicon carbide.

The size of the whetstone is between 400 and 1000. The smaller the particle size, the coarser the grain size, and the larger the amount of grinding, the grinding of the semi-finished tool.

Because of its strong hardness, it is particularly wear-resistant and is not easy to scratch.

Grinding Method

About diamond paste, particle size from W40 to W0.5.

W40 is the thickest and has a large amount of grinding.

W0.50 is the finest, used for polishing, and does not anneal, and hard knives can also be ground.


Applying the coarse W40 paste to the boron carbide whetstone can speed up the grinding and not anneal.

Then, after cleaning the coarse abrasive paste on the knife, use W0.5 abrasive paste and apply it on ruby or natural jade for polishing. The effect of throwing is mirror.

The three kinds of oilstones of green silicon carbide, white corundum and brown corundum are not hard enough, and the particle size is a bit thick, it is easy to grind the knife, and the other three oil stones do not anneal during polishing and grinding.

There is no difference in particle size greater than 1000, mainly determined by the use of abrasive paste.

The W1.5 paste is applied to a 1000-mesh ruby. The grinding effect is the effect of the W1.5 paste, which is a 2500-grained whetstone effect.

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