Joint stock company
Serpukhov Tool Plant

Sales Department: +7(499)-641-02-81
(additional. 2-10, 2-33, 2-44)
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  • Production of the wear-resistant tool on the most advanced equipment
    gives the chance to let out production of the increased accuracy.

  • The high-tech alloy of its own technology allows
    to compete with the most advanced foreign analogues.

  • In our company we produce end mills
    for many industries

  • Production of carbide drills from the plant "TWINTOS"
    size range from 2 mm to 35 mm in diameter.




Normal precision burrs are tools used in roughing processes. They are characterized by their productivity and resistance to high mechanical stress.

Working parts of normal precision burrs are manufactured from hard metals with high strength and resilience. So they can be used under high mechanical stress without breaking.

The manufacturing technology of normal precision burrs provides grooving after pre-sintering without any sharpening of finally sintered working parts. A special technology with powder metallurgy processes is used to manufacture the carbide working parts. The first stage of the technology is grinding and mixing process used to get carbide-cobalt mixture with additives. The mixture goes to processes of pressing and pre-sintering.

The pre-sintering process is necessary to reach mechanical properties enough for grooving. The pre-sintered working parts are machined with CNC grinding and sharpening machines to get cutting edges with necessary geometry characteristics. Diamond wheels are used as a tool for grooving.

In some cases the working parts are pressed with blind holes for locating and attachment in a machine while grooving. Devices for the attachment have a collet as a counterpart. The machined working parts are sintered in vacuum furnaces at a temperature of 1380-1420oC. As a result of final sintering process finished working parts of cemented carbides are got. The sintered parts are controlled with the use of non-destructive testing methods: measurement of sizes and properties of the material - density and magnetic characteristics.

Tested working parts go to brazing process. The working parts and shanks are brazed to end surfaces in case the working parts are solid.

If a working part has blind holes a brazing surface is a hole surface. In that case shanks have a specific shape to fit the shape of the holes. So the shanks are manufactured for each particular working part. It is necessary because of slight buckling of the blind holes while sintering and ensures low chatter of burrs.

The last processes are heat treatment of shanks – hardening and tempering – and grinding of the shanks. The controlled properties of the shanks are sizes and hardness.

One of the specific peculiarities of normal precision burrs is the geometry of cutting edge. Machined before final sintering the edges are not sharp and this is the most appropriate type of cutting edge for roughing.

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