A ring drill is a hollow cylinder with a cutting edge on the end. An annular groove is obtained as a result of drilling.

Advantages of ring drills:

1. The optimal sharpening angle makes ring drills universal for various steels.
2. The geometry of the drill prevents excessive heating and facilitates the easy removal of chips, the load on the teeth is evenly distributed.
3. The shape of the teeth and the spiral of ring drills minimizes the pressure on the processed material.

A countersink is a multi-bladed cutting tool for processing holes in parts in order to obtain conical or cylindrical recesses, support planes around holes or chamfering of central holes. It is used for processing drilled holes for the heads of bolts, screws and rivets.

Rollers are widely used for obtaining corrugations, slotted and toothed engagements, shaped profiles. The technology of cold rolling makes it possible to obtain a significant economic effect due to the saving of material, working time, obtaining a high-quality profile with a strengthened surface layer, high repeatability of the process.

Reaming is used for final processing of holes after drilling, countersinking or boring. By rolling, a high level of accuracy and surface roughness is achieved. The high quality of processing is ensured by a large number of cutting edges and the removal of a small allowance. The reamer works during rotation and simultaneous translational movement along the axis of the hole. It allows you to remove a thin layer of material with high precision. In addition to cylindrical holes, conical holes are expanded with special conical reamers.

VC-type carbide insert cutters are used for processing cast iron parts, and TK-type - for processing steel parts. Milling cutters can be integral with soldered plates and are fixed on milling mandrels or on the spindles of milling machines. They are made with right-hand and left-hand cutting.

It is used as a metal-cutting tool for boring a hole on coordinate-retail machines.

We make taps from high-speed steel.

A tap is a tool for cutting internal threads. A tap is a screw with cut straight or helical chip grooves that form cutting edges. The working part of the tap has cutting and calibrating parts. Taps are made of high-speed steel. Taps can be used on lathes and drilling machines and machining centers (machine taps), as well as for hand tapping. There are also nut taps - used for making nuts. Such a tap has a longer shank and a western (calibrating) cutting part.

A three-tooth countersink with a conical shank is used to increase the diameters of cylindrical holes in order to increase their accuracy and surface cleanliness. It allows to obtain a hole of the 4th class of accuracy and the cleanliness of the processed surface within the range of 3-5th classes.