PJSC NKMZ produces tooth-type couplings for the shaft diameters between 30 and 950 mm.

Structurally, the couplings are made in two versions: for direct connection of two mechanisms (two gear bushings in one body) and for connection through the intermediate shaft.

Teeth of bushings and cases are made as involute ones with the pressure angle of 20° on the pitch circle. Compensation of line- and angular offsets is obtained by providing the gear bushings outside diameter over the spherical surface as well as by giving the barrel-like shape to the teeth along their length. To extend service life of the couplings the teeth are subject to induction hardening.

The couplings are manufactured with gear bushings of two types:
Type K – with cylindrical opening;
Type K1 – with tapered hole.

In addition, provided are the versions of bushings as per the length:
Version 1 – for long ends of shafts;
Version 2 – for short ends of shafts.

In one coupling combination of bushings of different types, versions and diameters of the holes may be allowed.

Field of application:
Main drive lines of hot and cold rolling mills.

Designation:
Torque transmission from spindles to roll mill work rolls. Installed and fastened on the ends of work rolls.

Design distinguishing features:
Couplings are manufactured of high-grade alloyed steel by forging with further heat treatment and machining. Proven technology of heat treatment combined with optimal composition of alloying elements provides high level of strength and plastic properties of the material. Roller couplings outer diameter: between 300 and 1600 mm. Weight: up to 9 t.

Advantages:
Construction simplicity, maintainability, optimal price.