Stand of cold tube-rolling mill

A stand of a cold tube-rolling mill comprising:

• a housing;
• uprights arranged in pairs on said housing on opposite sides of an axis of rolling;
• upper and lower bearing chocks installed between said uprights;
• means for independently vertically adjusting said upper and said lower bearing chocks;
• pairs of upper and lower backup rolls mounted in corresponding bearing chocks;
• bearing supports positioned in said uprights;
• work rolls installed one above the other in said bearing supports between said pairs of upper and lower backup rolls;
• a device for the positive contact of said backup rolls with said work rolls;
• independent power drive means for controlling vertical setup motions of said bearing chocks of said upper backup rolls and for controlling forces between the work rolls during a rolling operation;
• said device for the positive contact of said backup rolls with the work rolls including a linking mechanism kinematically linking each of said upper bearing chocks with said independent power drive means.