Device for coupling a coolant supply to a roller

A device for coupling a coolant supply to a roller for continuous casting installations, comprising:

• a sealing unit for pressure-tight attachment to an axial roller borehole of a journal of the roller;
• a pillow block cover for attachment to a pillow block, which supports the roller via a roller bearing, for covering the axial roller borehole, said pillow block cover having at least one coolant duct which is fluidly connected to a coolant supply through the axial roller borehole and coupled via the sealing unit to the axial roller borehole;
• and
• a bush insertable into a seat in the roller borehole and secured in the roller borehole via a screw-less plug-in connection,
• wherein the sealing unit includes a first sealing element arranged in fixed rotative engagement with the bush and having a first sealing surface, and a second sealing element having a second sealing surface running on the first sealing surface and supported by or integrated into the pillow block cover, said first and second sealing elements configured as sliding rings running on each other.