The invention relates to a roller chain to be used in a tenter frame for stretching a textile web of fabric. The chain comprises bolts (2) provided with sleeves (6) that are coaxially mounted thereon. Rollers (9), which are mounted on ball bearings, are coaxially arranged on the sleeves (6). The ball bearings (10) are axially sealed by means of sealing rings (15). The sealing rings (15) should be designed in such a way to transmit mechanical forces in an axial direction and, at the same time, to be able to receive a lubrication channel (22) in a radial direction. To these ends, said sealing rings contain metallic inserts (25) which are provided at separate points that are equally distributed in a circumferential direction, which transmit the forces, and between which space is maintained for a radial lubrication channel (22).