Abstract: A link chain, in particular bush chain, comprising an inner link plate with a bush, an outer link plate with a pin, wherein the pin and bush form a chain joint, wherein a sealing arrangement is provided for sealing the chain joint, wherein the sealing arrangement is arranged between the inner link plate and the outer link plate, and wherein the sealing arrangement comprises a seal and a seal-accommodating space, characterized in that in that the seal-accommodating space is formed from a thrust washer and an annular cutout, in particular in the outer link plate, wherein a ring, which is designed in the form of a metal ring, is arranged in the seal-accommodating space, or in that the seal-accommodating space is formed from a thrust washer and an accommodating washer.

Abstract: A roller device comprises: an attachment bolt; a roller mounted on the attachment bolt, wherein the roller is configured as a roller unit including at least one attachment bush, a bearing, and a roller; and a fastening system to releasably fasten the bush of the roller unit to the attachment bolt. The fastening system comprises a clip fastening system to mount the roller unit on the attachment bolt without using tools. The clip fastening system comprises a radially encircling groove in the inner surface of the attachment bush, a radially encircling groove in the surface of the attachment bolt, and a flexible securing ring.

Abstract: A link chain, in particular bush chain, comprising an inner link plate with a bush, an outer link plate with a pin, wherein the pin and bush form a chain joint, wherein a sealing arrangement is provided for sealing the chain joint, wherein the sealing arrangement is arranged between the inner link plate and the outer link plate, and wherein the sealing arrangement comprises a seal and a seal-accommodating space, characterized in that in that the seal-accommodating space is formed from a thrust washer and an annular cutout, in particular in the outer link plate, wherein a ring, which is designed in the form of a metal ring, is arranged in the seal-accommodating space, or in that the seal-accommodating space is formed from a thrust washer and an accommodating washer.

Abstract: A roller device comprises: an attachment bolt; a roller mounted on the attachment bolt, wherein the roller is configured as a roller unit including at least one attachment bush, a bearing, and a roller; and a fastening system to releasably fasten the bush of the roller unit to the attachment bolt. The fastening system comprises a clip fastening system to mount the roller unit on the attachment bolt without using tools. The clip fastening system comprises a radially encircling groove in the inner surface of the attachment bush, a radially encircling groove in the surface of the attachment bolt, and a flexible securing ring.