Abstract: A guide (30) for surrounding and sealing a rod (26) in the end of a hydraulic cylinder (12) including a piston (24) slidably disposed in the cylinder (12) and attached to the end of the rod (26) and a method for manufacturing the guide (30). The guide (30) includes an inner guide bore (38) with dovetail shaped channels (40) extending annularly about the guide bore (38) and an organic polymeric bearing material (42) disposed in the guide bore (38) in mechanically interlocking engagement with the dovetail channel in the radial direction to exert a radial retaining force from the channel (40) to the bearing material (42) to establish a force fit in the radial direction between the channel (40) and the bearing material (42). placing the guide (30) in a mold (44, 46) defining a cylindrical cavity extending about the guide bore (38) and between the end faces (32) of the guide (30).

Abstract: A guide (30) for surrounding and sealing a rod (26) in the end of a hydraulic cylinder (12) including a piston (24) slidably disposed in the cylinder (12) and attached to the end of the rod (26) and a method for manufacturing the guide (30). The guide (30) includes an inner guide bore (38) with dovetail shaped channels (40) extending annularly about the guide bore (38) and an organic polymeric bearing material (42) disposed in the guide bore (38) in mechanically interlocking engagement with the dovetail channel in the radial direction to exert a radial retaining force from the channel (40) to the bearing material (42) to establish a force fit in the radial direction between the channel (40) and the bearing material (42) placing the guide (30) in a mold (44, 46) defining a cylindrical cavity extending about the guide bore (38) and between the end faces (32) of the guide (30).

Abstract: A piston and cylinder assembly and a method for manufacturing the piston assembly. The piston assembly includes a circular integral piston. A glass-filled plastic bearing material is disposed completely annularly about the piston and extends entirely between end faces of the piston. The plastic bearing material provides a bearing surface for sliding engagement with an inner surface of a cylinder of the cylinder assembly. An annular groove extends through the plastic bearing material and into the piston between the end faces. The piston includes a central bore which is concentric with the groove and the outer circumference of the plastic bearing material. The method for manufacturing the piston assembly includes the step of disposing the piston on a positioning pin which extends into the central bore and disposing the piston in an enclosed mold cavity which is defined by a mold.