Abstract: An assembly for insertion in line into a pipestring of an oil well, for enabling manual rotation of the pipestring by one person. The assembly sits atop an existing well head, and is clamped thereto by a hammer nut. The assembly comprises a generally cylindrical housing having an internal shoulder and an external flange. Nested within the housing are, respectively, a bottom plate, a race and a bearing, a top plate, a resilient rubber washer, a rigid washer, and a threaded cap. These internal components all have a central opening through which passes a central section of tubing. This section of tubing is threaded at both ends, and extends beyond both ends of the cylindrical housing. The section of tubing has an external flange supported on the bearing, and supports the weight of a pipestring. The section of tubing threads above and below to existing threaded tubing.