A tube scraping apparatus comprises a body having a passageway for receiving a piping component; and a first blade and a second blade. The first blade and second blade each: are mounted to the body and shiftable between a first condition and a second condition; and having an engagement portion positioned to engage an outer diameter (OD) surface of the received piping component in at least one condition, the first blade engagement portion comprising a cutting edge for removing material from the OD surface. The second blade engagement portion comprises a partial thread for engaging the piping component to convert a rotation of the piping component relative to the body to an axial movement of the piping component relative to the body.

A self-adjusting tool for chamfering an end of a cylinder includes a plurality of legs. A distal segment of each of the legs extends in a forward direction of the tool and is placeable about the end of the cylinder. A central body has a rotatable shaft and a mechanism that is operable by rotation of the shaft about a shaft axis. The mechanism is operable to retract the legs inward in tandem toward the cylinder and to rotate the legs about the shaft axis when further retraction of the legs is blocked by contact with the cylinder. One or a plurality of chamfering blades are each attached to one of the legs. A cutting edge of each blade is oriented diagonally forward and inward.

The invention relates to a device (10) for the at least partial removal of the outside circumferential surface of a pipe consisting of plastic, comprising a hollow cylindrical housing (12), with a wall that surrounds a cylindrical interior space that accommodates the body in an axially moveable manner, at least one opening in the wall as well as a cutting element (74) that is associated with the opening (62) and with its cutting section projects into the interior space. To be able to remove the outside circumferential surface of the pipe in an unproblematic manner and to the desired degree, it is suggested that the cutting element (74) in a front view exhibit a disc or ring geometry and be connected to the housing (12) by a fastening element that extends in the direction of the longitudinal axis of the cutting element, whereby the cutting element can be connected to the housing in the desired position by rotating it about its longitudinal axis.

A self-adjusting tool for chamfering an end of a cylinder includes a plurality of legs. A distal segment of each of the legs extends in a forward direction of the tool and is placeable about the end of the cylinder. A central body has a rotatable shaft and a mechanism that is operable by rotation of the shaft about a shaft axis. The mechanism is operable to retract the legs inward in tandem toward the cylinder and to rotate the legs about the shaft axis when further retraction of the legs is blocked by contact with the cylinder. One or a plurality of chamfering blades are each attached to one of the legs. A cutting edge of each blade is oriented diagonally forward and inward.