Abstract: A drill for chipforming machining comprising a drill body (11), two cutting inserts (12, 13) and screws (14, 15). The cutting inserts are screwed to cutting insert sites (18, 19) in the axially forward end of the drill (10). The screws force the cutting inserts radially outwardly during tightening until a shoulder (28) at the lower side of each cutting insert abuts against a vertical support surface (22) on the drill body (11). The cutting inserts are tangentially mounted, i.e. they have holes for accomodating the screws, which terminates in the chip surfaces of the cutting inserts.

Abstract: A combined drilling and threading tool comprises a shank having a conical front portion defined by hole-cutting edges, and spirally curved ribs disposed rearwardly of the edges. A row of thread-cutting teeth is disposed along the leading edge of each rib. Each tooth includes a thread-cutting edge facing in the direction of tool rotation, and a side surface extending away from the direction of rotation. The side surface is shaped to produce axial and radial clearance relative to the thread being cut. Each tooth terminates at a location intermediate the leading and trailing edges of its associated rib.

Abstract: A drill provided with means for effecting a secondary cutting function, such as chamfering, counterboring and/or countersinking. The drill (10) comprises chip flutes, lands (14) and a cutting tip (11). Said means comprise a cylindrical tooth (12) provided with a cutting edge (13) and a pin (17). The land (14) is provided with two holes (15,18) which receive the tooth and the pin.

Abstract: In a loading crane comprising a crane post on which is pivotally mounted a crane arm or boom, and a main hydraulic piston-and-cylinder unit the lower end of which is pivotally connected to the base of the crane post and the upper end of which is pivotally connected to the inner crane arm end to effect raising and folding movements of said arm, a device, preferably in the form of an auxiliary piston-and-cylinder unit, arranged to displace the upper fulcrum of the main cylinder unit away from the crane post, past an imaginary line extending between the fulcrum pin on which the crane arm pivots relative to said post and the lower fulcrum point of the main cylinder unit.