Arrangement for locking a shaft to a machine member

An arrangement for locking a shaft or an axle to a machine member, said shaft being intended to carry a bearing on a central cylindrical part (8) thereof, said arrangement comprising first and second expander sleeves (9, 10) which have a conical internal form and each of which is intended to be mounted on a respective end of a corresponding configuration on the shaft, said expander sleeves (9, 10) functioning an annular wedges with the apex of the wedge facing towards the cylindrical part (8) of the shaft or axle and when tightened with the aid of fastener and tightening means (6) are caused to expand against the machine member and therewith lock the shaft thereto, and the shaft comprising an outer sleeve (1) which presents the conically shaped end-parts, and a pin (2) which is arranged coaxially with and within the outer sleeve (1) and one end of which has an outwardly curved, mushroom-headed end-part (3) having a radially extending inward surface that is intended to abut said second expander sleeve, and the other end (5) of which pin (2) carries the fastener means (6) with which the first and second expander sleeves (9, 10) are caused to expand into clamping contact width the machine member and said mushroom-headed end-part being dimensioned and arranged so as to facilitate the locking of the shaft to the machine member solely through manipulation of the fastener and tightening means positioned at one end of said pin.