A spindle for a power tool, the spindle comprising: a first spindle member having at least one first abutment portion adjacent a first end thereof; a second spindle member for supporting a working member of the power tool adjacent a first end thereof for rotation with said second spindle member about an axis, wherein the at least one said first abutment portion comprises a rim extending inwardly towards said axis, which defines an aperture for slidably receiving the second spindle member, wherein said second spindle member is adapted to extend through said aperture and has at least one second abutment portion adjacent a second end thereof which comprises a rim extending outwardly of said axis and which cooperates with the inwardly extending rim of the at least one said first abutment portion of said first spindle member to prevent removal of said second spindle member from said aperture of said first end of said first spindle member in a first direction; biasing means arranged between the inwardly extended rim of the first abutment portion and the outwardly extending rim of the second abutment portion for urging said second spindle member in a second direction, opposite to said first direction, relative to said first spindle member; locking means (414, 416) for preventing removal of said second spindle member from said first end of said first spindle member in the second direction; wherein that said locking means (414, 416) comprises at least one removable member mounted to said second spindle member on a side of the inwardly extended rim of the said first abutment portion opposite to said biasing means and which prevents axial movement of the first spindle member relative to the second spindle member in the first direction; characterised in that said aperture is a splined aperture for slidably and non-rotatably receiving the second spindle member, in that said biasing means comprises at least one O-ring and in that said locking means (414, 416) further maintains the at least one O-ring under compression to prevent axial movement at the second spindle member relative to the first spindle member. a first spindle member having at least one first abutment portion adjacent a first end thereof; a second spindle member for supporting a working member of the power tool adjacent a first end thereof for rotation with said second spindle member about an axis, wherein the at least one said first abutment portion comprises a rim extending inwardly towards said axis, which defines an aperture for slidably receiving the second spindle member, wherein said second spindle member is adapted to extend through said aperture and has at least one second abutment portion adjacent a second end thereof which comprises a rim extending outwardly of said axis and which cooperates with the inwardly extending rim of the at least one said first abutment portion of said first spindle member to prevent removal of said second spindle member from said aperture of said first end of said first spindle member in a first direction; biasing means arranged between the inwardly extended rim of the first abutment portion and the outwardly extending rim of the second abutment portion for urging said second spindle member in a second direction, opposite to said first direction, relative to said first spindle member; locking means (414, 416) for preventing removal of said second spindle member from said first end of said first spindle member in the second direction; wherein that said locking means (414, 416) comprises at least one removable member mounted to said second spindle member on a side of the inwardly extended rim of the said first abutment portion opposite to said biasing means and which prevents axial movement of the first spindle member relative to the second spindle member in the first direction; characterised in that said aperture is a splined aperture for slidably and non-rotatably receiving the second spindle member, in that said biasing means comprises at least one O-ring and in that said locking means (414, 416) further maintains the at least one O-ring under compression to prevent axial movement at the second spindle member relative to the first spindle member.