A holding device (58) comprising:
- a clamping sleeve adaptor (60), extending along a sleeve central axis (B), and an alignment indicator (76) attached to the clamping sleeve adaptor (60);
- wherein:
- the clamping sleeve adaptor (60) comprises:
- a radially outward facing sleeve peripheral surface (62) extending circumferentially about the sleeve central axis (B), the sleeve peripheral surface (62) intersecting, and forming a boundary of, a forward sleeve end surface (64a) at a forward sleeve end (61a) of the clamping sleeve adaptor (60);
- and
- a clamping recess (68), extending along a recess central axis (C), the clamping recess (68) comprising a recess peripheral surface (70) which extends circumferentially about the recess central axis (C) and which opens out to the forward sleeve end surface (64a);
- and
- the alignment indicator (76) comprises an alignment indicator housing (78) and an electric circuit (80) located therewithin, the electric circuit (80) comprising:
- a power supply (82);
- an indicator (84) having an on state configured to indicate a shank portion of a cutting member being received and rotationally aligned in the clamping recess and an off state;
- and
- an electric switch (88) having a closed configuration corresponding to the on state of the indicator (84) and an open configuration corresponding to the off state of the indicator (84), the electric switch (88) comprising two spaced apart conductive switch members (90a, 90b) protruding from and through the alignment indicator housing (78) towards the recess central axis (C), each of the two switch members (90a, 90b) having a switch member contact surface (92) which is formed on a part of the switch member (90a, 90b) that protrudes from the alignment indicator housing (78), in the closed configuration of the electric switch (88) a first one of the switch member contact surfaces is configured to contact the shank portion received in the clamping recess at a first position and a second one of the switch member contact surfaces is configured to contact the shank portion received in the clamping recess at a second position such that the switch member contact surfaces are in electrically conducive communication with one another through the shank portion, in the open configuration of the electric switch (88) the first one of the switch member contact surfaces is configured to contact the shank portion received in the clamping recess at a third position and the second one of the switch member contact surfaces is configured to contact the shank portion received in the clamping recess at a fourth position such that the switch member contact surfaces are not in electrical communication with one another through the shank portion.