An indexable parting blade comprising: opposing blade first and second sides (42A, 42B); a blade peripheral edge connecting the blade first and second sides (42A, 42B); a central index axis AI extending through the center of the blade first and second sides (42A, 42B); first, second and third insert pockets (18A, 18B, 18C) located along the blade peripheral edge; and first, second and third coolant channels (56, 58, 60); the first coolant channel comprising a first inlet, at least one first outlet opening out to the first insert pocket, and a first channel portion extending between the first inlet and the at least one first outlet; the second coolant channel comprising a second inlet, at least one second outlet opening out to the second insert pocket, and a second channel portion extending between the second inlet and the at least one second outlet; and the third coolant channel comprising a third inlet, at least one third outlet opening out to the third insert pocket, and a third channel portion extending between the third inlet and the at least one third outlet; characterized in that the at least one first outlet comprises a first rake outlet opening (56B1) out to a rake side of the first insert pocket and a first relief outlet opening (56B2) out to a relief side of the first insert pocket; and the first inlet is located further from a furthermost point of the first insert pocket than at least one of (a) the second inlet and (b) the central index axis AI. opposing blade first and second sides (42A, 42B); a blade peripheral edge connecting the blade first and second sides (42A, 42B); a central index axis AI extending through the center of the blade first and second sides (42A, 42B); first, second and third insert pockets (18A, 18B, 18C) located along the blade peripheral edge; and first, second and third coolant channels (56, 58, 60); the first coolant channel comprising a first inlet, at least one first outlet opening out to the first insert pocket, and a first channel portion extending between the first inlet and the at least one first outlet; the second coolant channel comprising a second inlet, at least one second outlet opening out to the second insert pocket, and a second channel portion extending between the second inlet and the at least one second outlet; and the third coolant channel comprising a third inlet, at least one third outlet opening out to the third insert pocket, and a third channel portion extending between the third inlet and the at least one third outlet; the first coolant channel comprising a first inlet, at least one first outlet opening out to the first insert pocket, and a first channel portion extending between the first inlet and the at least one first outlet; the second coolant channel comprising a second inlet, at least one second outlet opening out to the second insert pocket, and a second channel portion extending between the second inlet and the at least one second outlet; and the third coolant channel comprising a third inlet, at least one third outlet opening out to the third insert pocket, and a third channel portion extending between the third inlet and the at least one third outlet; the at least one first outlet comprises a first rake outlet opening (56B1) out to a rake side of the first insert pocket and a first relief outlet opening (56B2) out to a relief side of the first insert pocket; and the first inlet is located further from a furthermost point of the first insert pocket than at least one of (a) the second inlet and (b) the central index axis AI.