TOOLTALK Toolholder Overview Toolholders come in a variety of shapes and sizes. Like turning inserts, there is a simple nomenclature of letters and numbers that allow for easy identification of the best toolholder for each application. Use this chart as a reference for the identification system’s eight factors. TURNING TOOLS: External, End Turning Toolholders INSERT MOUNTING METHOD INSERT SHAPE INSERT CLEARANCE ANGLE C Clamp Lock M Multi Lock 80° C 55° K 55° D R 5° B 7° C 15° D P Lever Lock S Screw Lock 90° S 35° V 60° T 80° W 20° E 0° N 11° P HAND OF TOOLS L - Left Hand N - Neutral R - Right Hand See reverse side for toolholder size, insert size and the qualified tool length. MC L NR1 6 4 D TOOLHOLDER STYLE A B C D E F G H 90° J 75° K 90° L 45° M 60° N 90° O 90° P 107°30' Q 93° R 75° S 95° T 50° U 63° V 117°30' W 62°30' X 107°30' 75° 45° 60° 93° 72°30' 60° 120° Looking for Metalworking Tools? Contact Fastenal at 844.365.8665 or cuttingtoolsupport@fastenal.com Go to fastenal.com/metalworking for previous Tool Talks
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