TopGroove™ Catalogue Numbering System TopGroove Insert Identification System NGD2M150RK N G D 2 M 150 R K Type Insert Additional Insert Size Groove Hand Cutting Chipbreaker Definition of Insert Style Information Size Identification Size** of Insert Depth Design of Inserts N— D— M— L— Shown for K— Groove size TopGroove Deep Metric insert Left groove and Standard J or L — grooving groove width hand chamfer chip control Poly-Vee inserts in inserts P—Positive R— 0,01mm E— I — InternalC—Rightincrements.Hone onlyface groovingCirclip groovehand C— insert width Groove is nominal and circlip size chamfer Blank — Indicates inch Position pertains to groove width for F-, G-, and width insert U-style inserts, radii for R-style grooving inserts, and circlip size for groove and chamfer inserts. Dimension in 0,01mm. B — Blank Example: 3,25mm width groove or radius equals (for special forms) insert W1 “325” catalogue position number. number mm Width Tolerance: ±0,025mm unless otherwise F — Face grooving 1 2,54 specified. G — Grooving 2 3,81 P — Back turning 3 4,95 R — Full radius 4 6,98 U — Undercutting 5 9,65 (or relieving) 6 9,73 V — Poly-Vee **Omit position for TopGroove NB-style blanks. TopGroove/TopThread Threading and TopGroove/TopThread Grooving Insert Dimensions Holder Design back clearance S W1 insert size mm inch mm Inch NOTE: Holders are designed to locate insert inclined to 1 2,54 .100 2,54 .100 3° to provide back clearance down open side. 2 5,56 .219 3,81 .150 3 8,74 .344 4,95 .195 WIDIA™ TopGroove and TopThread™ tooling 4 11,51 .453 6,48 .255 technology combine to bring you the very best threading 5 17,48 .688 9,65 .380 and grooving system available in the world today. 6 11,51 .453 9,73 .383 8 7,93 .312 11,13 .438 E46 widia.com