SEC-Grooving Tools GND Type This form is applicable to Japan domestic market only Applicable holder (edge width 2 to 8mm)  External machining: GNDS Type (→F24), GNDM Type (→F22, F26), GNDMS Type (→F26), GNDL Type (→F22, F28), GNDLS Type (→F28)  Boring: GNDI Type (→F38) * Note that GNDIS type cannot be used because its insert shape is not compatible.  Facing: GNDF (→F33), GNDFS Type (→F35) Special inserts with a ground chipbreaker (customized edge width and Company Name / Contact Information (Phone, fax, address, etc.) nose radius) are available. To order, make a copy of this form, ll it out (circle your preferences and specify dimensions), and send it to your nearest Sumitomo Electric Hardmetal dealer or distributor. For grooving inserts with a shape, edge length or grade other than those listed below, contact your nearest Sumitomo Electric Hardmetal sales office (see the contact information at the end of this catalog. Shape Item Description Edge width CW (mm) Nose radius RER (mm) RER CW REL F Nose radius REL (mm) Grade AC530U・AC520U・EH520・H10・KH03 Grooving CDX (Select from the list on the right.)*1 Tools Depth of groove CDX (mm)*2 Grooving *1 Grade H10 has sharp edge. Cut-Off *2 Specify a chipbreaker width depending on the depth of groove (CDX). The actual depth of groove shall be equal to or less than the maximum depth of groove speci ed for standard holders. Threading Notes 1. The applicable standard holder varies depending on the edge width. See the table on the right for edge width and nose radius for facing. (If larger nose radius is required for facing, the holder may be modi ed to prevent interference with the work material.) Edge Width CW Applicable Maximum Nose Radius (RER, REL) 2. The maximum nose radius for external/internal machining is equal to a half of the (Nominal) Standard Holder for Grooving (Standard Holder) edge width. 2.00 to 2.59mm 2mm wide holder 0.2mm 3. The tolerance of edge width CW shall be ±0.025mm. 2.60 to 3.59mm 3mm wide holder 0.4mm 4. The dimension WF of each holder is calculated using the formula below, where CWS stands for the standard insert edge width for the applicable holder. 3.60 to 4.59mm 4mm wide holder (Dimension WF of a standard holder) + (WF - CWS) / 2 4.60 to 5.59mm 5mm wide holder 0.8mm 5. Polishless inserts are also available depending on the edge width in inch. 5.60 to 6.59mm 6mm wide holder Contact your nearest Sumitomo Electric Hardmetal sales office for more information. F40