IW7 IS35 IS25 IN23 IN22 IN420 MILLING INSERTS CH Rd° RNGN-Ceramic Double-Sided Round Ceramic IC Inserts for Machining Cast Iron, Nickel Based Alloys and Hardened Steel S Dimensions Tough 1  Hard Recommended Machining Data ap f Designation IC S (mm) (mm/rev) RNGN 090300T 9.52 3.18 • • 0.10-2.00 0.07-0.20 RNGN 090400T 9.52 4.76 • 0.10-2.00 0.07-0.20 RNGN 120400T 12.70 4.76 • • • 0.10-3.50 0.07-0.50 RNGN 120700 S6 (1) 12.70 7.94 • 0.10-2.00 --- RNGN 120700E 12.70 7.94 • • • 0.10-2.00 0.07-0.20 RNGN 120700E-CH (2) 12.70 7.94 • • 0.10-2.00 0.07-0.20 RNGN 120700T 12.70 7.94 • • • • • • 0.10-4.50 0.07-0.50 RNGN 120700T-CH (2) 12.70 7.94 • • 0.10-4.50 0.07-0.50 RNGN 120700TE 12.70 7.94 • • 0.10-4.50 0.07-0.50 RNGN 120700T02020 12.70 7.94 • 0.10-2.00 0.07-0.20 RNGN 150700T 15.88 7.94 • 0.10-3.00 0.07-0.20 RNGN 190700T 19.05 7.94 • 0.10-3.00 0.07-0.20 RNGN 190700TE 19.05 7.94 • • 0.10-3.00 0.07-0.20 (1) For milling nickel based superalloys; reference recommendations for milling Inconel 718: 0.12 mm/t 900-1000 m/min (2) Insert with a dimple For tools, see pages: FRN (278) Recommended Ceramic Grade and Machining Data for Milling ISO class Workpiece materialDIN/ISO 513DescriptionISCAR mat groupGrade Cutting Speed & FeedCutting speed Vc (m/min)Feed per tooth fz (mm/t)Coolant P Steel 1-13 IN23 300-600 0.05-0.15 Dry K Cast iron 15-18 IN22 700-1200 0.05-0.15 Dry IS35 400-1000 0.05-0.2 Dry S Ni or Co hightemperature alloys 33-35 IS25 600-1300 0.05-0.2 Dry IW7 1000-1500 0.05-0.2 Dry *According to VDI 3323 standard. Recommended range of depth of cut is 0.5-3 mm. The attached table provides recommended machining data. For milling is unstable conditions the limit values in the table data should be reduced by 20-30%. Edge preparation types Cutting Condition Type Figure Normal Unfavorable R0.03 E 0.1 T 20 0.1 R0.015 TE 20 - Most recommended - Second choice - May be used 531