® Thread Turning Inserts Partial Profile 55° EXTERNAL INTERNAL L I.C. Pitch Range Ordering Code Ordering Code X Y in mm TPI Right Hand Left Hand Right Hand Left Hand 6 5/32 0.5 - 1.25 48 - 20 ULTRA MINIATURE  *06 IR A55 *06 IL A55 0.5 0.6 8 3/16 0.5 - 1.5 48 - 16 MINIATURE  *08 IR A55 *08 IL A55 0.6 0.7 8U 3/16U 1.75 - 2.0 14 - 11 “U” MINIATURE  *08U IR/L U55 0.9 4.0 11 1/4 0.5 - 1.5 48 - 16 11 ER A55 11 EL A55 11 IR A55 11 IL A55 0.8 0.9 16 3/8 0.5 - 1.5 48 - 16 16 ER A55 16 EL A55 16 IR A55 16 IL A55 0.8 0.9 16 3/8 1.75 - 3.0 14 -8 16 ER G55 16 EL G55 16 IR G55 16 IL G55 1.2 1.7 16 3/8 0.5 - 3.0 48 -8 16 ER AG55 16 EL AG55 16 IR AG55 16 IL AG55 1.2 1.7 22 1/2 3.5 - 5.0 7 -5 22 ER N55 22 EL N55 22 IR N55 22 IL N55 1.7 2.5 22U 1/2U 5.5 - 8.0 4.5 - 3.25 22U E/I/R/L U55 0.9 11.0 27 5/8 5.5 - 6.0 4.5 - 4 27 ER Q55 27 EL Q55 27 IR Q55 27 IL Q55 2.0 2.9 27U 5/8U 6.5 - 9.0 4 - 2.75 27U E/I/R/L U55 1.2 13.7 * Available only in BXC and BMA grades Order example: 16 ER G55 MXC For small bore threading see page A06-12 Type B Ground profile with sintered chip-breaker EXTERNAL INTERNAL L I.C. Pitch Range Ordering Code Ordering Code X Y in mm TPI Right Hand Right Hand 16 3/8 1.75 - 3.0 14 - 8 16 ER B G55 16 IR B G55 1.2 1.7 16 3/8 0.5 - 3.0 48 - 8 16 ER B AG55 16 IR B AG55 1.2 1.7 Order example: 16 ER B G55 BMA For carbide grade and cutting speed see page A04-2 and 3 A01-5