Coventry Type Chasers

Description Quality chasers for tap heads provide extra strength for cutting threads in stationary or rotary applications on automatic screw machines, drill presses, turret lathes, hand screw machines, tapping machines and special machines. Depending upon application details, chasers can be produced to cut straight or tapered threads in both right hand and left hand.                                                                                                            CAPACITY CHART UNIFIED NATIONAL ( UN ) METRIC ( ISO ) TAP HEAD # PER SET STD.PROJ. HEIGHT COARSEST PITCH DIAMETER CAPACITY COARSEST PITCH DIAMETER CAPACITY     M-27     4 0.215 12   1.062 – 1.187   2.0   27 – 30   M-30 4 0.215 11 1.187 – 1.375 2.0 30 – 35 M-35 4 0.165 11 1.375 – 1.625 2.0 35 – 42 M-42 4 0.165 10 1.625 – 2.000 2.5 42 – 51 M-50 4 0.215 10 2.000 – 2.375 2.5 51 – 60 M-60 4 0.215 10 2.375 – 2.750 2.5 60 – 70 M-70 6 0.350 8 2.750 – 3.250 3.0 70 – 83 M-83 6 0.350 8 3.250 – 3.750 3.0 83 – 95