Tapping Head, Type: 20/3

With built-in reversing gears for automatic return. After reaching the thread depth, the unit automatically reverses by raising the machine spindle low-wear ball system!. Accelerated return approx. factor 1.8xnmax. Length compensation in tension. With anti-rotation arm. Maintenance-free For cutting right, and left-hand threads. With quick-change collet system. Application: For automatic tapping on non-reversing machines with manual feed. For tapping through holes with collets No. 335430 and blind holes with inserts No. 335620. Optional extras: For quick-change tapping collets see: No. 335420, 335430 without safety clutch, No. 335610, 335620 with safety clutch. Thread range: M8 M20 maximum speed, advance: 500 min-1 Length compensation in tension: 16.5 mm Length from the machine spindle: 170 mm L1: 86 mm Disengagement travel B: 8 mm