Parlec 20-043 Tapping Adapter 7/16 in Numertap 200

Product Description

The PARLEC 20-043 is a quick-change tapping adapter designed for use with 7/16 inch taps in CNC machining and production tapping applications. Part of the NUMERTAP 200 series, this Size 2 adapter features a tap shank diameter of 0.323 inches and a tap square size of 0.242 inches. The quick-change interface allows operators to swap taps rapidly without removing the holder from the spindle, reducing cycle time in high-volume threading operations. It is installed and serviced by machinists and CNC setup technicians in job shop and production environments.

This adapter is suited for production tapping on CNC machining centers and tapping machines where repeatable tap positioning and fast changeover are required. The NUMERTAP 200 series is a widely used quick-change tapping system, and the 20-043 fits within that modular tooling family for 7/16 inch tap sizes. It is appropriate for ferrous and non-ferrous materials where controlled-depth or through-hole tapping is performed. Coolant-through is not supported on this adapter.

Key Features

• Quick-change interface enables fast tap replacement without removing the holder from the spindle
• Tap shank diameter of 0.323 inches and tap square size of 0.242 inches for secure tap engagement
• Flange diameter of 1.890 inches provides stable seating in the toolholder body
• Projection of 0.430 inches allows controlled reach in tight clearance applications
• Outside shank diameter of 1.220 inches for consistent fitment within the NUMERTAP 200 system
• No coolant-through - suitable for applications where flood or external coolant delivery is used

Compatibility

Designed for use within the PARLEC NUMERTAP 200 series quick-change tapping system, accepting 7/16 inch taps at a Size 2 adapter designation. Verify system compatibility with the corresponding NUMERTAP 200 toolholder body before ordering.

Installation Notes

Installation is performed by a qualified machinist or CNC tooling technician. Power down and lock out the machine spindle before inserting or removing the tapping adapter. Ensure the tap shank and square dimensions match the adapter before seating to avoid damage to the quick-change mechanism. Follow the toolholder manufacturer guidelines and applicable shop safety procedures during setup.