Pafana NNZC 1616 H20 NOZ TOK.ISO 2 R — toolholder / boring bar (model ISO2R1616K20)

Pafana NNZC 1616 H20 NOZ TOK.ISO 2 R is a precision toolholder designed for internal turning and boring operations in metalworking. The boring bar accepts ISO-style cutting inserts and secures tooling for accurate internal machining on lathes and machining centers. The NNZC 1616 H20 designation indicates the toolholder’s shank size and interface geometry suitable for ISO-style insert clamping, providing a stable connection between the machine spindle and the cutting edge.

Advantages

The toolholder provides rigid clamping and repeatable positioning of inserts, which helps maintain concentricity and dimensional accuracy during boring operations. Its design reduces vibration and deflection under cutting loads, contributing to improved surface finish and tool life. Constructed for compatibility with standard ISO insert formats, the boring bar simplifies tool setup and replacement, reducing machine downtime.

Suitable for

• Internal turning and boring of steel, cast iron and non-ferrous metals
• Precision diameter finishing and undersized bore correction
• Operations on CNC lathes and manual turning centers
• Short- to medium-reach internal machining where ISO-style inserts are used

Key specifications

• Shank format and size: NNZC 1616 H20 style indicating a compact square/round shank compatible with ISO mounting interfaces
• Insert style compatibility: ISO-style turning/boring inserts
• Orientation: right-hand (R) configuration for standard turning direction
• Application: internal boring/turning toolholder for insertion of replaceable cutting tips

How to use

Mount the Pafana NNZC 1616 toolholder securely in the machine turret or tool post, ensuring correct alignment and clamping torque according to the machine manufacturer’s recommendations. Install an appropriate ISO-format insert into the pocket, tighten the clamp or screw to the specified torque, and verify insert position and clearance. Set cutting parameters—speed, feed and depth of cut—based on workpiece material and insert grade. Perform an initial test cut to confirm dimensional accuracy and adjust tool offsets in the control system as needed.

Usage recommendations

Use inserts rated for the workpiece material and select appropriate cutting parameters to minimize vibration and tool wear. Regularly inspect the toolholder and insert seat for wear or damage, and replace inserts when wear affects surface finish or dimensional control. Ensure proper coolant or lubrication is applied for the material and machining conditions to extend tool life and maintain bore quality.