Hertel 1000166 Left Hand Mtgn Indexable Turning Toolholder

Product Description

The HERTEL 1000166 is a left-hand MTGN-style indexable turning toolholder designed for negative rake metal cutting operations on CNC lathes and manual turning centers. Built from steel, it features a 3/4 inch square shank measuring 0.75 inches wide by 0.75 inches tall and an overall length of 4.5 inches. The toolholder operates at a negative 5-degree rake angle and accepts TN..43. series inserts with a 0.5 inch inscribed circle. It is installed by machinists and CNC operators in production turning and job shop environments.

This toolholder is suited for external turning applications where a left-hand cutting direction is required. The MTGN style uses a clamp-and-screw insert holding method, providing secure clamping rigidity during interrupted cuts and continuous turning passes. The 3-degree lead angle and 1.2 inch head length position the insert correctly for facing and turning operations on standard engine lathes and CNC turning centers. The back-of-bar to cutting edge dimension is 1.0 inch, which aids in tool setup and center-height adjustment.

Key Features

• Left-hand cutting orientation for turning operations requiring right-to-left feed direction
• Negative 5-degree rake angle suits harder workpiece materials and heavy interrupted cuts
• Clamp and screw insert holding method for secure, repeatable insert indexing
• Accepts TN..43. series inserts with 0.5 inch inscribed circle
• Steel construction provides rigidity and resistance to deflection under cutting loads
• No coolant-through feature keeps setup simple on standard non-coolant-through machines

Compatibility

Compatible with TN..432 series indexable inserts with a 0.5 inch inscribed circle. Part of the Multi-Option series toolholder line.

Installation Notes

Installation is performed by machinists on CNC or manual lathes. Secure the toolholder in the tool block or turret, ensuring the shank is fully seated and clamping screws are tightened to the machine manufacturer's specification. Verify that the cutting edge is set to the correct center height before beginning a cut. Always index or replace inserts with the spindle fully stopped and the machine in a safe, locked-out state.