Hertel 7000027 Indexable Boring Bar 1.2in Min Bore Rh

Product Description

The HERTEL 7000027 is a right-hand A-MWLN indexable boring bar designed for internal turning operations on CNC lathes and boring mills. Built from steel with a 1.0-inch shank diameter and a 12-inch overall length, this bar accepts WN-style inserts held by screw or clamp and features a through-coolant port for continuous chip evacuation and thermal control at the cutting zone. The negative rake geometry and -5 degree lead angle suit medium to heavy interrupted and continuous cuts in steel, cast iron, and similar ferrous workpiece materials. Machinists and tool-and-die professionals rely on this style of bar where rigidity and repeatable insert indexing are critical to bore tolerance.

This boring bar is suited for production and job-shop environments where precise internal diameter work is required. The 1.2-inch minimum bore diameter and 12-inch OAL make it appropriate for deep-bore applications on parts with sufficient clearance for the 1.0-inch shank. The through-coolant design, fed via a 1/4-18 NPT inlet, supports high-speed machining cycles where flood coolant alone cannot reach the cutting edge. This bar is a single-purpose toolholder and is not configured for multi-use applications.

Key Features

• 1.2-inch minimum bore diameter for medium-to-large internal turning work
• 12-inch overall length supports deep-bore reach with a rigid 1.0-inch steel shank
• Through-coolant via 1/4-18 NPT port for effective chip flushing and heat management
• Accepts WN-style indexable inserts, 3/8-inch inscribed circle, 3/16-inch thickness
• Negative rake at -5 degree lead angle for stable cutting action on ferrous materials
• Screw or clamp insert holding method for secure, repeatable edge positioning

Compatibility

Designed for use with WN-style indexable inserts with a 3/8-inch inscribed circle and 3/16-inch thickness, following A-MWLN toolholder conventions. Also referenced under manufacturer number A16MWLNR/L3.

Installation Notes

Installation is performed by qualified machinists following shop-standard toolsetting procedures. Ensure the machine spindle and coolant supply are fully de-energized and depressurized before mounting or removing the boring bar. Confirm the coolant port thread is compatible with the machine coolant fitting before connecting the 1/4-18 NPT line. Torque all insert-clamping hardware to toolholder manufacturer specifications using the correct torque key for the insert-holding style in use.