Kennametal 1094825 Indexable Boring Bar Left Hand 8in

Product Description

The KENNAMETAL 1094825 is a left-hand indexable boring bar built for precision internal turning operations on CNC and manual lathes. Part of the Kennametal Top Notch series, it accepts N-style inserts held in place by a clamp-style retention method for secure, repeatable edge positioning. The bar features a 1/2-inch shank diameter and an overall length of 8 inches, allowing it to reach bores with a minimum diameter of 0.730 inches (18.54 mm). A built-in coolant-through passage with a 1/16-27 NPT thread connection supports chip evacuation and tool life in deep-bore applications. Licensed machinists and toolroom technicians install this bar in production and job-shop environments where consistent bore geometry is required.

This boring bar is suited for light to medium internal turning work where left-hand cut geometry is required. The Top Notch series design positions the cutting edge at a 3-degree lead angle, which influences chip formation and surface finish in finish-bore passes. The center-to-cutting-edge dimension of 0.437 inches is useful for calculating bore clearances during setup. The coolant-through capability makes it a practical choice for harder materials or deeper bores where flood coolant alone does not adequately reach the cutting zone. It is a single-use toolholder configuration and is not designed as a multi-use convertible tool.

Key Features

• Left-hand cut orientation for climb-boring and specific machine configurations
• Clamp-style insert retention for rigid, repeatable N-style insert seating
• Coolant-through port threaded 1/16-27 NPT for internal coolant delivery
• 0.730 inches (18.54 mm) minimum bore diameter supports tight-bore applications
• 3-degree lead angle geometry influences chip flow and cutting forces
• Top Notch series platform with consistent insert indexing and changeover

Compatibility

Designed for use with N-style (Top Notch) inserts. Compatible insert style is designated N. in the Kennametal Top Notch series. Specific compatible insert part numbers were not provided in the available product data; consult Kennametal tooling guides or the insert compatibility chart for this holder style.

Installation Notes

Installation is performed by machining technicians or toolroom professionals. Before mounting or indexing inserts, power down the machine and engage all axis locks per standard lockout/tagout procedures. Use the appropriate Torx or hex key as specified by the insert clamp design when seating N-style inserts — do not overtighten by feel alone; refer to the Kennametal torque specification card for the clamp screw. Confirm shank-to-bore clearance and overhang length against your machine tool manufacturer guidelines before beginning cuts.