Seco 02829668 Indexable Boring Bar 0.512 in Bore 3/8 in Shank

Product Description

The SECO 02829668 is a steel-shank indexable boring bar designed for precision boring and turning operations on CNC and manual lathes. Built with a 3/8-inch shank diameter and a minimum bore diameter of 0.512 inches, this bar handles tight-tolerance internal machining where rigidity and accurate insert positioning are critical. The screw-type insert clamping method secures a triangular insert with a negative rake angle and a 90-degree lead angle, producing clean, controlled cuts. Coolant-through capability delivers cutting fluid directly to the insert tip, extending tool life and improving chip evacuation in deep-bore applications. Overall length is 6 inches.

This boring bar suits job shops, production machinists, and toolroom operators running internal diameter work on steel, cast iron, and similar materials. The 90-degree lead angle makes it effective for boring straight walls and for turning shoulders. The screw-type clamping system allows fast insert indexing without removing the bar from the holder, reducing machine downtime. Compatible insert size code is 21.5, and the insert shape is triangular with a 0-degree rake angle, giving machinists predictable chip control across a range of feed and speed combinations.

Key Features

• Minimum bore diameter of 0.512 inches for access to small internal diameters
• 3/8-inch steel shank for rigidity in compact boring setups
• 90-degree lead angle supports straight-wall boring and shoulder turning
• Screw-type insert holding method for secure clamping and quick indexing
• Coolant-through design improves chip evacuation and insert life in deep bores
• Negative rake, triangular insert geometry provides predictable cutting forces

Compatibility

Designed for use with compatible size-21.5 triangular inserts with negative rake. Suitable for boring and turning applications as an indexable tooling solution for CNC lathes and manual turning centers.

Installation Notes

Installation is performed by qualified machinists or tooling setup personnel. Power down and lock out the machine spindle before mounting or changing the boring bar or insert. Secure the shank in the tool holder to the full recommended engagement depth to minimize overhang and chatter. Follow the machine manufacturer's tooling specifications and safe operating procedures when setting cutting parameters.