Accupro ACC-BBL360900 Boring Bar Left Hand Solid Carbide

Product Description

The ACCUPRO ACC-BBL360900 is a solid carbide boring bar designed for internal diameter machining operations requiring precise, left-hand cutting direction. Built from submicron-grade carbide with a bright finish coating, this bar delivers consistent dimensional accuracy in bores starting at 0.36 inches minimum diameter with a maximum bore depth of 0.9 inches. The 3/8-inch shank diameter and 2.5-inch overall length make it well suited for compact tooling setups on CNC lathes and manual turning centers. Machinists and toolroom professionals install this type of bar when tight bore tolerances and surface finish requirements demand a rigid, high-hardness cutting tool over high-speed steel alternatives.

This boring bar is appropriate for light to medium internal turning and finishing passes on a range of materials including steel, cast iron, aluminum, and non-ferrous alloys. Its submicron carbide grade supports higher cutting speeds than standard carbide grades while maintaining edge integrity in interrupted or continuous cut applications. The left-hand cut orientation makes it suitable for specific bore configurations where conventional right-hand bars are not practical, such as back-boring operations or certain gang-tooling arrangements on CNC turning centers.

Key Features

• Submicron-grade solid carbide construction for enhanced hardness and edge retention
• Left-hand cutting direction for back-boring and specialized tooling setups
• 0.36 inches minimum bore diameter supports small-bore finish work
• 0.9 inches maximum bore depth suitable for shallow-to-medium bore applications
• Bright finish coating with no additional coating buildup affecting shank tolerance
• 3/8-inch shank diameter compatible with standard boring bar holders and turret tooling

Compatibility

Designed as an OEM-style replacement or direct tooling selection for standard 3/8-inch boring bar holder blocks used on CNC and manual lathes requiring left-hand internal turning capability.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. The shank should be clamped securely in a matched boring bar holder, with overhang minimized to reduce chatter and deflection. Machine spindle and all axes must be at a full stop and the control placed in an appropriate safe state before inserting or adjusting tooling. Verify cutting direction setup against the programmed tool path before initiating a bore cycle to confirm left-hand orientation matches the intended operation.