Kennametal 3331036 Indexable Boring Bar Left Hand L-sclp

Product Description

The KENNAMETAL 3331036 is a left-hand indexable boring bar designed for precision internal turning operations on CNC lathes and boring machines. Built from heavy metal for rigidity and vibration dampening, it accepts CP-style inserts held in place by a screw-clamp method with a neutral rake angle. The bar features a minimum bore diameter of 0.415 inches, a maximum bore depth of 0.76 inches, and an overall length of 5.995 inches. A through-coolant channel with a 0.094-inch coolant hole diameter keeps the cutting zone clear and extends insert life during deep or interrupted cuts. Machinists and toolroom technicians working to tight tolerances on small-bore applications will find this bar well suited to the task.

This boring bar is intended for small-diameter internal machining in production and jobshop environments. The L-SCLP toolholder style and -5 degree lead angle make it appropriate for close-to-shoulder boring passes where clearance is limited. The 0.313-inch shank diameter fits standard small-bore tool blocks and turrets. The left-hand configuration suits machines with reverse-spindle capability or specific turret orientations where a right-hand bar would not clear. It is sold individually and is a direct fit for setups requiring CP-style insert geometry with a 1/4-inch inscribed circle and 3/32-inch insert thickness.

Key Features

• Left-hand orientation for reverse-spindle or dedicated turret positions
• Through-coolant capability via 0.094-inch internal coolant channel
• Heavy metal construction dampens vibration in small-bore applications
• Screw-clamp insert holding method for secure, repeatable insert seating
• Neutral rake angle suitable for a broad range of workpiece materials
• Center-to-cutting-edge dimension of 0.219 inches for precise tool offset entry

Compatibility

Designed for use with CP-style indexable inserts with a 1/4-inch inscribed circle and 3/32-inch thickness. Compatible with tool blocks and turrets accepting a 0.313-inch round shank. Specific machine compatibility depends on turret configuration and setup requirements.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician with the machine powered down and the spindle locked before mounting or adjusting the boring bar. Secure the shank fully within the tool block to the recommended overhang for the bore depth being cut, minimizing unsupported length to reduce deflection. Verify insert seating and screw torque per the insert manufacturer's guidelines before taking a cut. When connecting through-coolant, confirm the coolant supply line is compatible with the machine's internal coolant port pressure rating.