Value Collection 375-5148 Boring Bar M35 Cobalt 3/4 in Shank

Product Description

The VALUE COLLECTION 375-5148 is a right-hand boring bar designed for precision internal turning and boring operations on a lathe or boring machine. Constructed from M35 cobalt high-speed steel, this bar delivers strong heat and wear resistance, making it well suited for cutting harder materials at sustained feed rates. It accepts a minimum bore diameter of 9/16 inches and reaches a maximum bore depth of 2-13/16 inches, with a 3/4 inch shank diameter and an overall length of 4-9/16 inches. Machinists and tool-and-die professionals rely on this type of bar for tight-tolerance internal features in production and job-shop environments.

This boring bar is intended for use on manual lathes, CNC turning centers, and dedicated boring machines where right-hand cutting direction is required. It is well suited for moderate-depth internal bores in steel, stainless steel, cast iron, and other ferrous materials where cobalt tooling outperforms standard high-speed steel. Typical applications include enlarging existing holes, finishing bored diameters, and producing close-tolerance bores in machined components across metalworking, maintenance, and fabrication shops.

Key Features

• M35 cobalt construction provides elevated red-hardness and extended tool life compared to standard HSS
• Right-hand cutting direction for standard lathe and boring machine setups
• Minimum bore diameter of 9/16 inches suits a wide range of internal bore work
• Maximum bore depth of 2-13/16 inches handles moderate-depth features without excessive overhang
• 3/4 inch shank diameter for secure tool-post or boring-head clamping
• Compact 4-9/16 inch overall length reduces deflection risk in typical setups

Compatibility

Designed as an OEM-style replacement-style boring bar compatible with standard 3/4 inch tool-post holders and boring heads used on manual and CNC lathes that accept right-hand tooling.

Installation Notes

This boring bar is installed by machinists using a qualified tool-post holder or boring head that matches the 3/4 inch shank diameter. Power down and lock out the machine spindle before seating or adjusting the bar. Ensure the bar is clamped securely with minimal overhang beyond the holder to reduce deflection and chatter. Follow shop safety standards and machine-tool manufacturer guidelines when setting tool height and feed parameters.