Value Collection 375-5144 Boring Bar M35 Cobalt 3/4 Inch Shank

Product Description

The VALUE COLLECTION 375-5144 is a right-hand boring bar manufactured from M35 cobalt high-speed steel, designed for single-point internal boring operations on metalworking lathes and boring machines. It accepts a minimum bore diameter of 9/16 inches and reaches a maximum bore depth of 1-11/16 inches, making it well suited for close-tolerance hole finishing in steel, stainless, and other ferrous materials where cobalt grades outperform standard HSS tooling. The 3/4 inch shank diameter provides rigid tool holding in standard boring bar holders and turret toolposts. Overall length is 3-7/16 inches. Machinists and toolroom operators will find this bar appropriate for production and job-shop environments.

This boring bar is used in general metalworking applications where an internally bored hole must be brought to a precise diameter or finish. Typical installation scenarios include lathe turrets, manual boring mills, and CNC turning centers equipped with round-shank boring bar holders sized for 3/4 inch tooling. The M35 cobalt grade offers improved heat and wear resistance compared to M2 HSS, making it a practical choice when cutting harder alloys or running without flood coolant. Right-hand cutting direction suits conventional lathe setups where the spindle runs in the standard forward rotation.

Key Features

• M35 cobalt construction for improved heat resistance and tool life over standard HSS
• Minimum bore diameter of 9/16 inches suits close-clearance internal boring work
• Maximum bore depth of 1-11/16 inches for moderate-depth holes without excessive overhang
• 3/4 inch shank diameter fits standard round-shank boring bar holders and turret toolposts
• Right-hand cutting direction for conventional forward-spindle lathe operation
• Compact 3-7/16 inch overall length promotes rigidity and reduces chatter risk

Compatibility

Designed as an OEM-style replacement or standard addition for metalworking lathes and boring machines that accept 3/4 inch round-shank boring bar tooling with right-hand cutting direction.

Installation Notes

Installation should be performed by a qualified machinist with the machine powered off and the spindle fully stopped before any tooling change. The shank should be clamped securely in a properly sized boring bar holder to minimize overhang and reduce the risk of chatter or tool deflection. Verify cutting edge height is set on centerline before beginning a boring pass. Always follow the machine manufacturer guidelines and applicable shop safety procedures when setting up and operating boring tools.