Value Collection 375-5068 Boring Bar M35 Cobalt Right Hand

Product Description

The VALUE COLLECTION 375-5068 is a right-hand boring bar designed for precision internal boring operations on lathes and boring mills. Constructed from M35 cobalt high-speed steel, it offers improved heat and wear resistance compared to standard M2 HSS tooling, making it suitable for harder workpiece materials and interrupted cuts. The bar accepts a minimum bore diameter of 0.4375 inches (7/16 inches) and reaches a maximum bore depth of 2.1875 inches (2-3/16 inches). Overall length is 3-9/16 inches with a 1/2 inch shank diameter. Machinists and toolroom operators typically install and use this bar in manual or CNC turning setups where consistent bore geometry is required.

This boring bar is suited for small-diameter internal turning work in job shops, production machining environments, and toolroom applications. The 1/2 inch shank diameter fits standard boring bar holders and quick-change toolpost systems commonly found on engine lathes and turret lathes. The right-hand cutting direction means material is removed as the tool feeds toward the headstock. It is appropriate for use on ferrous and non-ferrous materials where a cobalt-grade tool provides adequate edge retention at moderate cutting speeds.

Key Features

• M35 cobalt construction for increased hardness and heat resistance over standard HSS
• Minimum bore diameter of 7/16 inches (0.4375 inches) for small-bore applications
• Maximum bore depth of 2-3/16 inches (2.1875 inches)
• 1/2 inch shank diameter for compatibility with standard boring bar holders
• Right-hand cutting direction for conventional lathe feed toward the headstock
• Overall length of 3-9/16 inches for compact toolpost clearance

Compatibility

Designed to fit standard 1/2 inch boring bar holders and quick-change toolpost systems used on manual and CNC engine lathes.

Installation Notes

Installation is performed by a machinist or toolroom technician. Power down and lock out the lathe spindle before seating the bar in the holder. Ensure the cutting edge is set on or slightly above center height to prevent rubbing and poor surface finish. Verify shank clamp torque is sufficient to prevent bar deflection during the cut, and keep overhang to the minimum required for the bore depth to reduce chatter.