Accupro ACC-HB035125 Helical Boring Bar Solid Carbide

Product Description

The ACCUPRO ACC-HB035125 is a helical boring bar machined from submicron-grade solid carbide for small-diameter internal boring operations. It features a right-hand cutting direction and a bright finish coating with no additional surface treatment that would alter the dimensional tolerances critical at this scale. The minimum bore diameter is 0.035 inches, the maximum bore depth is 0.125 inches, the shank diameter is 0.125 inches, and the overall length is 1.5 inches. This bar is designed for machinists and tooling technicians working on precision components where tight bore tolerances and a rigid, vibration-resistant tool body are required.

The ACC-HB035125 is suited for small-bore applications in CNC machining centers, manual lathes, and mill-turn equipment. Its compact geometry makes it appropriate for tight clearance bores in medical components, instrument housings, watch parts, hydraulic valve bodies, and similar precision work. The submicron carbide grade provides the hardness and wear resistance needed to maintain size and surface finish across extended production runs in ferrous and non-ferrous materials.

Key Features

• Submicron solid carbide construction for high rigidity and wear resistance in small-bore work
• Helical boring bar geometry supports chip evacuation in shallow blind bores
• Right-hand cutting direction for standard CNC and manual lathe setups
• Bright finish coating — no added coating thickness to affect dimensional accuracy
• 0.035-inch minimum bore diameter enables entry into very tight internal features
• 1.5-inch overall length with 0.125-inch shank fits standard small-bore tool holders

Compatibility

Designed for use in tool holders and boring systems accepting a 0.125-inch shank diameter. Suitable for CNC lathes, machining centers, and mill-turn platforms configured for small-diameter internal boring operations.

Installation Notes

Install and remove this boring bar with the machine spindle fully stopped and locked out per your shop lockout/tagout procedure. Ensure the shank is fully seated and clamped in the tool holder to the holder manufacturer's specification before starting the spindle. At this diameter, even minor runout or insufficient clamping force will degrade bore quality and can fracture the carbide shank. Consult the tool holder manufacturer's documentation for appropriate clamping torque and projection length guidelines.