Series Overview & Features

This series specializes in small bore machining, offering a range of head (bore) diameters and shank sizes to tackle a variety of internal work.

• Small Bore Expertise: Specifically designed for internal diameters as small as 5mm, overcoming the limitations of standard boring bars.
• Screw-Down Clamping: Secure and rigid clamping mechanism for C-type inserts, ensuring stability in internal cuts where tool deflection is a concern.
• Modular & Solid Designs: Choose from modular heads (e.g., S06K-STUBR06-A12) for flexibility or solid one-piece bars (e.g., S06H-STUBR06) for maximum rigidity in deep reach applications.
• Right & Left Hand Options: The STUBR designation indicates a Right-Hand cutting tool for standard internal turning, while STUBL is for Left-Hand operations.
• Precision Ground: High-quality manufacturing ensures minimal runout and accurate bore geometry.

Product Series Specifications

Our comprehensive range allows you to select the perfect tool based on your required bore diameter and machine holder capacity.

Note: "A08", "A10", etc., in the model number typically denote the shank diameter.

Applications & Technical Guidance

• Primary Work Materials: Carbon steel, alloy steel, stainless steel, cast iron, and aluminum.
• Common Operations: Small diameter internal boring, semi-finishing, finishing, step boring, and internal grooving.
• How to Choose:
  1. Bore Diameter: Select a tool with a head diameter smaller than your finished bore size.
  2. Shank Size: Choose the largest shank that fits your machine's tool holder for maximum stability.
  3. Reach / Depth: For deep holes, solid bars (S__H) offer better rigidity. For flexibility, modular heads (S__K) are ideal.
  4. Cutting Direction: STUBR for standard operations (clockwise spindle); STUBL for reverse/left-hand setups.

Why Choose BEYOND STUBR/STUBL Boring Bars?

• Solve Accessibility Problems: Reach into small, deep internal features that standard tooling cannot.
• Superior Rigidity: The screw-down clamp and robust design minimize deflection, preventing chatter and ensuring good surface finish.
• Extended Tool Life: Stable clamping reduces insert micro-movement, leading to more consistent performance and longer insert life.
• Complete Size Range: From 5mm up, we have the tool to meet your specific small-bore machining challenge.