BEYOND STUPR/L Screw-On Boring Bars (Steel Shank, TPGT Insert Compatible)

The BEYOND STUPR/L boring bar series is a high-precision steel-shank turning tool designed for internal turning and boring applications. Featuring a rigid screw-on clamping structure (S Type), 93° cutting edge angle (U), triangular insert shape (T), and compatibility with TPGT inserts matching the final two digits of the model. Ideal for high-accuracy CNC machining.

ISO Code Structure Interpretation

Compatible Inserts

All models use TPGT + last two digits (e.g., TPGT0802, TPGT0902, TPGT1103). Supports finishing and semi-finishing of steel, stainless steel, cast iron, and non-ferrous materials.

Clamping Method: Screw-On (S Type)

• Strong insert retention
• Easy insert replacement
• Ideal for high-precision boring and finishing

93° Cutting Edge Angle (U Type)

Allows improved surface finish, lower cutting resistance, and suitable clearance for boring.

Hand of Tool

• R = Right-hand cutting
• L = Left-hand cutting

Available Models & Specifications

Key Features

• Strong steel shank with excellent vibration resistance
• Screw-on clamping for stable insert positioning
• Compatible with TPGT triangular inserts
• 93° lead angle for smooth internal turning & finishing
• Available in right-hand and left-hand versions
• Precision-machined pocket for improved tool life

Applications

• Internal turning and boring
• Profiling and finishing operations
• Steel (ISO P), stainless steel (ISO M), cast iron (ISO K)
• Aluminum and non-ferrous materials