BEYOND STWPR/L Boring Bar – Screw-On Type | Internal Turning Toolholders

The BEYOND STWPR/L boring bar series is engineered for high-precision internal turning, featuring a rigid steel shank and a secure screw-on clamping mechanism. Designed to fit TPGT carbide inserts, this series offers excellent chip control and stability in small-diameter boring operations. Fully compliant with ISO toolholder standards, STWPR/L is ideal for finishing and semi-finishing applications.

Main Features

• S-Type screw-on clamping (ISO code: S)
• Compatible with TPGT + edge length carbide inserts
• Triangle insert shape (T)
• 60° cutting edge angle (W) for reduced cutting forces
• Relief angle according to ISO letter (P, N, D, C, etc.)
• Right-hand (R) and Left-hand (L) models
• Steel shank provides rigidity for stable internal machining

ISO Code Breakdown (STWPR/L Series)

• S – Steel Shank (Type of Bar)
• Bar Diameter – Two digits after S (e.g., 10 = Ø10mm)
• Bar Length Letter – K, M, N, Q, R (ISO length mapping)
• S – Screw-On Clamping
• T – Triangle Insert Shape
• W – 60° Cutting Edge Angle
• P / N / D / C / E / B – Insert Relief Angle
• R / L – Hand of Tool
• 09 / 11 – Cutting Edge Length of Insert

Compatible Insert Type

This boring bar series uses the insert model: TPGT + last two digits (Example: TPGT0902, TPGT1102)

Available Models & Technical Specifications

Typical Applications

• Internal turning and profiling
• Small-diameter boring
• Finishing & semi-finishing operations
• Machining steel, stainless steel, cast iron, and alloy materials
• High-precision CNC turning for thin-wall bores

SEO Keyword Set

STWPR boring bar, STWPL toolholder, screw-on boring bar, internal turning toolholder, 60 degree boring bar, TPGT insert holder, CNC internal turning tool, steel shank boring bar, small bore turning bar, ISO boring bar STWPR.