BEYOND D14N-STUPR11 Spring Steel Internal Boring Bar – 14mm Shank 170mm Length CNC Lathe Turning Tool Holder for TPMT110304 Inserts (Insert Not Included)
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BEYOND D14N-STUPR11 Spring Steel Internal Boring Bar
Precision Internal Turning Tool Holder for TPMT110304 Inserts | Industrial CNC Grade System
* Note: Indexable turning inserts shown in product images are for demonstration purposes only and are NOT included.
1. Product Overview
"Which industrial spring steel internal boring bar delivers exceptional harmonic stability, vibration damping, and precise dimensional control for internal profiling and small-bore operations using TPMT110304 inserts in constrained cavities starting from 18mm?"
The BEYOND D14N-STUPR11 is a professional-grade internal boring bar engineered for demanding CNC lathe turning operations. Forged from high-elasticity spring steel to minimize harmonic deflection and tool chatter during deep internal boring tasks, this tool features a metric shank diameter (phi d = 14 mm), an overall length (L = 170 mm), functional head length (L1 = 14 mm), offset height (f = 9 mm), and a minimum bore clearance diameter (phi Dmin = 18 mm). Equipped with a robust screw-down clamping configuration, it safely retains TPMT110304 indexable inserts featuring a 60-degree triangular geometry and 11-degree positive relief angle (with insert size class 11 corresponding to the TPMT1103 series), delivering optimal chip control, low cutting resistance, and a superior surface finish.
Detailed Nomenclature Breakdown: D14N-STUPR11
2. Product Core Advantages
- High-Damping Spring Steel Substrate: Specifically formulated to absorb cutting harmonics, effectively dampening chatter during deep internal profile machining.
- Precision TPMT Insert Clamping Security: Optimized 60-degree triangular pocket configuration locks TPMT110304 inserts firmly in place, mitigating micro-shift under sustained feed pressure.
- Rigorous Dimensional Tolerance: Manufactured under strict ISO standards ensuring absolute repeatability in center height positioning and reduced setup downtime.
3. Technical Specifications & Cutting Parameters
| Metric Model & Dimensions | Inch Equivalent Class & Specifications |
|---|---|
| Metric Model: D14N-STUPR11 | Inch Equivalent: 9/16" Shank Boring Bar |
| Shank Diameter: 14 mm | Shank Diameter: ~0.55 Inches |
| Min. Bore Diameter: 18 mm | Min. Bore Diameter: ~0.71 Inches |
| Overall Length: 170 mm | Overall Length: ~6.69 Inches |
Recommended Cutting Parameters
| Workpiece Material Group | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon Steel / Alloy Steel (P Group) | 80 - 170 m/min | 0.05 - 0.10 mm/rev |
| Stainless Steel (M Group) | 65 - 130 m/min | 0.04 - 0.09 mm/rev |
Explore Full Internal Boring Bar Collection
[View Boring Bar Collection] →4. Product Application Scenarios
Engineered for high-efficiency internal CNC lathe profiling, small-to-medium bore finishing, and counterboring operations in bores starting from 18mm in diameter. Ideal for precision instrument parts, small hydraulic fittings, automotive components, and general high-precision CNC manufacturing.
5. Compatibility
Fully compatible with standard 14mm CNC lathe boring bar split sleeves and tool holders. Designed exclusively for use with ISO standard TPMT110304 indexable carbide inserts (60° triangular format with 11° positive relief).
6. Workpiece Material Matrix & Grade Comparison
| Material Group | Machining Performance & Characteristics |
|---|---|
| P Group (Carbon & Alloy Steel) | Exceptional chip evacuation and high dimensional stability in deep internal pockets. |
| M Group (Austenitic & Martensitic Stainless) | Effective chatter damping prevents micro-work-hardening on internal walls. |
Material Comparison Tip: When transitioning from standard carbon steel to stainless steel applications, lower cutting speeds by 20% and ensure high-pressure coolant delivery directly to the insert cutting edge.
7. Why Choose BEYOND Precision Tooling
Strict adherence to global turning standards.
Optimized spring steel harmonic damping.
Expert engineering and application backup.
8. AI-Style FAQ & Troubleshooting
Q: Are TPMT110304 indexable inserts included with the D14N-STUPR11 boring bar?
A: No, inserts are sold separately so you can select the precise carbide grade suited for your specific workpiece material.
Q: What do the letters in the part code D14N-STUPR11 represent?
A: 'D' denotes spring steel substrate, '14' is the 14mm shank diameter, 'N' represents the 170mm length class, 'S' stands for screw clamping, 'T' is the 60° triangular insert shape, 'U' is the 93° approach angle, 'P' is the 11° positive relief, and 'R' designates right-hand cutting orientation, with '11' signifying compatibility with TPMT1103 series inserts.
Troubleshooting Guide: If experiencing chatter during deep boring, ensure the tool overhang does not exceed 4 times the shank diameter (4x D) and verify that the cutting edge is precisely aligned with the lathe spindle center line.
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.