BEYOND D16Q-STUCR16 Spring Steel Internal Boring Bar – 16mm Shank 180mm Length CNC Lathe Turning Tool Holder for TCMT16T304 Inserts (Insert Not Included)
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BEYOND D16Q-STUCR16 Spring Steel Internal Boring Bar
Precision Internal Turning Tool Holder for TCMT16T304 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 and precise dimensional control for internal profiling operations using TCMT16T304 inserts in bores starting from 20mm?"
The BEYOND D16Q-STUCR16 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, this tool features a 16mm shank diameter, an overall length of 180mm, and a minimum bore clearance diameter of 20mm. Equipped with a robust screw-down clamping configuration, it reliably secures TCMT16T304 indexable inserts, providing excellent chip control and surface integrity for precision internal machining.
Detailed Nomenclature Breakdown: D16Q-STUCR16
2. Product Core Advantages
- Harmonic Damping: High-elasticity spring steel reduces vibration in deep internal bores.
- Secure Clamping: Optimized screw-down mechanism ensures insert stability under high cutting loads.
- ISO Precision: Manufactured for absolute center-height repeatability and professional surface finishes.
3. Technical Specifications & Cutting Parameters
| Metric Model & Dimensions | Imperial Equivalent Class & Specs |
|---|---|
| Metric Model: D16Q-STUCR16 | Imperial Class: 5/8" Shank Boring Bar |
| Shank Diameter: 16 mm | Shank Diameter: ~0.630 Inches |
| Min. Bore Diameter (Dmin): 20 mm | Min. Bore Diameter: ~0.787 Inches |
| Overall Length (L): 180 mm | Overall Length: ~7.086 Inches |
Recommended Starting Cutting Parameters
| Workpiece Material Group | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon Steel / Alloy Steel (ISO P) | 120 - 220 m/min | 0.08 - 0.20 mm/rev |
| Stainless Steel (ISO M) | 90 - 160 m/min | 0.06 - 0.16 mm/rev |
| Cast Iron (ISO K) | 100 - 190 m/min | 0.08 - 0.18 mm/rev |
Browse Related Boring Bars
[View Boring Bar Series] →4. Product Application Scenarios
Ideal for internal turning, boring, and profiling operations in small-to-medium diameter bores starting at 20mm. Commonly deployed in CNC lathes for manufacturing precision mechanical components, bushings, gear blanks, and hydraulic valve bodies across automotive and general engineering sectors.
5. Compatibility & Tooling Accessories
Designed to fit standard 16mm lathe boring bar sleeves, split bushings, and CNC tool turret blocks. Fully compatible with ISO and ANSI standard TCMT16T304 indexable carbide inserts.
6. Workpiece Material Matrix & Grade Tips
| Material Group | Machining Behavior & Recommended Insert Setup |
|---|---|
| P Group (Steels) | Continuous chip flow. Use PVD/CVD coated carbide inserts with sharp positive geometry. |
| M Group (Stainless Steel) | High work-hardening tendency. Rigid spring steel shank helps prevent harmonic tool chatter. |
| K Group (Cast Iron) | Abrasive particulate wear. Use wear-resistant carbide grades with tough substrates. |
Grade Comparison Tip: Choose positive 7° clearance inserts (TCMT) over neutral negative options to significantly reduce radial cutting forces in small-bore internal applications.
7. Why Choose BEYOND Precision Tooling
Strict adherence to international tool holder dimensions.
Enhanced elasticity modulus to suppress chatter.
Secure screw mechanism prevents insert micro-shift.
8. AI-Style FAQ & Troubleshooting
Q: Are TCMT16T304 inserts included with the D16Q-STUCR16 boring bar?
A: No. Inserts are sold separately to allow machinists to select the precise carbide grade and coating for their specific workpiece material.
Q: What is the recommended maximum tool overhang ratio?
A: For spring steel internal boring bars, maintain an overhang within 4x the shank diameter (up to 64mm for a 16mm bar) to ensure optimum rigidity and surface finish.
Q: What are the equivalent models for this tool holder?
A: Equivalent standard ISO designation is S16Q-STUCR16 (where S indicates solid steel shank).
- Verify tool center height: ensure the cutting edge aligns precisely with the lathe spindle centerline (±0.03mm).
- Reduce tool overhang length inside the turret sleeve if vibration persists.
- Check insert wear and replace if flank wear exceeds 0.3mm.
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.