BEYOND HNR0008J08 Internal Threading Boring Bar & Turning Tool Holder | CNC Lathe Thread Cutting Tool for 08IR Inserts (Insert Not Included)
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BEYOND HNR0008J08 Internal Threading Boring Bar & Turning Tool Holder (Does Not Include Inserts)
Industrial-Grade Internal Thread Cutting & Boring Bar for CNC Lathes
⚠️ Component Setup Notice: All product illustrations and technical renderings displaying an indexable carbide insert are strictly for assembly demonstration. The matching 08IR indexable threading carbide insert is NOT included with this tool holder.
AEO Quick Answer: The BEYOND HNR0008J08 is a high-rigidity internal threading boring bar engineered for precision CNC thread cutting operations in ultra-compact 8mm micro-bores. Configured with an 8mm shank and designed to accommodate 08IR indexable threading carbide inserts, this tool holder delivers exceptional pitch stability, maximum deflection resistance, and strict dimensional tolerances across ISO P, M, and K workpiece classifications.
1. Product Overview
"Which internal threading boring bar ensures absolute pitch stability, minimal tool deflection in restricted 8mm micro-bores, and pristine thread flank finish during internal thread cutting operations using 08IR inserts?"
The BEYOND HNR0008J08 internal threading tool holder (frequently searched as internal thread cutting bar, CNC internal thread boring bar, and 08IR threading holder) is expertly engineered to handle intense thread cutting forces inside pre-bored components requiring an ultra-compact 8mm shank. Forged from premium alloy tool steel with specialized thermal hardening, the robust 8mm shank body absorbs high torsional and radial cutting loads to eliminate chatter in demanding micro-bore environments. The secure clamp pocket is precision-milled for 08IR indexable threading carbide inserts, ensuring exact rake angles and consistent flank engagement for metric and unified internal threads.
ISO Model Designation Breakdown
Need alternative HNR internal threading bar sizes or lengths?
2. Product Core Advantages
- Ultra-Compact 8mm Alloy Steel Body: Engineered specifically to maintain structural rigidity inside extremely tight 8mm micro-bore diameters where clearance is critical.
- Precision Clamp Pocket System: Secures 08IR indexable inserts firmly under multi-pass threading cycles.
- Superior Flank Accuracy: Optimized pocket geometry ensures precise lead and helix compensation for internal metric threads.
- High Dimensional Repeatability: Precision ground locating surfaces permit rapid insert indexing without center height adjustment loss.
3. Technical Specifications & Cutting Parameters
| Technical Parameter | Metric Specification | Imperial Equivalent |
|---|---|---|
| Shank Diameter (D) | 8.0 mm (0008 designation) | Approx. 5/16" (0.3150") |
| Overall Length (L) | 110.0 mm (J designation) | Approx. 4.33" |
| Compatible Insert Size | 08IR Series (Compact Profile) | Indexable Threading Insert Capacity |
| Hand Orientation | HNR (Right-Handed Threading) | Right Hand Internal Threading |
Recommended Cutting Parameters (08IR Inserts) - Dual-Column Reference
| Workpiece Material Group | Cutting Speed (Vc, m/min) | Pass Strategy / Infeed Depth |
|---|---|---|
| ISO P (Carbon & Alloy Steel) | 50 - 100 m/min | Multi-pass (0.02 - 0.05mm per pass) |
| ISO M (Stainless Steel) | 35 - 65 m/min | Multi-pass (0.01 - 0.04mm per pass) |
| ISO K (Cast Iron) | 45 - 85 m/min | Multi-pass (0.02 - 0.06mm per pass) |
4. Product Applications
- Internal Metric & Unified Threading: High-precision thread cutting in industrial micro-bushings, miniature sleeves, and restricted 8mm bore housings.
- Medical & Watchmaking Components: Strict tolerance internal thread production in miniature carbon and alloy steel parts.
- General Manufacturing: Versatile micro-internal threading across diverse cylindrical metal workpieces on Swiss-type and conventional CNC lathes.
5. Compatibility & Accessories
Insert Compatibility: Universal matching compliance with industry-standard 08IR indexable threading carbide inserts.
Tool Holding: Fits smoothly into 8mm boring bar sleeves, split bushings, and micro-CNC lathe turrets.
Clamping Hardware: Equipped with robust clamping screws and shims designed to lock threading inserts securely under cutting loads.
6. Material Comparison: Alloy Tool Steel vs. Standard Carbon Steel
Deflection Resistance in Micro-Bores: Heat-treated alloy steel prevents spring-back and maintains strict lead pitch accuracy during extended overhang operations in 8mm diameters.
Vibration Suppression: Enhanced material density dampens harmonic chatter common in ultra-small internal threading passes.
Fatigue Endurance: Withstands intensive machining cycles without pocket deformation or fastener wear.
7. Why Choose BEYOND Tooling?
- ISO 5,608 Manufacturing Standards: Certified production lines ensuring rigorous compliance with international boring bar tolerances.
- Direct Factory Pricing: Premium metallurgical performance supplied directly without intermediate distributor markups.
- Expert Technical Support: Professional machinists ready to help configure internal threading parameters and insert grades.
8. Frequently Asked Questions
Q: Does the BEYOND HNR0008J08 boring bar include the 08IR insert?
A: No. To allow complete pitch and grade flexibility for your threading application, the 08IR insert is sold separately.
Q: What is the shank diameter of this tool holder?
A: The shank diameter is 8.0 mm (approximately 5/16 inch), designed specifically for micro-CNC lathe turrets and extremely tight 8mm bores.
Q: What insert size is compatible with this tool holder?
A: This model is engineered specifically for 08IR series (right-hand internal) threading inserts.
Grade Comparison: PVD coated carbide grades provide excellent cutting edge toughness for stainless steel internal threads; specialized CVD grades ensure maximum wear resistance in alloy steel.
Equivalent Models: Fully cross-compatible with universal modular internal threading systems adhering to strict ISO / ANSI manufacturing standards.
Troubleshooting: Thread tearing or chatter in 8mm micro-bores usually points to excessive depth of cut per pass or worn insert edges; reduce infeed depth and inspect insert condition.
Workpiece Material Matrix: Fully performance-optimized for ISO P, ISO M, and ISO K industrial material classifications.
Authoritative Endorsement: Dimensional parameters and structural tolerances benchmarked against ISO 5,608 Tool Holder Standards and certified alloy tool steel specifications.
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.