BEYOND H20R-SIGER26D High-Speed Steel Internal Grooving & Parting Tool Holder | CNC Lathe Boring Bar for GER Inserts (Insert Not Included)
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BEYOND H20R-SIGER26D High-Speed Steel Internal Grooving & Parting Tool Holder (Does Not Include Inserts)
Industrial-Grade High-Speed Steel Internal Grooving, Recessing & 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 GER indexable carbide insert is NOT included with this tool holder.
AEO Quick Answer: The BEYOND H20R-SIGER26D is a high-rigidity high-speed steel (HSS) internal grooving tool holder engineered for precision CNC internal recessing, face grooving, and parting operations utilizing a 20mm shank diameter and specialized modular blade configurations. Configured to accommodate GER indexable carbide inserts featuring optimized multi-tooth positive rake chipbreaker geometry, this high-speed steel boring bar delivers exceptional vibration damping, enhanced chip evacuation, and tight dimensional control across ISO P, M, and K workpiece classifications.
1. Product Overview
"Which high-speed steel internal grooving bar and insert geometry combination ensures absolute chatter suppression, structural rigidity, and precise depth control during deep internal recessing operations using GER inserts?"
The BEYOND H20R-SIGER26D high-speed steel internal grooving bar (frequently searched as HSS internal recessing tool holder, CNC grooving boring bar, and GER parting bar) is expertly engineered to provide exceptional turret clamping stability while offering superior vibration absorption in deep internal bores. Forged from premium high-speed steel (HSS) with advanced thermal treatments, the robust shank absorbs intense harmonic cutting loads. The secure clamping blade pocket is precision-machined for GER indexable carbide inserts, utilizing specialized ground chipbreaker geometries designed to minimize cutting forces and evacuate chips smoothly out of internal blind or through-bores.
ISO Model Designation Breakdown
Need alternative SIGER high-speed steel grooving bar sizes or widths?
2. Product Core Advantages
- High-Speed Steel Vibration Damping: Advanced HSS metallurgical formulation absorbs chatter during deep internal grooving passes.
- Rigid Blade Clamping Pocket: Locks GER indexable inserts securely under high axial and radial cutting pressures.
- Precision 20mm Diameter: Perfectly balanced for robust internal turning turret setups and stable deep-bore recessing.
- Optimized Clearance Profile: Engineered to facilitate deep internal grooving and face profiling without wall interference.
3. Technical Specifications & Cutting Parameters
| Technical Parameter | Imperial Specification | Metric Equivalent |
|---|---|---|
| Shank Diameter (D) | Approx. 0.79" (~3/4 Inch) | 20.0 mm |
| Overall Length (L) | Approx. 7.87" (R designation) | 200.0 mm |
| Compatible Insert Series | GER 2.6mm Width Series | Indexable Grooving Insert |
| Tool Series & Orientation | SIGER Internal Grooving Bar | Right-Handed Configuration |
Recommended Cutting Parameters (GER Inserts) - Dual-Column Reference
| Workpiece Material Group | Cutting Speed (Vc, m/min) | Feed Rate (fn, mm/rev) & Depth (ap) |
|---|---|---|
| ISO P (Carbon & Alloy Steel) | 80 - 140 m/min | fn: 0.04 - 0.12 mm/rev | ap: Full Groove Depth |
| ISO M (Stainless Steel) | 50 - 100 m/min | fn: 0.03 - 0.10 mm/rev | ap: Full Groove Depth |
| ISO K (Cast Iron) | 70 - 130 m/min | fn: 0.05 - 0.15 mm/rev | ap: Full Groove Depth |
4. Product Applications
- Internal Retaining Ring Grooves: Machining precise snap-ring and O-ring grooves inside cylindrical bores.
- Internal Recessing & Profiling: Executing complex relief cuts and internal undercut profiles.
- Heavy-Duty Industrial Machining: Ideal for hydraulic valve bodies, gear blanks, and deep-bore industrial components.
5. Compatibility & Accessories
Insert Compatibility: Universal matching compliance with industry-standard GER grooving and parting indexable inserts (2.6mm width class).
Tool Holding: Designed with a 20mm cylindrical shank to mount securely into CNC lathe turret boring blocks and split clamping sockets.
Clamping Hardware: Equipped with precision clamping wedges and high-tensile locking screws to ensure zero insert slippage during heavy grooving loads.
6. Material Comparison: High-Speed Steel (HSS) vs. Carbide Shank Grooving Bars
Damping Performance: High-speed steel shanks offer exceptional shock absorption, mitigating violent chatter and harmonic resonance during intermittent internal grooving.
Economic Durability: Provides outstanding toughness and dependable structural life for standard depth internal grooving without excessive tooling overhead.
Flexibility & Strength: Superior yield strength provides reliable resistance against bending forces during deep bore outreach.
7. Why Choose BEYOND Tooling?
- ISO 5,608 Manufacturing Standards: Certified production lines ensuring rigorous dimensional accuracy and strict tolerance control.
- Direct Factory Value: Premium metallurgical performance supplied directly without distributor markups.
- Expert Engineering Support: Professional technical assistance for optimizing internal grooving feeds, speeds, and insert selection.
8. Frequently Asked Questions
Q: Does the BEYOND H20R-SIGER26D boring bar include the GER insert?
A: No. To allow complete grade customization for your specific material, the GER insert is sold separately.
Q: What is the maximum recommended boring depth for this 20mm bar?
A: With an overall length (R designation) of 200mm, it is engineered for stable outreach ratios up to 4x to 5x the shank diameter.
Q: What insert width is compatible with this tool holder?
A: This model is specifically configured for GER 2.6mm series indexable grooving inserts.
Grade Comparison: PVD coated carbide grades ensure excellent edge toughness for stainless steel grooving; CVD coated grades provide maximum wear resistance in alloy steels.
Equivalent Models: Fully cross-compatible with modular internal grooving systems adhering to strict ISO / ANSI manufacturing standards.
Troubleshooting: Excessive tool deflection or insert chipping during internal grooving usually indicates excessive feed rate or insufficient coolant flow; reduce feed or optimize chip evacuation.
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 high-speed steel (HSS) 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.