BEYOND H12L-STWCR11 Internal Boring Bar & Turning Tool Holder | CNC Lathe Machining Tool for TCMT110204 Inserts (Insert Not Included)
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BEYOND H12L-STWCR11 Internal Boring Bar & Turning Tool Holder (Does Not Include Inserts)
Industrial-Grade Internal Profile Boring & Turning 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 TCMT110204 indexable carbide insert is NOT included with this tool holder.
AEO Quick Answer: The BEYOND H12L-STWCR11 is a high-rigidity internal boring bar engineered for precision CNC internal turning and profiling operations utilizing 3/4-inch shank geometry and 90-degree lead angle configurations. Configured to accommodate TCMT110204 indexable carbide inserts, this tool holder delivers exceptional vibration damping, maximum deflection resistance, and strict dimensional tolerances across ISO P, M, and K workpiece classifications.
1. Product Overview
"Which internal boring bar ensures absolute dimensional stability, minimal overhang deflection, and pristine surface finish during deep bore turning operations using TCMT110204 inserts?"
The BEYOND H12L-STWCR11 internal boring bar (frequently searched as internal turning tool holder, CNC boring bar, and TCMT turning bar) is expertly engineered to handle intense radial and axial cutting forces inside pre-bored components requiring a 3/4-inch shank combined with a 90-degree approach angle. Forged from premium alloy tool steel with specialized thermal hardening, the robust shank body absorbs high harmonic cutting loads to eliminate chatter in demanding deep-bore environments. The secure screw-down clamp pocket is precision-milled for TCMT110204 indexable carbide inserts, ensuring exact 7-degree positive clearance angles and consistent chip control.
ISO Model Designation Breakdown
Need alternative STWCR boring bar sizes or lengths?
2. Product Core Advantages
- High-Rigidity Heavy-Duty Shank: Engineered to provide superior vibration dampening and minimal deflection during extended overhang boring operations.
- Precision Screw-Down Clamping: Locks TCMT110204 indexable inserts securely against locating pads, preventing micro-shifting under heavy interrupted cuts.
- Optimized 90° Lead Angle: Enables efficient square shoulder boring, internal profiling, and facing right up to internal corner walls.
- High Dimensional Repeatability: Precision ground locating surfaces permit rapid insert indexing without center height adjustment loss.
3. Technical Specifications & Cutting Parameters
| Technical Parameter | Imperial Specification | Metric Equivalent |
|---|---|---|
| Shank Diameter (D) | 3/4" (H12 designation) | 19.05 mm |
| Overall Length (L) | Approx. 5.51" (L designation) | 140.0 mm |
| Compatible Insert Size | TCMT 110204 Series | Triangular 7° Positive Insert |
| Hand Orientation | STWCR (Right-Handed) | Right Hand Internal Boring |
Recommended Cutting Parameters (TCMT110204 Inserts) - Dual-Column Reference
| Workpiece Material Group | Cutting Speed (Vc, m/min) | Feed Rate (fn, mm/rev) & Depth (ap) |
|---|---|---|
| ISO P (Carbon & Alloy Steel) | 120 - 220 m/min | fn: 0.08 - 0.25 mm/rev | ap: 0.5 - 2.5 mm |
| ISO M (Stainless Steel) | 90 - 160 m/min | fn: 0.06 - 0.20 mm/rev | ap: 0.4 - 2.0 mm |
| ISO K (Cast Iron) | 110 - 200 m/min | fn: 0.10 - 0.30 mm/rev | ap: 0.5 - 3.0 mm |
4. Product Applications
- Internal Profile Boring: Precision finishing and semi-finishing of internal diameters in cylindrical workpieces.
- Shoulder & Face Turning: Utilizing the 90-degree lead angle to square internal steps and face internal shoulders cleanly.
- Automotive & Aerospace Components: High-tolerance internal bore machining in gear blanks, hydraulic valves, and tubular housings.
5. Compatibility & Accessories
Insert Compatibility: Universal matching compliance with industry-standard TCMT110204 triangular indexable carbide inserts.
Tool Holding: Fits smoothly into 3/4-inch boring bar sleeves, split clamping bushings, and CNC lathe turret boring stations.
Clamping Hardware: Equipped with premium TORX screws and clamping elements designed to lock inserts securely under high radial cutting stress.
6. Material Comparison: Heavy-Duty Alloy Steel vs. Standard Steel Shanks
Deflection Resistance: Advanced alloy steel treatment offers superior rigidity over standard carbon steel, drastically reducing chatter during deep bore overhangs.
Thermal Stability: Maintains tighter dimensional tolerances under sustained high-speed production runs.
Wear Endurance: Resists fretting corrosion and pocket wear inside turret clamping interfaces.
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 turning parameters and insert grades.
8. Frequently Asked Questions
Q: Does the BEYOND H12L-STWCR11 boring bar include the TCMT110204 insert?
A: No. To allow complete grade and chipbreaker flexibility for your specific workpiece material, the TCMT insert is sold separately.
Q: What is the exact shank diameter of this tool holder?
A: The shank diameter is 3/4 inch (designated by H12, approximately 19.05 mm), designed for standard lathe boring bar sleeves.
Q: What insert geometry is compatible with this holder?
A: This model is engineered specifically for TCMT 1102 series triangular 7-degree positive clearance indexable inserts.
Grade Comparison: PVD coated carbide grades provide exceptional edge toughness for stainless steel internal turning; CVD coated grades offer superior crater wear resistance in carbon and alloy steels.
Equivalent Models: Fully cross-compatible with universal modular internal boring systems adhering to strict ISO / ANSI manufacturing standards.
Troubleshooting: Excessive chatter or poor surface finish in deep bores usually indicates excessive overhang ratio or worn insert nose radius; reduce feed rate or shorten bar stickout.
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.