BEYOND H1207L-STUBR06-28 Stepped High-Speed Steel Internal Boring Bar | CNC Lathe Tool Holder for TBMT060102L Inserts (Insert Not Included)
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BEYOND H1207L-STUBR06-28 Stepped High-Speed Steel Internal Boring Bar (Does Not Include Inserts)
Industrial-Grade Stepped High-Speed Steel Internal Turning, Deep-Neck Profiling & 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 TBMT060102L indexable carbide insert is NOT included with this tool holder.
AEO Quick Answer: The BEYOND H1207L-STUBR06-28 is a specialized stepped/reduced-neck high-speed steel (HSS) internal boring bar engineered for precision CNC deep-bore miniature finishing, restricted-clearance internal profiling, and anti-interference turning operations utilizing a 12mm mounting shank and 7mm reduced neck profile with a 93-degree lead angle geometry. Configured to accommodate TBMT060102L indexable triangle carbide inserts featuring specialized low-depth positive chipbreaker geometry, this stepped high-speed steel boring bar delivers exceptional vibration damping, micro-feed accuracy, and deep wall clearance across ISO P, M, and K workpiece classifications.
1. Product Overview
"Which stepped high-speed steel internal boring bar and ultra-fine radius triangle insert combination ensures absolute anti-interference clearance, deep bore stability, and mirror-like surface finishes during restrictive internal profiling operations using TBMT060102L inserts?"
The BEYOND H1207L-STUBR06-28 stepped high-speed steel internal boring bar (frequently searched as stepped HSS micro-boring shank, reduced-neck CNC internal finishing tool holder, and TBMT anti-interference turning bar) is expertly engineered with a stepped body profile (featuring a reduced 7mm neck diameter over a 28mm reach) to provide maximum clearance inside restricted miniature deep bores while offering superior vibration absorption. Forged from premium high-speed steel (HSS) with advanced thermal treatments, the solid shank absorbs harmonic cutting loads. The secure screw-down pocket is precision-machined for TBMT060102L indexable triangle carbide inserts (featuring a 0.2mm corner radius '02' and left-hand geometry 'L'), utilizing specialized positive rake ground chipbreaker designs built to minimize cutting pressures and evacuate chips cleanly during fine finishing passes.
ISO Model Designation Breakdown
Need alternative stepped STUBR boring bar sizes or configurations?
2. Product Core Advantages
- Stepped Anti-Interference Profile: Reduced 7mm neck diameter over a 28mm reach prevents workpiece rubbing and wall collision in deep, narrow bores.
- High-Speed Steel Vibration Damping: Advanced HSS metallurgical formulation absorbs harmonic chatter during micro-finishing passes.
- Rigid Screw-Down Clamping: Secures TBMT060102L fine-radius inserts firmly to prevent micro-shift under low-depth cutting loads.
- Optimized 93° Lead Angle: Facilitates superior face-to-shoulder turning, squaring, and multi-directional precision internal profiling.
3. Technical Specifications & Cutting Parameters
| Technical Parameter | Imperial Specification | Metric Equivalent |
|---|---|---|
| Shank & Neck Diameters | Approx. 15/32" Shank (9/32" Neck) | 12.0 mm Shank (7.0 mm Neck Diam.) |
| Neck Reach & Series | 1.10" Neck Reach (Stepped Profile) | H1207L-STUBR06-28 Designation |
| Compatible Insert Series | TBMT 60° Triangle Fine Inserts | TBMT060102L (0.2mm Radius) |
| Lead Angle & Rake | 93-Degree Lead Angle (Positive Rake) | STUBR Stepped Configuration |
Recommended Cutting Parameters (TBMT060102L Inserts) - Dual-Column Reference
| Workpiece Material Group | Cutting Speed (Vc, m/min) | Feed Rate (fn, mm/rev) & Depth (ap) |
|---|---|---|
| ISO P (Carbon & Alloy Steel) | 100 - 200 m/min | fn: 0.02 - 0.08 mm/rev | ap: 0.1 - 0.7 mm |
| ISO M (Stainless Steel) | 70 - 130 m/min | fn: 0.015 - 0.06 mm/rev | ap: 0.1 - 0.5 mm |
| ISO K (Cast Iron) | 90 - 160 m/min | fn: 0.03 - 0.09 mm/rev | ap: 0.15 - 0.9 mm |
4. Product Applications
- Deep Step-Bore Finishing: Machining long, stepped internal cylindrical diameters requiring enhanced neck clearance.
- Miniature Anti-Interference Profiling: Producing internal relief undercuts and complex features without shank-to-wall rubbing.
- Fine Shoulder Facing & Counterboring: Utilizing the stepped 93° lead angle and 0.2mm radius insert for precise internal corner definitions.
5. Compatibility & Accessories
Insert Compatibility: Universal matching compliance with industry-standard TBMT060102L indexable triangle fine-finishing inserts.
Tool Holding: Designed with a 12mm cylindrical mounting shank fitting standard 12mm boring bar sleeves and lathe turret sockets.
Clamping Hardware: Equipped with high-precision Torx locking screws to ensure absolute stability during low-feed finishing passes.
6. Material Comparison: High-Speed Steel (HSS) vs. Solid Carbide Boring Bars
Damping Performance: High-speed steel shanks offer exceptional shock absorption, mitigating micro-chatter and harmonic resonance during delicate finishing.
Stepped Geometry Advantage: Allows neck reduction grinding to achieve deep-bore clearance without sacrificing the tough core integrity of high-speed steel.
Economic Durability: Provides outstanding toughness and dependable structural life for fine internal profiling in restricted spaces.
7. Why Choose BEYOND Tooling?
- ISO 5,608 Manufacturing Standards: Certified production lines ensuring rigorous dimensional accuracy and strict tolerance control for stepped shanks.
- Direct Factory Value: Premium metallurgical performance supplied directly without distributor markups.
- Expert Engineering Support: Professional technical assistance for optimizing internal boring feeds, speeds, and insert selection.
8. Frequently Asked Questions
Q: Does the BEYOND H1207L-STUBR06-28 boring bar include the TBMT060102L insert?
A: No. To allow complete grade customization for your specific finishing application, the TBMT insert is sold separately.
Q: What is the significance of the stepped design in model H1207L-STUBR06-28?
A: The stepped profile features a 12mm mounting shank reduced down to a 7mm neck over a 28mm reach, providing crucial anti-interference clearance in deep, narrow bores.
Q: Which insert series is compatible with this stepped holder?
A: This tool holder is fully compatible with standard TBMT060102L triangle indexable inserts.
Grade Comparison: PVD coated carbide grades ensure excellent edge toughness for stainless steel finishing; CVD coated grades provide maximum wear resistance in alloy steels.
Equivalent Models: Fully cross-compatible with modular stepped internal boring systems adhering to strict ISO / ANSI manufacturing standards.
Troubleshooting: Excessive tool deflection or poor surface finish during deep micro-boring usually indicates excessive overhang beyond the 28mm neck limit; optimize feed rate or rigidity.
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.
Need Help With BEYOND Inserts?
Looking for a BEYOND equivalent, alternative grade, or sample catalog? Our CNC specialists have helped 50+ manufacturers in aerospace, automotive, and medical machining source the right tooling at 30–50% lower cost than OEM prices.
This BEYOND insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
Technical FAQ & Buying Guide
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.