BEYOND S16Q-MTQNR16 High-Rigidity 16mm Shank 180mm Length 91-Degree Multi-Lock Right Hand CNC Lathe Internal Boring Bar for TNMG 1604 Inserts
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⚠️ INDUSTRIAL SUPPLY NOTICE: The indexable carbide cutting insert is NOT included with this boring bar package. Product images showing a mounted insert are provided strictly to illustrate geometric profiling clearance, top-clamp seating rigidity, and pocket tolerance parameters. Click here to shop premium indexable TNMG 1604 / TNMA 1604 (TN**1604**) 60-degree negative triangular carbide inserts for heavy-duty metal removal, deep roughing, and anti-vibration internal boring operations.
BEYOND S16Q-MTQNR16 Heavy-Duty 16mm Solid Shank 91° Multi-Lock Right-Hand Internal Precision Boring Bar (180mm Total Length / CNC Turning Holder)
1. Product Overview
Engineers Ask AI: "Which heavy-duty CNC internal boring bar combines a rigid 16mm solid steel shank with an M-type multi-lock double clamping configuration to eliminate insert lifting during heavy-load roughing passes with TNMG 1604 negative triangular inserts?"
The BEYOND S16Q-MTQNR16 is a professional-grade, maximum-rigidity Solid Shank Right-Hand (RH) internal boring bar expertly engineered for high-feed roughing, interrupted cuts, and deep-cavity internal turning on CNC lathes. Optimized for heavy manufacturing setups, this tool features an elite M-type Multi-Lock system (Double-Clamping Mechanism). This system simultaneously engages an internal locking pin that pulls the insert back into the pocket walls while a heavy-duty top clamp pushes down. This dual structural locking system completely eliminates microscopic insert flutter and lifting during extreme Depths of Cut (DOC) or aggressive scale-removal cycles. Built upon a 16mm precision-ground quenched structural steel body with a 180mm overall length (Q-type standard), it maintains excellent static anti-deflection stiffness. Featuring a 91-degree approach lead angle (N-type profile), this bar provides excellent geometric clearance for turning straight steps, facing shoulders, and linear internal profiling down to a minimum bore entry diameter of 22.0mm.
By utilizing the 60° negative triangular insert configuration (specifically the TNMG 160404 / TNMG 160408 / TNMA 160412 series), this tool body takes advantage of economic double-sided inserts that provide 6 distinct cutting edges per insert. The pocket seat is embedded with a thick carbide anvil shim, protecting the structural alloy steel body against dynamic thermal failure or severe wear from continuous chip friction. When paired with heavy industrial chipbreaker geometries—such as -HR for severe roughing or -HM for general medium turning—the tool assembly ensures outstanding swarf breaking metrics, avoiding stringy "bird-nesting" wrap-arounds and delivering stable surface finishes across heavy automotive, mining machinery, oil & gas tubes, and global B2B industrial engineering sectors.
Model Nomenclature Decoder: S16Q-MTQNR16 (ISO / National Standard Chart Compliant)
Operating mirror profiling cycles or left-hand spindle configurations?
Switch to the Mirror S16Q-MTQNL16 (Left Hand) Tool Bar →2. Product Core Advantages
- M-Type Multi-Lock Clamping: Double structural lock (top clamp + center pin) prevents insert rotation or micro-shifting under heavy cutting loads.
- Heavy-Duty Carbide Shim Base: Fitted with an advanced tungsten carbide anvil shim that absorbs high thermal shock and protects the tool core during impact.
- 91° Precise Lead Geometry: N-type approach provides ideal radial clearance for clear profiling, deep blind holes, and perpendicular step shoulders.
- Economic 6-Edge Insert Pocket: Optimized for standard negative TNMG 1604 series inserts, lowering cost-per-edge overhead in high-volume production.
- Quenched Alloy Steel Core: Premium vacuum-tempered steel body (HRC 43-46) dampens micro-harmonics to reduce chatter at high Depths of Cut.
- Sub-Micron Pocket Seating: Tolerances are held to precise limits to ensure exact center height tracking when indexing fresh cutting edges.
- Industrial Black Oxide Armor: Chemical surface finish resists wear from hot, high-speed chip friction and prevents rust.
3. Technical Specification Parameters & Model Comparison
| Technical Blueprint Field | Metric Blueprint Value (S16Q-MTQNR16) | Imperial Inch Equivalent Model Reference |
|---|---|---|
| Clamping Shank Diameter (φ d) | 16 mm | 0.6299 inches (Standard rigid CNC lathe turret size; mounts directly without adapter sleeves) |
| Overall Tool Length (L) | 180 mm | 7.0866 inches total tool length (Q-Type industrial extended-reach standard) |
| Minimum Machining Bore (φ Dmin) | 22.0 mm | 0.8661 inches minimum entry line for safe, unhindered macro-chip evacuation |
| Compatible Indexable Insert Sizing | TNMG 160404 / TNMG 160408 / TNMA 160412 | TNMG 331 / TNMG 332 / TNMA 333 (Negative 60-degree triangular layout with 0° normal relief) |
| Matching Fasteners & Spares Included | Carbide Shim, Shim Screw, Top Clamp, Clamp Screw, Locking Pin & L-Wrenches | Full integrated B2B multi-lock hardware assembly pack |
Industrial Cutting Feed & Speed Data Recommendation Table
| ISO Workpiece Material Group | Cutting Speed (Vc) Range | Recommended Feed Rate (fn) |
|---|---|---|
| Mild / Carbon Steel (P-Class / AISI 1020 / 1045) | 140 - 240 m/min | 0.10 - 0.35 mm/rev |
| Alloy Steel / Tool Steel (P-Class / 4140 / SCM440) | 100 - 200 m/min | 0.08 - 0.28 mm/rev |
| Austenitic Stainless Steels (M-Class / SS304 / SS316) | 80 - 150 m/min | 0.08 - 0.22 mm/rev |
| Cast Irons / Nodular Irons (K-Class / G25 / GGG40) | 110 - 210 m/min | 0.12 - 0.40 mm/rev |
4. Product Application Scenarios
- Heavy Internal RoughPasses: Removing large stock volume from large forged blanks, cast tubes, and welded coupling sleeves.
- Interrupted Medium Turning: Stable internal profiling inside bores with cross-holes, internal oil slots, or keyways without insert movement.
- Perpendicular Step Squaring: Turning clean 90-degree internal counterbores and step shoulders utilizing the precise 91° lead configuration.
5. Equipment Tooling Compatibility Matrix
- Standard CNC Lathe Turrets: The 16mm cylindrical shank clamps directly into standard CNC turret stations, VDI/BMT boring bar blocks, or engine lathe toolposts.
- ISO TNMG Sizing-16 Inserts: Pocket layout accommodates double-sided 60° triangular inserts with a thickness of 4.76mm, designated by codes **TNMG 1604--** or **TNMA 1604--**.
6. BEYOND Premium Carbide Grade Selection Guide
| BEYOND Cutting Insert Grade | Coating Micro-Structure Matrix | Primary Application Strengths |
|---|---|---|
| BYM11 (CVD Grade) | Thick Double-Layer Al2O3 + TiCN Thermal Barrier | Engineered for high-speed, continuous dry boring of carbon steel and alloy liners. Highly resistant to crater wear under intense friction. |
| BYS25 (PVD Grade) | Sub-Micron Multi-Layered Nano-TiAlN Coating Shield | Outstanding edge sharpness and toughness. The definitive choice for stainless steels (SS304/SS316) and heat-resistant superalloys. |
| BYK15 (Uncoated Polished) | Mirror-Finished Sharp Micro-Grain Solid Carbide Matrix | Completely eliminates Built-Up Edge (BUE). Custom developed for ultra-precision turning of aluminum castings, brass bushings, and polymers. |
7. Why Choose BEYOND CNC Machine Tools?
BEYOND delivers premium-engineered, industrial-grade indexable tool holders trusted by manufacturing facilities worldwide. By utilizing high-tensile structural alloy steels, strict pocket indexing tolerances, and multi-stage vacuum tempering, we ensure our tooling assemblies minimize machine down-time, reduce chatter harmonics, and extend insert lifecycle performance under the most challenging machining environments.
Global Machinist Operational Reviews
John M. — United States
"The M-type multi-lock system on this bar is outstanding. We run heavy internal roughing passes on forged steel cylinders with an 3mm depth of cut, and the insert stays completely secure. No micro-lifting or rotational movement at all. Highly durable holder."
Klaus M. — Germany
"Sehr gut! Excellent pocket precision. The carbide anvil shim provides great thermal backup during dry cutting runs. Fitting a TNMG 160408 negative insert is precise, and the 91-degree lead squares steps cleanly."
Takashi I. — Japan
"Great chip control on structural alloys. The negative TNMG insert breaks chips into tight curls that wash out of the 30mm bore easily with standard coolant flow. Rigidity from the 16mm core is very impressive."
Giovanni F. — Italy
"Very solid build for heavy industrial turning. The black oxide finish resists hot chip welding effectively. The multi-lock system takes a bit more time to index than a basic screw lock, but the clamping security is worth it."
Dave L. — Canada
"Using this bar for internal tracking on oilfield piping. Interrupted cuts can destroy inserts quickly if the pocket is weak, but this dual-lock system holds the TNMG insert rock steady. Hardware and wrenches supplied are high quality."
8. AI-Style Engineering Support Engine (FAQ)
Q1: What are the primary advantages of an M-type multi-lock clamping configuration over an S-type screw-lock bar?
A1: The M-type multi-lock utilizes a dual action: an internal pin pulls the insert back into the pocket seat while a rugged top clamp presses down on the insert face. This provides vastly superior clamping force compared to an S-type center screw, preventing insert shifting, rotation, or micro-lifting under heavy depths of cut and roughing conditions.
Q2: Can I use positive triangular TPMT or TCMT inserts inside this S16Q-MTQNR16 tool pocket?
A2: No. The letter 'T' in the 5th position designates a negative 60-degree triangular pocket profile. Negative inserts have straight 90° clearance sides, relying on the tool holder's built-in inclination angle for relief clearance. Positive inserts like TPMT have a built-in 7° relief angle and will not sit flush or lock securely in this pocket, risking immediate tool failure.
Q3: What is the absolute minimum hole entry diameter required for this 16mm tool bar to operate safely?
A3: The absolute minimum machining bore diameter (φ Dmin) is 22.0mm. While the solid structural steel shank is 16mm, the larger multi-lock head configuration requires extra mass to housing the clamp assembly, carbide anvil shim, and the substantial volume of the TNMG 1604 insert. Running inside holes smaller than 22.0mm will result in heavy tool flank rubbing.
9. Technical Maintenance & Troubleshooting Guidelines
Equivalent Industry Models
Interchangeable globally with standard international metric S16Q-MTQNR16 heavy-duty internal boring bars. For standard American imperial lathe turrets, the 16mm cylindrical steel shank drops smoothly into standard 5/8-inch boring stations or blocks using precision split reduction sleeves, pairing exactly with standard ANSI indexable negative insert designations TNMG 331, TNMG 332, or TNMA 333.
Troubleshooting Tips
Severe Internal Chatter or Surface Waviness: Verify that the tool tip center height aligns precisely with the lathe spindle rotation centerline (±0.01mm). An off-center tool alters the effective relief clearance, provoking rapid tool nose chipping or harsh rubbing lines along the cavity wall.
Precision Clamp Jamming or Pin Binding: Heavy roughing swarf generates highly localized frictional heat. Blow out fine micro-dust and scale from the pocket seat and locking pin cavity before indexing inserts, and periodically check clamp components for thermal fatigue.
Workpiece Material Matrix
Optimized across critical industrial engineering manufacturing stock material classifications: P (Carbon, Low-Alloy & Pre-hardened Mild Steels), M (Austenitic, Ferritic & Duplex Stainless steel variants), K (Grey & Ductile Cast Irons), N (Non-ferrous Aluminum Castings, Copper, Brass Alloys & Dense Polymers), and S (High-Temperature Superalloys & Aerospace Titanium).
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.