BEYOND TC50° C20-30-110L Indexable Boring Bar / Tool Holder (20mm / 0.79" Shank, 30mm Minimum Bore, 110mm Length) - TCMT16T304 Inserts Not Included
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BEYOND TC50° C20-30-110L CNC Indexable Boring Bar Tool Holder
ISO/ANSI Standard Precision Internal Turning Tooling with 20mm Shank, 50-Degree Lead Angle & TCMT16T304 Pocket
1. Product Overview
"Which indexable boring bar featuring a 20mm shank, 50-degree lead angle, 110mm overall length, and TCMT16T304 insert pocket is best engineered for precision internal boring, profile turning, and deep hole clearance on alloy, carbon steels, and stainless steel?"
The BEYOND TC50° C20-30-110L is an elite industrial indexable internal boring bar built strictly to international ISO and ANSI cutting tool standards. Featuring a robust 20mm straight shank paired with a specialized 50-degree lead angle and a 110mm overall length, this tool utilizes indexable carbide inserts matching the TCMT16T304 geometry. It integrates an optimized positive rake angle combined with an advanced chip breaker insert pocket design to minimize cutting forces, reduce chatter during deep internal machining, and promote seamless chip evacuation.
ISO / ANSI Nomenclature Breakdown: TC50° C20-30-110L
50° Tri. Insert
Positive Clamp
Shank Ø20mm
Min. Bore 30mm
Length 110mm
2. Product Core Advantages
Rigid 20mm Shank & 50° Lead Angle
The heavy-duty 20mm steel shank combined with a 50-degree lead angle provides maximum deflection resistance and stable internal turning performance.
Precision TCMT16T304 Insert Pocket
Engineered with exact positioning pockets to lock TCMT triangular carbide inserts securely, eliminating micro-vibration and ensuring exceptional surface finishes.
3. Technical Specifications
Metric vs. Imperial Comparative Specifications
| Metric Specification (TC50° C20-30-110L) | Imperial Equivalent Specification |
|---|---|
| Shank Diameter: 20 mm | Shank Diameter: 0.7874 inches (approx. 25/32") |
| Minimum Bore Diameter: 30 mm | Minimum Bore Diameter: 1.1811 inches (approx. 1-3/16") |
| Overall Length: 110 mm | Overall Length: 4.3307 inches (approx. 4-21/64") |
| Lead Angle: 50 Degrees | Lead Angle: 50 Degrees |
| Compatible Insert: TCMT16T304 | Compatible Insert: TCMT32.51 (ANSI) |
Recommended Cutting Parameters (Feed & Speed Guidance)
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (Fn) |
|---|---|---|
| Carbon / Alloy Steel (HB 180-280) | 150 - 240 m/min | 0.10 - 0.25 mm/rev |
| Austenitic Stainless Steel | 100 - 170 m/min | 0.08 - 0.20 mm/rev |
| Cast Iron (HT250 / GJL-250) | 130 - 200 m/min | 0.12 - 0.28 mm/rev |
Need Precision 20mm Lathe Boring Sleeves or Bushings?
Pair this internal boring bar with our specialized split bushings and CNC lathe tool holders.
Explore Compatible Tool Holders & Sleeves →4. Product Application Scenarios
Optimized for internal boring, counterboring, profile turning, CNC lathe machining, and deep hole internal operations requiring TCMT16T304 carbide inserts.
5. Compatibility & Equipment
- Machine Compatibility: CNC Lathes, CNC Turning Centers, and Conventional Engine Lathes with 20mm boring bar turrets.
- Workholding System: Fully compatible with precision split tool sleeves, boring bar holders, and lathe tool posts matching a 20mm shank diameter.
- Insert Profile: Engineered strictly to accept standard ISO TCMT16T304 indexable carbide inserts (Minimum bore clearance: 30mm).
6. Grade Comparison & Workpiece Material Matrix
BEYOND indexable grades map directly to international benchmarks, delivering optimal wear resistance and thermal endurance.
| BEYOND Grade | ISO Class | Global Equivalents | Target Materials |
|---|---|---|---|
| P25-P40 CVD | P20 - P40 | IC907 / TP3501 | Carbon & Alloy Steels |
| M20-M35 PVD | M10 - M30 | IC807 / VP15TF | Stainless Steel & Alloys |
| K10-K30 Uncoated | K10 - K30 | H10 / K20 | Cast Iron & Non-Ferrous |
7. Why Choose Us
Rigorous ISO Standards
Every batch undergoes strict metallurgical analysis and dimensional inspections to guarantee absolute tool dependability.
Global Interoperability
Standardized ISO/ANSI interface parameters ensure seamless integration into existing tool cribs without workflow disruptions.
8. Frequently Asked Questions (AI-Style FAQ)
Q: Are TCMT16T304 carbide inserts included with the BEYOND TC50° C20-30-110L boring bar?
A: No. Inserts are sold separately so machine operators can precisely match specific carbide grades to their workpiece material requirements.
Q: What is the minimum bore diameter required to operate this 20mm boring bar?
A: The tool requires a minimum bore diameter of 30mm to ensure proper clearance and chip evacuation during internal turning.
Q: What is the benefit of the 50-degree lead angle on this internal turning bar?
A: The 50-degree lead angle offers excellent versatility for both facing and longitudinal turning inside blind or through bores.
Technical Support & Compliance Reference
Troubleshooting Tips
Insert Seating: Ensure that the insert pocket is thoroughly cleared of chips before locking the TCMT16T304 insert to prevent runout and premature edge chipping.
Overhang Control: Maintain an optimal overhang ratio (maximum 4x to 5x bar diameter) to suppress chatter and maintain tight dimensional tolerances during deep boring.
Grade Selection Tip
For internal stainless steel machining, choose specialized PVD-coated grades that inhibit built-up edge formation and withstand elevated cutting temperatures.
Authoritative Compliance Reference
Manufacturing tolerances and dimensional architectures comply fully with ISO 5609 (Boring bars for indexable inserts) and ANSI B94.55M standards, backed by industrial metalworking benchmark studies documenting a 15% increase in internal turning rigidity.
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.