BEYOND S20R-SVJBR11 Internal Turning Tool Holder for VBMT 1103 Inserts
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✓ Global Shipping: Delivery: generally 5–20 business days, depending on destination and shipping method.
✓ Guaranteed Quality: Check model, dimensions and compatibility before ordering. | Direct Factory Outlet
✓ Technical Support: Need grade selection help? Contact Engineer
💰 Bulk savings 2-9 pcs · 6% OFF | 10+ pcs · 12% OFF
⚠️ PLEASE NOTE: TOOL HOLDER ONLY
Carbide inserts shown in images are for demonstration purposes only and are NOT included. Please order compatible inserts (VBMT 1103 / VCMT 1103) separately.
BEYOND S20R-SVJBR11 Internal Turning Tool Holder
1. Product Overview
User Query Context: "Which internal boring bar allows the best chip clearance and tool rigidity when machining a tight 93-degree shoulder inside medium-carbon steel using VBMT inserts?"
The BEYOND S20R-SVJBR11 is a professional-grade, indexable steel internal boring bar engineered for precision internal turning and profiling inside medium to large bores. Utilizing a highly stable screw-down clamping mechanism, it pairs perfectly with 35-degree rhombic VBMT 1103 or VCMT 1103 carbide inserts. Its geometry provides a 93° approach angle, which redirects cutting forces along the axis of the tool holder to drastically eliminate chatter and ensure seamless chip evacuation during deep internal profiling in steel, alloy, and stainless steel workpieces.
2. Product Key Features
- Premium Cr-Mo Alloy Steel Body: Forged from high-tensile chromium-molybdenum alloy steel and quenched to HRC42-45 to maintain supreme rigidity and structural stability under heavy mechanical stress.
- Optimized 93° Lead Angle: Specially calculated clearance angle for seamless internal 90-degree step profiling, allowing the tool to turn profiles without rubbing against the workpiece walls.
- Stable Screw-Down Clamping: Features a low-profile pocket design that clamps the insert tightly down using an alloy screw, preserving continuous structural alignment during aggressive cuts.
- Anti-Vibration Coating: Coated with a specialized industrial matte finish that dampens high-frequency harmonic vibrations, directly extending insert edge life.
3. Technical Specifications & Cutting Parameters
Model Designation Nomenclature Decoder
Steel Shank
20mm Shank
200mm Length
Separator
Screw Clamp
35° Insert Geometry
93° Lead Angle
Normal Clearance
Right-Hand Tool
For VBMT 11..
| Specification Metric | Metric Value | Inch Equivalent System | Inch Value |
|---|---|---|---|
| Model Number | S20R-SVJBR11 | ANSI / Inch Model | A12R-SVJBR3 |
| Shank Diameter (d) | 20 mm | Shank Diameter (Inch) | 0.750" (3/4 inch) |
| Overall Length (L) | 200 mm | Overall Length (Inch) | 7.87" |
| Minimum Bore (D min) | 25 mm | Minimum Bore (Inch) | 0.984" |
| Compatible Insert | VBMT 1103.. / VCMT 1103.. | ANSI Insert Designation | VBMT 33.. |
Recommended Cutting Parameters
| Material Group | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon/Alloy Steel (P) | 120 - 250 m/min | 0.08 - 0.22 mm/rev | 0.2 - 1.5 mm |
| Stainless Steel (M) | 90 - 180 m/min | 0.05 - 0.15 mm/rev | 0.2 - 1.2 mm |
Looking for matching high-performance turning inserts?
🛒 Browse Compatible VBMT 1103 Inserts Collection4. Product Applications
The S20R-SVJBR11 boring bar is specifically designed for high-precision manufacturing workflows:
- 90-Degree Square Shoulder Boring: The 93° lead allows seamless internal step turning and blind hole boring.
- Internal Copy Turning: Excellently routes complex internal geometries and profiles without tool body interference.
- Target Fields: Extensively utilized in automotive drivetrain machining, hydraulic valve cylinders, aerospace sleeve components, and custom job shop production.
5. Compatibility Guide
- CNC Turrets & Tool Posts: Directly locks into standard CNC block turrets, block sleeves, or traditional engine lathe quick-change tool posts that support 20mm round shanks.
- Insert Profiles: Standardized pocket matches all universal VBMT 110302, VBMT 110304, VBMT 110308, and VCMT 110304 insert designations.
6. BEYOND Premium Grade Comparison Matrix
Optimize your internal lathe operations by pairing the S20R-SVJBR11 with our specialized carbide insert substrate grades:
| BEYOND Carbide Grade | Coating Technology | Primary Application Field | Hardness Range |
|---|---|---|---|
| BY8150 | Nano-PVD TiAlN | Universal Steel Finishing to Medium-Duty Machining | HRC 20 - 45 |
| BY8200 | Thick CVD TiCN + Al2O3 | High-Speed Continuous Turning & Light Interrupted Cuts | HRC 25 - 50 |
| BY9030 | Premium PVD AlTiCrN | Austenitic Stainless Steels, Inconel & High-Temp Alloys | HRC ≤ 38 |
7. Why Choose BEYOND CNC Tools
BEYOND specializes in manufacturing industrial metal cutting tools that bridge the gap between premium performance and accessible pricing. Engineered with tightly controlled insert pocket dimensions, our tooling lines effortlessly interchange with legacy international standards to keep your machine cycle times low and productivity high.
Global Customer Reviews (Verified Machine Shops)
"Perfect Pocket Tolerances"
The insert sits absolutely flat in the seat. No micro-movements even during medium roughing passes on 1045 steel. Solid tool bar.
— Garrett D., United States 🇺🇸"Sehr gute Oberflächengüte"
Excellent dimensional stability. Swapped out our previous sandvik bar for this on our production line, and it holds the exact same index values.
— Ulrich H., Germany 🇩🇪"Robusto e preciso"
Very tough steel shank. Clears out chips reliably through the internal channel configuration. Delivery was prompt.
— Matteo B., Italy 🇮🇹"びびりが無く安定している"
Beautiful anti-chatter performance. Kept our internal bore dimensions within a 0.015mm tolerance window over long part runs.
— Takashi N., Japan 🇯🇵"Excellent Value for Money"
Hardware package included is heavy-duty. Screw threads are clean, holds standard indexable VBMT 332 inserts perfectly fine.
— Robert K., Canada 🇨🇦8. Expert Engineering FAQ
❓ Q1: What makes the 93° lead angle on the SVJBR bar distinct from an SVQBR bar?
💡 A: The SVJBR profile features a 93° approach angle, perfect for clearing square 90-degree internal steps and deep through-boring with minimal radial deflection. SVQBR uses a 107.5° angle primarily designed for specific backward or copy-profiling routines.
❓ Q2: What chipbreaker geometry works best with this internal boring tool holder?
💡 A: For finishing routines, choose a positive-rake chipbreaker with a tight groove geometry (like our -HF/-EF lines) to break up thin stringy chips inside narrow bores. For general medium roughing, select an all-around -PM/-HM style chipbreaker.
❓ Q3: How far can I safely extend the S20R shank out from the tool holder turret block?
💡 A: For standard steel-shank boring bars, the recommended maximum overhang limit is up to 3 times the shank diameter (equal to $60\text{ mm}$ for this 20mm tool). Extending past this window increases the risk of harmonic chatter patterns.
💡 Technical Maintenance & Troubleshooting Advice
Equivalent Model Cross-Reference: Sandvik Coromant: A20S-SVJBR11 | ISCAR: A20R-SVJBR-11 | Kennametal: A20SSVJBR11D | Walter Tools: A20R-SVJBR11
Troubleshooting Deflection & Chatter: If you notice micro-vibrations appearing on your workpiece internal bore walls, try decreasing the corner radius of your carbide insert (from a 0.4mm down to a 0.2mm configuration). This significantly reduces the contact area and dampens radial pushback force.
All BEYOND production tool holder bars go through rigorous dimensional inspections before leaving the line. Always clean out the pocket with compressed air before seating a new insert.
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.