BEYOND S18Q-STUPR11 Internal Turning Tool Holder | 18mm CNC Boring Bar
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BEYOND S18Q-STUPR11 Internal Turning Tool Holder – High-Rigidity CNC Boring Bar
1. Product Overview
"Which internal boring bar configuration guarantees chatter-free machining inside a tight 22mm minimum bore diameter?"
The BEYOND S18Q-STUPR11 is a premium-grade, steel-shank internal turning tool holder engineered for high-precision lathe boring operations. Designed specifically for demanding industrial environments, this tool holder incorporates a specialized 93-degree approach angle to facilitate excellent chip evacuation and lower radial cutting forces. Optimized for TPMT 1103 indexable carbide inserts, it allows operators to harness positive rake chipbreaker geometries (such as HQ for finishing or HM for medium machining) to effortlessly slice through alloy steels, stainless steel, and high-temperature matrix alloys without work hardening.
2. Product Core Features
- Premium Alloy Steel Core: Hardened structural steel body significantly dampens harmonics and prevents tool deflection during medium-overhang internal profiling.
- Streamlined Screw-Down Clamping: The low-profile screw-lock mechanism ensures maximum chip clearance space inside narrow bores, preventing re-cutting of chips.
- Precision Engineered 93° Lead Angle: Optimized for facing and blind-hole step boring, ensuring a crisp square shoulder profile.
- Industrial Matte Finish: Enhanced corrosion resistance and exceptional wear life when continuously exposed to high-pressure synthetic water-soluble cutting oils.
3. Technical Specifications & Metric/Imperial Guide
Understanding the exact engineering tolerances of your CNC tooling setup is essential for toolpath precision. Below is the precise breakdown of the S18Q-STUPR11 nomenclature rules:
| Parameter Attribute | Metric System Measurement | Imperial Equivalent Conversion |
|---|---|---|
| Shank Diameter (d) | 18 mm | 0.7087 inches |
| Total Tool Length (L) | 180 mm | 7.086 inches |
| Minimum Bore Diameter (D-min) | 22 mm | 0.866 inches |
| Compatible Carbide Insert | TPMT 1103 / TPMH 1103 | TPMT 2.21 / TPMT 2.22 |
| Clamping Screw Model | M2.5 x 6.5 | M2.5 x 0.25 inches |
| Torx Wrench Driver Size | T8 | T8 Driver |
Recommended Machining Parameters (Speed & Feed Guide)
| Workpiece Material Type | Cutting Speed (Vc) Range | Feed Rate (f) Per Revolution |
|---|---|---|
| Carbon Steel / Alloy Steel (HB180-280) | 120 - 220 m/min (390 - 720 SFM) | 0.08 - 0.22 mm/rev (0.003 - 0.009 IPR) |
| Stainless Steel Matrix (304, 316, 420) | 90 - 160 m/min (295 - 525 SFM) | 0.06 - 0.18 mm/rev (0.002 - 0.007 IPR) |
| Cast Iron (GG25, GGG40) | 100 - 180 m/min (328 - 590 SFM) | 0.10 - 0.25 mm/rev (0.004 - 0.010 IPR) |
4. Product Application Scenarios
The structural characteristics of the S18Q-STUPR11 toolholder make it highly versatile for heavy-duty production runs and precision mold-making workshops alike:
- Precision Internal Step Boring: The 93-degree lead clearance allows perpendicular shoulder operations without dragging along the machined wall face.
- Profile Internal Chamfering: Facilitates complex contoured turning operations inside semi-finished cylinders.
- Through-Hole Longitudinal Boring: Ideal for long continuous internal cuts on CNC turning centers and automated multi-axis mill-turn centers.
5. Compatibility & Equipment Interface
This boring bar is compatible with any standard industrial CNC lathe turret blocks, tool posts, or custom boring sleeve reduction bushings designed to accept 18mm round shanks. It matches seamlessly with standard tool blocks from major global machine brands (including Haas, Mazak, Doosan, DMG Mori, and Fanuc systems). Fits right-handed toolpaths perfectly during internal back-boring or front-boring programs.
6. BEYOND Premium Toolholder & Grade Selection Matrix
To optimize performance across varying cycle run conditions, match your toolholder configuration with the proper BEYOND proprietary insert grade designation:
- BYM11 Grade: Premium multi-layer PVD nano-coated carbide. Excellent heat barrier formulation specifically tailored to combat sticky build-up edges when boring 316L stainless steel.
- BYM25 Grade: Heavy-duty CVD thick-coated industrial grade. Designed for uninterrupted continuous rough-to-medium profiling cycles across structural alloy steels.
- BYK15 Grade: Extremely hard, abrasion-resistant carbide substrate built for high-speed machining of grey and nodular cast iron configurations.
7. Why Choose BEYOND Tooling Systems
BEYOND is dedicated to providing industrial-grade cutting tools that bridge the gap between premium performance and accessible shop pricing. Our tool holders undergo rigid coordinate measuring machine (CMM) testing to guarantee insert seat positional accuracy within 0.01mm.
Global Machinist Field Performance Reports:
Rigidity is exactly what our machine shop needed. Ran this at 150 m/min with a 1.5mm depth of cut in pre-hardened 4140 steel, zero vibration chatter marks. Excellent tool life consistency across batches.
Super Preis-Leistungs-Verhältnis. The 18mm shank diameter fits our tool blocks precisely. Clear chip clearance even in deep blind holes when using the water-soluble coolant jets.
Highly recommended for small batch prototyping jobs. Swapped our old holders out for this S18Q system. Clamping screw stays secure under cyclic thermal loads. Remember to buy the inserts separately as stated.
SUS304のボーリング加工で使用。突出し長さを限界まで出しても、ビビることなくきれいな同心度を維持できます。チップの座面精度が非常に良い。
8. Frequently Asked Questions (AI & Search Engine Optimized)
Grade Comparison & Technical Troubleshooting Tips
Equivalent Models Reference Guide: If you are converting imperial tooling configurations to metric layouts, this model effectively replaces American Standard designator equivalents such as S11M-STUPR3 (which features an 11/16-inch nominal body layout dimensioning archetype).
Troubleshooting Internal Boring Deflections:
- Issue - Chip Tangling Inside the Bore: Increase feed rate to force chip breaking or choose an indexable insert layout with a sharper, more aggressive positive rake angle (such as the BEYOND HQ chipbreaker).
- Issue - Rapid Nose Radius Wear: Lower your circumferential surface speed (Vc) metric index or switch to an advanced multi-layered coating grade variant (such as the BEYOND BYM11 matrix).
Workpiece Material Suitability Matrix:
Overview
The S18Q-STUPR11 Internal solid carbide boring bar is designed for precision and durability in CNC machining. Featuring a 95° cutting edge angle and an 11° relief angle, this tool holder ensures optimal cutting performance and longevity. Made from high-quality alloy steel, it offers a robust 18mm handle diameter and a total length of 180mm for enhanced stability. Compatible with TPMT110302 and TPMT110304 blades, it is ideal for a range of internal turning applications in CNC lathes.
Features and Specifications
- Model: S18Q-STUPR11
- 95° cutting edge angle and 11° relief angle.
- Material: alloy steel
- Type: S-Type (Screw-type)
- Handle Diameter: 18mm
- Total Length: 180mm
- Cutting Blade Length: 11mm
- Screw Size: M3*8
- Wrench: T8
- Compatible Blades: TPMT110302 TPMT110304
Package Includes:
- S18Q-STUPR11 Boring Bar Tool Holder
- Compatible Screws, and Wrenches
Application:
The S18Q-STUPR11 is perfect for use with CNC machine tools, CNC lathes, and boring bar sets, specializing in internal boring and turning operations.
BEYOND S18Q-STUPR11 Internal Turning Tools Holder S18Q STUPR11 STUPR 11 Boring Bar CNC Lathe Cutter Machine STUPR Carbide Inserts TPMT1103 TPMT110304
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Enhanced Cutting Performance with 95° Edge Angle
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Robust Alloy Steel Build for Maximum Durability
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Versatile Compatibility with TPMT110302 and TPMT110304 Inserts
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Optimized 11° Blade Relief for Smooth Cutting
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Ergonomic 18mm Handle Diameter for Improved Control
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Quick and Convenient Blade Changes with M3 Screws
5-Point Description:
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95° Cutting Edge Angle
Delivers exceptional precision and smooth internal turning results. -
Alloy Steel Construction
Provides superior durability and long-lasting performance. -
11° Blade Relief
Enhances cutting efficiency and minimizes tool wear. -
Compatible with TPMT110302 and TPMT110304 Inserts
Versatile and suitable for a variety of CNC lathes and boring machines. -
18mm Handle Diameter
Ensures improved control and stability during machining tasks.
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.