BEYOND SP C40-2D-SD49-SP14 Indexable U-Drill Body | 49mm 2D CNC Boring Drill
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BEYOND SP C40-2D-SD49-SP14
49mm 2D Heavy-Duty U-Drill | Large Diameter Blind Hole Specialist
Industrial-Grade 49mm Indexable Boring Solution
The BEYOND SP C40-2D-SD49-SP14 is a powerhouse indexable insert drill designed for high-efficiency CNC boring in heavy industry. With a 49mm cutting diameter and a 2D depth ratio (98mm reach), this tool is optimized for blind hole machining. Featuring internal cooling and reinforced spiral flutes, it offers exceptional chip control and structural rigidity for large-diameter drilling in steel and alloy materials.
Decoding the Model: SP C40-2D-SD49-SP14
Metric & Imperial Technical Specifications
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Drilling Diameter (SD) | 49.0 mm | 1.929" |
| Shank Diameter (C) | 40.0 mm | 1.574" |
| Max Drilling Depth (2D) | 98.0 mm | 3.858" |
| Equivalent Model | SP-C1.57-2D-SD1.92-SP14 | |
Heavy-Duty 20CrMnTi Build & Precision Chip Grooves
Material Strength: This indexable drill body is forged from premium 20CrMnTi alloy steel and treated with vacuum quenching (HRC 52-55). This ensures the extreme rigidity needed for large diameter drilling without tool vibration. The Black Oxide surface provides superior heat resistance for intense CNC boring operations.
The Spiral Flute: The U-drill features an enlarged spiral flute design (U-groove) specifically engineered to evacuate the high volume of chips produced by a 49mm diameter. Integrated internal cooling ports deliver high-pressure fluid directly to the SPMG14 inserts, preventing heat buildup in blind hole machining.
Recommended Cutting Parameters (49mm 2D)
General guidelines for Steel and Alloy Steel. Note: High torque is required for this diameter.
Rotation Speed (N) = (Vc × 1000) / (π × 49)
Vc = Cutting Speed | π ≈ 3.14 | D = 49mm
- Cutting Speed (Vc): 100 - 180 m/min
- Feed Rate (f): 0.08 - 0.15 mm/rev
- Coolant: High-pressure internal cooling is mandatory for large-diameter boring.
Pair with a heavy-duty BEYOND Side-Lock C40 Holder for maximum stability:
SHOP COMPATIBLE C40 TOOL HOLDERSVerified Global Reviews
"Incredible core strength"
"Using this for 49mm blind bores in 1045 steel. No vibration and very clean hole bottoms."
- Robert T. (USA)
"Excellent chip breaking. The spiral flute is designed perfectly for this size."
- Klaus S. (Germany)
"High-end finish. The coolant pressure stays consistent throughout the bore."
- G. Moretti (Italy)
"Reliable industrial tool. Our machine shop has switched to BEYOND for all large U-drills."
- J. Anderson (Canada)
"SP inserts are much more cost-effective for these large holes. 4 edges!"
- M. Sato (Japan)
SP Series Indexable Drill: Advantages & Considerations
- Uses SPMG square inserts with 4 usable edges—economical for large holes.
- Optimized for Blind Hole Machining with a flatter hole bottom.
- Reinforced body core designed for high-torque 49mm operations.
- Requires high-power CNC machines to maintain speed for 49mm bores.
- Needs high coolant volume due to the massive chip production.
Technical Q&A
Q: Why choose SP over WC for 49mm bores?
A: SP square inserts provide a flatter profile at the hole bottom. Furthermore, at 49mm, the SP body core is structurally thicker, minimizing vibration compared to WC designs.
Q: Is this body compatible with all SPMG14 inserts?
A: It fits standard SPMG140512 carbide inserts. For optimal results, use BEYOND inserts matched to your specific material.
Q: What is the maximum depth for this 2D drill?
A: The 2D indicates 2x the diameter. For a 49mm drill, the maximum effective drilling depth is 98mm.
Machinist Tip: SP vs. WC U-Drills
SP Series (Square): The professional choice for Blind Hole (Blind Bores). Square inserts create a flatter bottom and offer maximum core strength for large diameter machining.
WC Series (Trigon): Primarily used for Through Hole applications. WC inserts offer more edges but the body core is thinner, making it less rigid for 49mm tasks.
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.