BEYOND SP C25-3D-SD13.5-SP05 Indexable U-Drill Body | 13.5mm 3D CNC Boring Drill
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BEYOND SP C25-3D-SD13.5-SP05
13.5mm 3D Heavy-Duty U-Drill | Precision Blind Hole Boring Specialist
Industrial-Grade 13.5mm Indexable Boring Solution
The BEYOND SP C25-3D-SD13.5-SP05 is a high-precision indexable insert drill designed for high-efficiency CNC boring. With a 13.5mm cutting diameter and a 3D depth ratio (40.5mm reach), this tool is optimized for blind hole machining. Featuring internal cooling and a high-performance spiral flute, it offers exceptional chip control and surface finish in steel, alloy steel, and stainless steel.
Decoding the Model: SP C25-3D-SD13.5-SP05
Metric & Imperial Technical Specifications
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Drilling Diameter (SD) | 13.5 mm | 0.531" |
| Shank Diameter (C) | 25.0 mm | 0.984" |
| Max Drilling Depth (3D) | 40.5 mm | 1.594" |
| Equivalent Model | SP-C0.984-3D-SD0.531-SP05 | |
High-End 20CrMnTi Build & Precision Chip Grooves
Material Strength: This indexable drill body is forged from 20CrMnTi alloy steel and treated with vacuum quenching (HRC 52-55). This ensures the rigidity needed for large diameter drilling without tool deflection. The Black Oxide surface provides a smooth finish and heat resistance.
The Spiral Flute: The U-drill features an optimized spiral flute design (U-groove) that creates a wide pathway for chip evacuation. Integrated internal cooling holes spray coolant directly to the insert edges, effectively washing out chips—a vital requirement for successful blind hole machining.
Recommended Cutting Parameters (13.5mm 3D)
General guidelines for Carbon Steel and Alloy Steel. Use the formula below for your CNC setup:
Rotation Speed (N) = (Vc × 1000) / (π × 13.5)
Vc = Cutting Speed | π ≈ 3.14 | D = 13.5mm
- Cutting Speed (Vc): 130 - 200 m/min
- Feed Rate (f): 0.05 - 0.10 mm/rev
- Coolant: High-pressure internal cooling is required for deep hole boring.
Pair with a high-rigidity BEYOND Side-Lock C25 Holder for zero vibration:
SHOP COMPATIBLE C25 TOOL HOLDERSVerified Global Reviews
"Excellent 13.5mm Drill"
"I use this for blind holes on my CNC lathe. The 3D reach is perfect and the chip flow is very smooth."
- Jurgen H. (Germany)
"Very rigid. The SPMG05 pockets are high quality. No vibration at all."
- David L. (USA)
"Internal coolant holes work perfectly. Far better than using twist drills."
- Matteo R. (Italy)
"Good value. Shipping was fast."
- Arthur L. (UK)
"Industrial quality. Our machine shop relies on BEYOND."
- S. Takahashi (Japan)
SP Series Indexable Drill: Advantages & Considerations
- Uses SPMG square inserts with 4 usable edges—very cost-effective.
- Designed for Blind Hole Machining with a flatter hole bottom.
- Stronger body core for high-pressure deep hole drilling.
- Requires high horsepower machines to drive indexable inserts effectively.
- Not suitable for use without internal coolant flow.
Technical Q&A
Q: Why choose SP over WC for blind bores?
A: SP square inserts provide a flatter profile at the bottom of the hole. The SP body is also designed with a thicker core, essential for large diameter boring stability.
Q: Is this tool body compatible with all SPMG05 inserts?
A: It fits standard SPMG050204 carbide inserts. For best results, use BEYOND inserts specifically coated for your material.
Q: Can I use this on a manual drill press?
A: No. U-drills require the high torque and rigidity found in CNC Lathes and Milling Machines.
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 cutting edges but the body core is thinner, making it less rigid for 13.5mm 3D 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.