BEYOND SP C32-5D-SD29.5-SP09 Indexable U-Drill | 29.5mm CNC Deep Hole Drill Body
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BEYOND SP C32-5D-SD29.5-SP09
29.5mm 5D Indexable U-Drill | Professional Blind Hole Boring Body
High-Performance 29.5mm Deep Hole Drilling
The BEYOND SP C32-5D-SD29.5-SP09 is a premium indexable insert drill designed for high-precision metal removal. With a 29.5mm cutting diameter and a massive 5D depth ratio, this fast hole U-drill is specifically optimized for blind hole boring on CNC lathes. Its internal cooling technology ensures maximum tool life and efficient chip evacuation during high-speed drilling.
Model Breakdown (Specifications)
Metric & Imperial Sizing Reference
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Drilling Diameter (SD) | 29.5 mm | ~1.161" |
| Shank Diameter (C) | 32.0 mm | 1.259" |
| Max Drilling Depth (5D) | 147.5 mm | 5.807" |
| Imperial Equivalent Model | SP-C1.25-5D-SD1.161-SP09 | |
20CrMnTi Alloy & High-Efficiency Spiral Flute
Premium Body Material: Manufactured from 20CrMnTi alloy steel, this U-drill body undergoes vacuum quenching to reach HRC 50-55. This results in a highly wear-resistant surface while maintaining a tough core to handle interrupted cuts and high torque during shallow hole drilling.
Optimized Spiral Flute: The specialized U-groove geometry provides extra-large chip slots. Combined with dual internal cooling holes, it allows high-pressure coolant to flush metal chips out of 147.5mm deep holes instantly, preventing chip packing and protecting the carbide inserts from heat failure.
Recommended Cutting Parameters (5D 29.5mm)
Baselines for Carbon Steel (HB < 250). Adjust for machine rigidity:
- Cutting Speed (Vc): 110 - 155 m/min
- Feed Rate (f): 0.08 - 0.14 mm/rev
- Rotation Speed (N): Calculated as $$N = \frac{Vc \times 1000}{\pi \times 29.5}$$
- Coolant Requirement: High-pressure internal cooling (Min 1.5 MPa) is mandatory for 5D.
SP Series U-Drill: Pros and Cons
- Uses SPMG square inserts with 4 usable cutting edges (High economy).
- Exceptional stability for Blind Hole Machining.
- High core thickness ensures minimal deflection at 147.5mm reach.
- Requires higher spindle power/torque for 29.5mm diameters.
- Coolant pressure must be consistent to prevent chip clogging.
Verified Customer Feedback
"Best for Blind Holes"
"Switched from WC to this SP drill for blind bores. Bottom finish is much flatter and cleaner."
- Robert H. (USA)"Rugged Body"
"The 20CrMnTi material is tough. Survived a small operator error with zero damage. Great value."
- Klaus W. (Germany)"Highly recommended for CNC shops"
- Kenji Y. (Japan)
"Excellent 5D stability"
- Marc L. (France)
"Fast delivery to UK"
- Liam G. (UK)
Technical Q&A
Q: Why use the SP series for blind holes?
A: SP square inserts provide a flatter hole bottom profile and higher rigidity, which is crucial when you are not exiting the material.
Q: What is the benefit of the Side-Lock (C32) shank?
A: The 32mm straight shank allows for massive clamping force in side-lock holders, preventing the tool from rotating under high torque.
Q: Do I need a pilot hole?
A: For 5D (147.5mm), we recommend starting with a 1D or 2D short U-drill to ensure the deep hole tool enters straight.
Technical 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 5D depths.
WC Series (Trigon): Primarily used for Through Hole applications. WC inserts offer more cutting edges but the body is slightly less rigid than SP at extreme depths.
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.