BEYOND SP C40-2D-SD36.5-SP14 Indexable U-Drill Body | 36.5mm 2D CNC Boring Drill
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BEYOND SP C40-2D-SD36.5-SP14
36.5mm 2D Heavy-Duty U-Drill | Precision Blind Hole Boring Specialist
High-Efficiency 36.5mm Indexable Boring Solution
The BEYOND SP C40-2D-SD36.5-SP14 is a professional-grade indexable insert drill engineered for high-torque CNC boring and large-diameter metal removal. With a 36.5mm cutting diameter and a 2D depth ratio (73mm reach), this tool is the industry benchmark for blind hole machining. Featuring dual internal cooling ports and a precision-engineered spiral flute, it ensures rapid chip evacuation and superior surface finish in carbon steel, alloy steel, and stainless steel.
Model Breakdown: SP C40-2D-SD36.5-SP14
Metric & Imperial Technical Specifications
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Drilling Diameter (SD) | 36.5 mm | 1.437" |
| Shank Diameter (C) | 40.0 mm | 1.574" |
| Max Drilling Depth (2D) | 73.0 mm | 2.874" |
| Equivalent Model | SP-C1.57-2D-SD1.43-SP14 | |
Premium 20CrMnTi Alloy & Rapid-Flow Chip Flutes
Forged Strength: This indexable drill body is forged from high-quality 20CrMnTi alloy steel and vacuum quenched (HRC 52-55). This provides the essential core rigidity required for large diameter drilling stability and minimizes tool deflection during heavy-duty cycles. The surface is treated with a Black Oxide finish for superior thermal protection during rapid hole boring.
Advanced Slot Geometry: The U-drill features an optimized spiral flute (U-groove) specifically shaped to handle the high volume of metal chips produced by a 36.5mm bore. The internal cooling holes ensure that coolant reaches the cutting edge directly, flushing chips away and preventing heat buildup, which is vital for successful blind hole machining.
Recommended Cutting Parameters (36.5mm 2D)
Optimal settings for General Steel. Adjust based on CNC rigidity and material grade:
Rotation Speed (N) = (Vc × 1000) / (π × 36.5)
Vc = Cutting Speed | π ≈ 3.14 | D = 36.5mm
- Cutting Speed (Vc): 110 - 190 m/min
- Feed Rate (f): 0.10 - 0.20 mm/rev
- Coolant: Center-through internal cooling is mandatory for chip evacuation.
Pair with a high-rigidity BEYOND Side-Lock C40 Holder for maximum precision:
SHOP COMPATIBLE C40 TOOL HOLDERSVerified Customer Feedback
"Solid industrial build"
"I'm using this for 36.5mm blind holes in 1045 steel. Rigidity is excellent and the bottom finish is clean."
- David K. (USA)
"Top quality. The internal coolant ports are aligned perfectly with the flutes."
- Marek W. (Poland)
"Fits SPMG14 inserts with zero play. Very impressed with the Beyond brand."
- Pedro S. (Brazil)
"Great value for money. Fast shipping to the UK."
- Arthur L. (UK)
"Stays stable even at max feed rate. A solid shop staple."
- Y. Watanabe (Japan)
SP Series Indexable Drill: Advantages & Considerations
- Uses 4-edge SPMG square inserts (Cost-effective).
- Optimized for Blind Hole Machining (Flatter hole bottom profile).
- Higher body core thickness for maximum stability at 36.5mm.
- Higher power consumption compared to smaller diameter tools.
- Strictly requires high-pressure internal coolant for chip flushing.
Technical Q&A
Q: Why should I choose the SP series over WC for this size?
A: The SP series uses square inserts which are much better suited for blind hole machining because they create a flatter bottom and the tool body itself is more rigid for large-diameter CNC boring.
Q: Is this drill body compatible with other insert brands?
A: It is standard-spec for SPMG140512 carbide inserts. While many brands fit, we recommend BEYOND inserts for the tightest tolerances.
Q: Can this be used on a manual lathe?
A: It is designed for CNC machines. Manual machines often lack the RPM and torque stability required for a 36.5mm U-drill.
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.
WC Series (Trigon): Primarily used for Through Hole applications. WC inserts offer more cutting edges but the body core is thinner, making it slightly less rigid for heavy 36.5mm boring 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.