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.
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.