BEYOND SP C32-4D-SD27-SP07 Indexable U-Drill Body | 27mm 4D CNC Deep Hole Drill
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BEYOND SP C32-4D-SD27-SP07
27mm 4D Heavy-Duty U-Drill | Precision Blind Hole Boring Specialist
High-Performance 27mm Deep Hole Boring Solution
The BEYOND SP C32-4D-SD27-SP07 is a premium indexable insert drill specifically engineered for high-stability deep hole boring. With a 27mm cutting diameter and a 4D depth ratio (108mm reach), it is the industry standard for blind hole machining. Equipped with internal cooling and a high-precision spiral flute, it ensures rapid chip evacuation and extended tool life on CNC lathes.
Decoding the Model: SP C32-4D-SD27-SP07
Metric & Imperial Technical Specifications
| Feature | Metric (mm) | Imperial (Inch) |
|---|---|---|
| Drilling Diameter (SD) | 27.0 mm | 1.063" |
| Shank Diameter (C) | 32.0 mm | 1.260" |
| Max Drilling Depth (4D) | 108.0 mm | 4.252" |
| Equivalent Model | SP-C1.25-4D-SD1.063-SP07 | |
Advanced 20CrMnTi Alloy & High-Efficiency U-Groove
Superior Tool Body Material: The tool is manufactured from premium 20CrMnTi alloy steel, subjected to vacuum quenching for a surface hardness of HRC 52-55. This ensures the indexable drill body maintains extreme rigidity and wear resistance during large diameter drilling operations.
Optimized Chip Slot Geometry: Featuring a specialized spiral flute (U-groove), the design maximizes chip evacuation space. Combined with internal cooling holes, it allows for high-pressure fluid to flush out metal chips instantly, crucial for maintaining accuracy in 108mm blind hole machining.
Recommended Cutting Parameters (27mm 4D)
Suggested for General Steel (HB < 250). Please adjust based on material hardness:
- Cutting Speed (Vc): 110 - 180 m/min
- Feed Rate (f): 0.06 - 0.14 mm/rev
- Rotation Speed (N): Calculated as $$N = \frac{Vc \times 1000}{\pi \times 27}$$
- Coolant: High-pressure internal cooling is mandatory to prevent thermal buildup.
Need a heavy-duty side-lock holder for this 32mm shank?
VIEW COMPATIBLE C32 HOLDERSGlobal Customer Feedback
"Highly Robust"
"I use the 27mm for deep blind holes in tool steel. The 4D reach is stable and the finish is excellent."
- Marcus L. (USA)
"Flawless Chip Evacuation"
"Internal coolant combined with the spiral flute clears chips perfectly. No more tool breakage!"
- Jurgen W. (Germany)
"Excellent tool body. Better price than local suppliers in Mexico. Performance is top tier."
- Ricardo M. (Mexico)
"The square SP inserts leave a very flat bottom. Perfect for my hydraulic block production."
- Tom H. (UK)
"Precise and durable. Switched our workshop to BEYOND and saved 30% on tool costs."
- Kenji A. (Japan)
SP Series Indexable Drill: Performance Analysis
- Uses 4-edge SPMG square inserts for maximum efficiency.
- Engineered for Blind Hole Machining (Flatter hole bottom).
- Reinforced body core for superior 4D rigidity.
- Requires higher machine torque than WC drills.
- Highly dependent on high-pressure coolant for deep 4D holes.
Technical Q&A
Q: Why choose SP over WC for blind holes?
A: SP square inserts provide a flatter profile at the bottom of the bore. The tool body is also thicker, providing the rigidity needed for deep holes.
Q: Does this product include carbide inserts?
A: No, this is for the tool body only. It is compatible with SPMG07T308 carbide inserts.
Q: Can I use this on a manual lathe?
A: It is highly recommended for CNC machines due to the required rotation speed and high-pressure coolant needs.
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 4D deep hole boring.
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 than SP for extreme depths.
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.