ZCC.CT SPMR120308 YBC251 Insert | Steel Machining Expert
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SPMR120308 YBC251
High-Performance Indexable Carbide Inserts
Model Specification Breakdown
Understanding the precision behind the SPMR 120308 nomenclature:
| Standard | Model Designation | Inscribed Circle (IC) | Thickness (S) |
|---|---|---|---|
| ISO (Metric) | SPMR120308 | 12.70 mm | 3.18 mm |
| ANSI (Inch) | SPMR 432 | 0.500" | 0.125" |
YBC251 Grade: The Steel Specialist
The YBC251 grade features ZCC.CT's advanced CVD (Chemical Vapor Deposition) coating, consisting of a thick TiCN layer and an Al2O3 layer. This creates a "Black Diamond" finish that provides the perfect balance of wear resistance and impact toughness.
- High-temperature stability
- Superior chip control (medium-to-roughing)
- Excellent for finishing carbon & alloy steel
- Resistant to micro-chipping
Recommended Cutting Parameters
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Low Carbon Steel | 200 - 350 m/min | 0.15 - 0.40 mm/r | 0.5 - 3.0 mm |
| Alloy Steel | 150 - 280 m/min | 0.10 - 0.35 mm/r | 0.5 - 2.5 mm |
Frequently Asked Questions (Q&A)
Q: Is SPMR120308 suitable for stainless steel?
A: While YBC251 is optimized for steel (P-class), it can handle light stainless steel cutting, but for dedicated stainless work, we recommend YBM251 grade.
Q: What is the difference between YBC251 and YBC252?
A: YBC251 is more focused on finishing to medium cutting with higher wear resistance, while YBC252 offers higher toughness for interrupted cuts.
Customer Reviews
Used these on 4140 steel, and the wear resistance of YBC251 is better than more expensive brands.
Excellent surface finish on our CNC lathes. The SPMR 120308 dimensions are very consistent.
Switching to ZCCCT saved us 30% on tooling costs without sacrificing quality.
The chip control is very stable even at higher feed rates. Fast shipping!
We use these daily for medium cutting. Highly recommended indexable inserts.
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.