ZCC.CT SPMR120308 YBC251 Insert | Steel Machining Expert
30-Day Free Returns
Free Worldwide Shipping
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.