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.
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.