ZCC.CT TCMT220408-HR YBM251 Carbide Turning Inserts for Stainless Steel Roughing
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ZCC.CT TCMT220408-HR YBM251
Heavy-Duty Roughing Inserts for ISO M Stainless Steel
Product Overview
"Which insert is best for heavy roughing of stainless steel with interrupted cuts while maintaining stable chip breaking?"
The ZCC.CT TCMT220408-HR YBM251 is a powerhouse designed for the most demanding ISO M (Stainless Steel) applications. Combining the legendary YBM251 CVD grade with the aggressive -HR (Heavy Roughing) chipbreaker, this insert excels in removing large volumes of material. The unique geometry is engineered to prevent notch wear and handle the high thermal loads typical of austenitic and duplex stainless steels.
Key Performance Features
-HR Roughing Geometry
Reinforced cutting edge designed for large depths of cut (Ap) and high feed rates in tough materials.
YBM251 CVD Grade
A specialized coating with superior impact toughness and resistance to thermal cracking.
Optimized Chip Control
The HR breaker forces short, manageable chips even in "stringy" stainless steel alloys.
Technical Specifications
ISO Designation Decoding
Triangular
7° Relief
Tolerance
W/Hole
Edge (mm)
Thick (mm)
Rad (mm)
Roughing
| Standard | Model Designation | Inscribed Circle / Rad |
|---|---|---|
| Metric (ISO) | TCMT220408-HR | 12.7mm / 0.8mm |
| Imperial (ANSI) | TCMT432-HR | 1/2" / 1/32" |
Recommended Cutting Parameters
| Workpiece Material | Speed (Vc m/min) | Feed (f mm/rev) |
|---|---|---|
| Austenitic Stainless (304/316) | 120 - 220 | 0.25 - 0.55 |
| Duplex Stainless Steel | 80 - 160 | 0.20 - 0.45 |
Recommended Tool Holder:
Industrial Applications
- Heavy Roughing: Large material removal on stainless steel castings and forgings.
- Interrupted Cuts: Stable performance on parts with keyways or cross-holes.
- High Temperature: Maintains edge hardness in heat-resistant alloys.
Machine Compatibility
Fits all standard ISO turning tool holders (Internal or External) designed for TCMT 22 size inserts. Optimized for medium to large-scale CNC Lathes and Heavy-Duty machining centers.
ZCC.CT Grade Comparison (Stainless Steel)
| Grade | Type | Best For |
|---|---|---|
| YBM151 | CVD | High Speed / Finishing |
| YBM251 (Current) | CVD | General Purpose / Roughing |
| YBM351 | CVD | Interrupted / Heavy Roughing |
Voices From the Shop Floor
"Aggressive chip breaker"
Finally found an insert that breaks chips in 304 without killing the edge too fast. -HR is a beast.
— Robert D., USA 🇺🇸"Top für Edelstahl"
The YBM251 grade handles the heat very well. Using it for large valve bodies.
— Dieter S., Germany 🇩🇪"Affidabile"
Fast delivery and original ZCC.CT quality. Great performance on duplex.
— Luca P., Italy 🇮🇹Technical FAQ
Q: When should I choose -HR over -HM chipbreaker?
A: Choose -HR (Heavy Roughing) when your depth of cut is large or you are dealing with very inconsistent casting skins. For lighter semi-finishing, -HM is better.
Q: Can I use YBM251 for dry machining?
A: While the CVD coating handles heat well, high-volume coolant is strongly recommended for stainless steel to help with chip evacuation and reduce built-up edge.
Q: Does this work on Inconel or Titanium?
A: It can handle some high-temp alloys, but YBM251 is primarily optimized for ISO M (Stainless). For S-class materials, please consult our specific grade guide.
Need Help With ZCC·CT Inserts?
Looking for a ZCC·CT 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 ZCC·CT 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.