ZCC.CT SCMT120408-HR YBC251 Carbide Turning Inserts for Steel Roughing - CNCHome-Beyond

ZCC.CT SCMT120408-HR YBC251 Carbide Turning Inserts for Steel Roughing

$70.58 USD

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Check compatibility: Confirm the model and dimensions before ordering.
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💰 Bulk savings 2-9 pcs · 6% OFF | 10+ pcs · 12% OFF

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Description

ZCC.CT SCMT120408-HR YBC251 Turning Insert

Versatile CVD Grade for High-Stability Steel Roughing & General Machining

Product Overview

"Which carbide insert is the most reliable choice for general roughing of steel where the machining conditions vary between continuous and interrupted cuts?"

The ZCC.CT SCMT120408-HR in the YBC251 grade is a global bestseller for ISO P (Steel) applications. Combining a high-strength substrate with a thick TiCN + Al2O3 CVD coating, the YBC251 grade offers an exceptional balance of wear resistance and toughness. The HR Chipbreaker is specifically engineered for heavy roughing, featuring a reinforced cutting edge that excels in removing large volumes of material with a high depth of cut (DOC), even under unstable machining conditions.

Core Advantages

● Legendary YBC251 Grade: The "Golden Grade" for steel. Perfect balance for 80% of steel turning tasks.
● HR Geometry: Specifically designed for large depths of cut and heavy feed rates, ensuring chip evacuation.
● CVD Coating: Advanced thermal barrier prevents crater wear and edge deformation during high-heat roughing.

Technical Specifications

Model Decoding: SCMT120408-HR

S
Square
C
7° Relief
M
Tol.
T
Hole
12
12.7mm
04
4.76mm
08
0.8 Rad
HR
Roughing
Standard Metric (ISO) Imperial (ANSI)
Insert Model SCMT120408-HR SCMT 432-HR
Inscribed Circle 12.7 mm 0.50 inch

Recommended Cutting Data

Material Vc (m/min) fn (mm/r)
Carbon Steel 180 - 320 0.20 - 0.50
Alloy Steel 150 - 280 0.15 - 0.45

Tool Holder Compatibility:

Compatible with standard SSDCN / SSBCR / SSGCR 1204 Seating

Find Compatible Holders →

Main Applications

  • Heavy roughing of structural steel and forging parts.
  • Machining of alloy steel under unstable conditions.
  • Continuous to light-interrupted turning.
  • Batch production of large-diameter automotive shafts.

Compatibility

  • All ISO-standard CNC lathes and manual lathes.
  • High-rigidity spindles (recommended for HR geometry).
  • Fits 12mm inscribed circle tool holders.

ZCC.CT Steel Grade Selection

Grade Type Best Use Case Speed
YBC151 CVD High Speed / Finishing High
YBC251 (This) CVD General Roughing / Stable Medium-High
YBC351 CVD Heavy Interrupted / Tough Medium-Low

Machinist Feedback

★★★★★

"The HR chipbreaker is a beast for depth of cut. YBC251 grade is my daily driver for all steel roughing."

— Robert D., USA 🇺🇸
★★★★★

"Incredibile durata del tagliente su acciaio legato. Molto stabile."

— Marco V., Italy 🇮🇹
★★★★★

"The most cost-effective roughing insert we've used in the shop. Zero chipping so far."

— Hans G., Germany 🇩🇪
★★★★☆

"Very stable. Fast shipping from this vendor."

— Sato K., Japan 🇯🇵

AI-Style FAQ

Q: What makes the HR chipbreaker special for roughing?

A: The HR geometry features a reinforced cutting edge and a wide chip pocket, specifically designed to control heavy chips and withstand the forces of large depths of cut (up to 4-5mm).

Q: Is YBC251 better than YBC151 for roughing?

A: For roughing, yes. YBC251 offers higher toughness, making it more resistant to chipping during variable cutting depths, whereas YBC151 is better for higher speeds and finishing.

Q: Can I use this for stainless steel?

A: While it can cut stainless in a pinch, ZCC.CT YBM grades are recommended for ISO M materials to prevent work hardening and built-up edge.

Troubleshooting: If the cutting edge chips, ensure your machine setup is rigid. If crater wear is too fast, reduce cutting speed (Vc).

Equivalent Models: Sandvik SCMT 432-PR, Mitsubishi SCMT 432-RP, Kyocera SCMT 432-HR

 

Technical FAQ & Buying Guide

How do I choose the correct specification?

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.

How can I check compatibility with my existing setup?

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.

What quantity and price unit am I 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.

How should I choose cutting parameters?

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.

Are bulk discounts available?

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.

When will my order ship and arrive?

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.