WNMG 080404/080408 R/L-S Carbide Turning Inserts for Steel – YBC251/YBC252
WNMG 080404 and 080408 R/L-S carbide turning inserts in YBC251 and YBC252 grades are designed for steel turning, facing and profiling. The double-sided trigon shape provides six usable cutting edges, while grade and chipbreaker combinations support different cutting loads from controlled finishing to general medium machining.
Qualità costante
Consistent geometry across repeat orders.
Ordini flessibili
Small batches and mixed sizes available.
OEM Support
Custom marking, labels and packaging.
Standard e personalizzati
Standard sizes and custom configurations.
◆Panoramica del prodotto
Il WNMG 080404/080408 R/L-S carbide turning inserts have an 80° trigon body for external turning and facing of steel. The 0.4 and 0.8 mm nose-radius options let you select a corner for the required feed, profile clearance and setup rigidity. Match the handed R/L-S cutting geometry to the actual toolholder and cutting direction.
The specified YBC251 and YBC252 grades are CVD-coated carbide grades for medium turning to roughing of steel and cast steel. YBC251 is positioned for lower cutting speeds; YBC252 covers a broader medium-to-roughing range. The grade choice still depends on steel grade, cut stability and the complete insert geometry.
Specify the full insert code, grade and holder before ordering. The R/L-S suffix is a geometry designation that needs a product-specific drawing; it does not, by itself, establish groove width, deep-grooving capability or interchangeability with another manufacturer’s chipbreaker.
Quick Procurement Summary
| Insert Family | WNMG 0804; 80° trigon | Substrate | Cemented carbide |
|---|---|---|---|
| Listed Sizes | 080404 / 080408 | Nose Radius | 0.4 / 0.8 mm |
| Grade Options | YBC251 / YBC252; CVD | Main Workpiece | Steel / cast steel; ISO P |
| Nominal Body | IC 12.70 mm; thickness 4.76 mm | Supply Check | R/L-S hand, grade, seat and stock |
The nominal dimensions describe the WNMG 0804 body. Verify the offered R/L-S geometry and the availability of each radius and grade combination.
Key Configuration Points
Application & Ordering Check
Application & Ordering CheckProvide the complete WNMG code, R/L-S variant, YBC grade, holder model, steel grade and hardness, cut continuity, coolant and required quantity. Confirm any replacement against a drawing or reference sample.
Use our CNC Insert Selection Guide o send the complete item list for a quotation.
◆WNMG Model Breakdown
Read a model such as WNMG 080408 R-S by separating the standardized body code from the supplier-specific R/L-S geometry and the YBC grade. Confirm the full order designation against the supplied product drawing.
| Codice | Designation | Meaning for This Series |
|---|---|---|
| W | Insert shape | 80° trigon, often described as an 80° three-cornered W shape. |
| N | Clearance angle | 0° nominal clearance; negative-style insert body. |
| M | Tolerance class | M tolerance designation; obtain the actual dimensional tolerances from the product drawing. |
| G | Hole / clamping form | Indicates the specified fixing-hole and chipbreaker configuration; verify exact geometry and holder fit. |
| 08 | Insert size code | WNMG 08 body size; nominal inscribed circle 12.70 mm. |
| 04 | Thickness code | Nominal body thickness 4.76 mm. |
| 04 / 08 | Nose-radius code | Nominal nose radius 0.4 / 0.8 mm respectively. |
| R/L-S + grade | Configuration and carbide grade | Confirm the offered handed geometry and S chipbreaker with YBC251 or YBC252 by complete code. |
◆Specifications & Size Chart
Manufacturer WNMG 0804 catalogues give a nominal inscribed circle (IC) of 12.70 mm, thickness (S) of 4.76 mm and fixing-hole diameter (D1) of 5.16 mm. These are standard body references, not an inspection drawing for the offered R/L-S chipbreaker.
| Model Reference | Handed Variant | IC* | S* | D1* | Nose Radius |
|---|---|---|---|---|---|
| WNMG 080404R-S | R-S | 12.70 mm | 4.76 mm | 5.16 mm | 0.4 mm |
| WNMG 080404L-S | L-S | 12.70 mm | 4.76 mm | 5.16 mm | 0.4 mm |
| WNMG 080408R-S | R-S | 12.70 mm | 4.76 mm | 5.16 mm | 0.8 mm |
| WNMG 080408L-S | L-S | 12.70 mm | 4.76 mm | 5.16 mm | 0.8 mm |
◆YBC Grade & Application
| Grado | Coating / Group | Manufacturer Positioning |
|---|---|---|
| YBC251 | CVD; P20–P35 | Medium turning to roughing of steel and cast steel at relatively lower cutting speeds. |
| YBC252 | CVD; P20–P35 | Broad-use medium turning to roughing of steel and cast steel, balancing wear resistance and toughness. |
Neither grade designation alone verifies suitability for stainless steel (ISO M), cast iron (ISO K), hardened steel or heat-resistant alloys. Ask for a separately qualified grade and chipbreaker for those workpiece groups.
◆How to Select & Set Up
Use cutting speed, feed and depth of cut published for the complete insert and grade combination. The old page's general values for steel and cast iron do not establish a validated range for this R/L-S configuration.
◆Related Guide & Ordering
Read our CNC Insert Selection Guide for shape, grade and chipbreaker checks. Send the full insert and holder codes for a product-specific R/L-S drawing, grade availability and cutting data.
◆Carbide Insert Customization & OEM
Specify the insert around the machining operation, workpiece and holder. We can review standard replacements, application-specific geometry and private-label requirements using your insert designation, drawing or sample. Available grades, coatings, dimensions and order quantities are confirmed for each requested series.
Geometry & Chip Control
Review chipbreaker, rake, cutting-edge preparation, nose radius and corner design for the operation and workpiece. Confirm holder compatibility before approving a modified geometry.
Substrate & Coating
Select an available carbide grade and coating for the workpiece material, cutting conditions and desired balance of wear resistance and edge toughness.
Dimensions & OEM
Review insert size, thickness, locating and clamping features, tolerances, laser marking and private-label packaging against the approved specification.
◆Opzioni di personalizzazione
Use the fields below when sending an inquiry. The exact options depend on the insert family and are confirmed in the quotation or approved drawing.
| Specifiche | Details to Confirm |
|---|---|
| Insert Type | Turning, milling, threading, grooving or drilling insert; send the designation or drawing. |
| Size & Fit | Shape, size, thickness, inscribed circle or edge length, hole or clamping form, and holder model. |
| Geometria di taglio | Chipbreaker, nose or corner radius, edge preparation, cutting direction and application-specific profile. |
| Grade & Coating | Workpiece group and grade, carbide substrate, coating system and wet or dry cutting conditions. |
| Tolerance & Inspection | Critical dimensions, profile requirements, inspection method and any required report. |
| OEM Presentation | Insert or box marking, label content, packaging format and quantity per pack. |
◆How to Request a Custom Insert
Send your insert requirements through our contact form or review our OEM and private-label service.
◆Carbide Insert Quality Control
Insert quality depends on the approved grade, geometry, coating and dimensional specification. We review the requirements at order confirmation and align the inspection scope with the insert series and any customer drawing. Share critical dimensions or documentation needs before production so they can be included in the agreed inspection plan.
01 · Incoming Material
Confirm the specified carbide grade or material documentation against the order requirements.
02 · In-Process Checks
Review dimensions and cutting-edge features during production against the approved specification.
03 · Final Inspection
Check the agreed dimensions, appearance, edge condition, coating identification and marking as applicable.
04 · Packing Review
Verify the item code, quantity, labels and protective packing against the approved order.
◆Inspection & Documentation
Inspection points and acceptance criteria should be agreed for the ordered series. For custom inserts, the approved drawing takes priority over a generic catalogue description.
| Check Area | What to Confirm |
|---|---|
| Dimensions & Fit | Insert size, thickness, corner radius, clamping features and any drawing tolerances. |
| Geometria di taglio | Chipbreaker, edge preparation, usable corners and profile where applicable. |
| Grade & Coating | Approved grade and coating designation; any requested verification method. |
| Appearance & Packing | Visible edge damage, marking, item code, count and packing format. |
| Requested Records | Inspection report, material or coating documentation, sample approval or batch identification when agreed. |
◆Order & Delivery
Share a line-by-line list of insert codes and quantities for a mixed-size quotation. Stock status, minimum quantity, sample requirements and production lead time are confirmed for each grade, coating and configuration.
Send your item list and quality requirements through our contact form for specification, availability and delivery confirmation.
◆Product FAQs
What is the difference between WNMG 080404 and WNMG 080408?
Both use the WNMG 0804 body with nominal 4.76 mm thickness. The final two digits specify the nose radius: 080404 is 0.4 mm and 080408 is 0.8 mm. Select the corner radius with the feed, surface finish, profile and setup rigidity.
What do the W, N, M and G letters mean?
W denotes the 80° trigon shape; N specifies 0° clearance; M is the tolerance class; and G identifies a hole and chipbreaker configuration. The 08 size has nominal 12.70 mm inscribed circle. Use the complete product drawing for precise tolerances and clamping details.
How do YBC251 and YBC252 differ?
Both are CVD-coated carbide grades positioned for medium turning to roughing of steel and cast steel. The grade maker positions YBC251 for relatively lower cutting speeds and YBC252 for a broader medium-to-roughing application range. Select between them using the actual steel grade, cutting conditions and wear behavior.
What does the R/L-S suffix specify?
R and L indicate handed versions of the offered cutting geometry; S is part of its supplier-specific chipbreaker designation. Check the active edge, holder orientation and feed direction on the exact drawing. A similar suffix from another manufacturer may refer to a different edge design.
Are these inserts designed for deep grooving?
The WNMG body is a turning-insert geometry for operations such as external turning and facing. The R/L-S suffix alone does not establish a groove width or deep-grooving capacity. For a dedicated groove, select an insert and holder with a specified groove-width and reach range.
Can I use YBC251 or YBC252 on stainless steel or cast iron?
The published primary range for these grades is steel and cast steel (ISO P). Stainless steel and cast iron belong to different material groups. Request a grade and chipbreaker qualified for the specific workpiece rather than assuming the same insert will perform equally across materials.
◆Ordering & OEM FAQs
Are all R/L-S size and YBC grade combinations available?
The four size-and-hand rows are selection references. Send the desired complete codes to confirm whether each configuration is supplied in YBC251, YBC252 or both, together with stock status, pack quantity and lead time.
Will these inserts fit my WNMG 08 toolholder?
Match the pocket size, fixing-hole and clamp design, entering angle and active R/L edge with your holder drawing. The WNMG 08 designation establishes the nominal body family, but the complete geometry and holder setup still need checking.
What information should I provide for a quotation or replacement?
Send the complete insert and holder codes, preferred YBC grade, photos or a drawing of the current insert, steel grade and hardness, operation, cutting conditions and required quantity. For a replacement, compare the chipbreaker and edge geometry as well as the body size.
Can I request private-label packaging or a modified configuration?
Provide the requested marking, box artwork, pack quantity, grade, geometry and target application. Availability, minimum order quantity and lead time are confirmed against the approved specification.
◆Guides & Technical References
Use the CNC Insert Selection Guide for insert-shape, grade, nose-radius and chipbreaker checks.
For the offered R/L-S drawing, YBC grade confirmation or a quotation, send the full insert and holder codes.
Need Sizes, Pricing or Custom Options?
Send us the required tool type, sizes, quantities, workpiece material and any OEM or custom requirements. We will confirm suitable specifications, availability, lead time and quotation details.
Drawings, size lists and reference photos are welcome.
