MSU-Manufactured Carbide End Mills
MSU manufactures the four-flute IRR carbide corner rounding end mill family for machining a rounded profile on an external workpiece edge. The current range contains 31 exact catalog codes with radius labels from R0.5 to R8.
Compare the configurations by rounding radius, pilot or neck clearance, diameter, reach and workpiece material. Send the exact IRR code when known, or provide the edge drawing and complete tool-clearance requirement for review.
Send the edge profile, rounding radius, clearance dimensions, material and quantity for selection review or quotation.
Request a Corner Rounding ReviewThe IRR range consists of four-flute solid carbide corner rounding cutters for machining a radius on an external workpiece edge.
A corner rounding tool forms a radius on the edge of the workpiece. A Corner Radius End Mill has a radius at the tool’s own cutting corner and is a different tool geometry.
The catalog provides 31 exact IRR codes across R0.5–R8 labels. The radius label helps locate a configuration, but the part drawing still needs the rounding radius, adjacent faces, pilot or neck clearance, tool approach and available reach.
31 catalog configurations
A catalog code documents a configuration. Selection and availability are confirmed from the complete edge drawing and quotation.
Review the IRR range and the geometry fields that distinguish its 31 catalog configurations.
Compare IRR ConfigurationsThe IRR range contains one family. Compare the rounding radius and complete dimensions to select a configuration.
| Comparison input | What to provide | Review purpose |
|---|---|---|
| Rounding radius | Finished workpiece radius and tolerance | Matches the required edge profile to the applicable IRR radius entry |
| Pilot or neck | Pilot or neck diameter, length and required clearance | Checks access beside the workpiece edge and adjacent surfaces |
| Diameter | Tool and cutting-envelope diameter in the selected catalog entry | Checks the available tool envelope against the part and setup |
| Reach | Distance from reference face or holder to rounded edge | Checks access without selecting a configuration from radius alone |
| Material | Workpiece material, grade and hardness when known | Provides the material boundary for technical review |
Also confirm shank, overall length, workholding, tool approach, machine, holder, coolant method and quantity. MSU reviews the IRR code together with the complete drawing and setup before confirming the applicable configuration.
Continue to the edge drawing, access and setup details needed for a complete review.
Review Edge-Rounding InputsStart with the workpiece edge rather than the radius code alone. Provide the following information together:
Related routes
Use the End Mill Selection Guide for the shared selection framework. If the required radius, relief, pilot or neck condition, reach or edge access is outside the current IRR range, submit the drawing through Custom Cutting Tools for feasibility review.
Send the edge drawing, radius, clearance envelope and machining setup together for review.
Send Corner Rounding RequirementsThe current MSU range contains one IRR family and 31 exact catalog codes.
Family
IRR 4-Flute Inner Corner Rounding CutterFields to confirm
The published code set begins at IRR-R0.5 and continues through the catalog’s quarter-step radius labels to IRR-R8. The code range describes catalog entries; availability is confirmed during quotation.
For quotation, confirm the complete catalog entry and part drawing. The radius code must be reviewed together with the pilot or neck, tool diameter, reach, shank and clearance around adjacent faces.
The Downloads page provides the current MSU carbide end mill supplement containing the IRR table.
Open the document hub for the current IRR table and dimensional information.
View the Corner Rounding CatalogCorner Rounding End Mills are an MSU-manufactured product line. The current end-mill supplement establishes the IRR family, four-flute description, 31 exact codes and R0.5–R8 catalog labels in this range.
The MSU Factory has Walter HELITRONIC MICRO equipment. MSU’s Quality Control facilities include a ZOLLER G3 measurement system. For an order, the selected radius and other acceptance requirements are confirmed against the catalog configuration, quotation, order or approved drawing.
Product-specific geometry, runout, tolerance, surface-finish requirements and inspection items are confirmed for the selected configuration and order conditions.
Review the documented quality workflow and how order-specific radius requirements are confirmed.
Review Quality ControlSend the IRR code when known. Include the finished workpiece radius, tolerance, pilot or neck clearance, diameter, reach, shank, overall length, material and hardness, operation, approach, machine, holder, coolant, quantity, destination and target date.
MOQ is normally 5–10 pieces, with the final quantity confirmed by product and quotation.
Samples are charged according to the product, and sample freight is paid by the customer.
Completion of the whole order is guaranteed within 25–30 days from order placement.
T/T with deposit and balance is supported. Percentages and payment milestones are stated in the quotation or order.
EXW, FOB, CIF and DDP can be discussed and are confirmed by order, destination and feasibility. Quotations remain valid for 30 days.
Packaging is confirmed in the quotation or order.
Report an issue within 30 days after receipt and include applicable photos, batch number, measurement report or video. Each issue is reviewed case by case.
Inquiries are received by Maria at maria@msutools.com or +86 13973369578 by phone or WhatsApp.
Send the complete corner-rounding requirement through Contact MSU and use Downloads for the current catalog.
Review the shared ordering terms before sending the complete corner-rounding requirement.
Review Ordering and Delivery
It machines a rounded profile on an external workpiece edge. The part drawing should show the required radius, tolerance, adjacent faces and available approach.
A corner rounding end mill forms a radius on the workpiece edge. A corner radius end mill has a radius at the tool’s own cutting corner and is a different tool geometry.
The range includes the four-flute solid carbide IRR family. The current range contains 31 exact catalog codes with radius labels from R0.5 to R8.
No. The pilot or neck, tool diameter, reach, shank, adjacent-face clearance, workpiece material and machining setup must also be reviewed.
No. They are documented catalog configurations. Availability, quantity and commercial terms are confirmed in the quotation.
Yes. Submit the part drawing, radius, tolerance, access envelope, material, setup and quantity for feasibility review.
Completion of the whole order is guaranteed within 25–30 days from order placement.