Bull Nose End Mills Manufacturer & Supplier
ONMY supplies solid carbide bull nose end mills, also called corner radius end mills, for roughing, semi-finishing, side milling, pocket milling, mold machining and CNC metalworking applications.
Choose from catalogue-supported HMQ-R series 2 flute, 3 flute, 4 flute, long shank, extra-long shank and custom carbide bull nose end mills with different corner radius options for steel, stainless steel, hardened steel, aluminum and other machining materials.
Request a Quote View Product SeriesGet a Bull Nose End Mill Recommendation
- ✓ Solid carbide bull nose end mills for CNC milling
- ✓ Corner radius design for stronger cutting edge
- ✓ Catalogue-supported HMQ-2R, HMQ-3R and HMQ-4R series
- ✓ Standard, long shank and extra-long shank options
- ✓ Suitable for roughing, semi-finishing and mold machining
- ✓ Custom radius, flute length, coating and packaging available
Carbide Bull Nose End Mills with Corner Radius
A bull nose end mill is a carbide end mill with a small corner radius on the cutting edge. It is also commonly called a corner radius end mill or bullnose end mill. The rounded corner helps strengthen the cutting edge and reduce chipping during CNC milling.
Compared with square end mills, bull nose end mills offer better edge strength and longer tool life in many roughing and semi-finishing applications. Compared with ball nose end mills, they are better suited for flat areas, side milling, pocket milling and strong-edge machining.
- Stronger cutting edge than square end mills
- Useful for roughing, semi-finishing and side milling
- Suitable for mold steel, stainless steel and hardened steel machining
- Available in catalogue-supported 2 flute, 3 flute, 4 flute, long shank, extra-long shank and custom radius options
- Helps reduce corner chipping and improve tool life
Choose Bull Nose End Mills by Flute Count and Length
Different flute counts, radius sizes and length designs are used for different materials, cutting depths, machine rigidity and surface finish requirements.
2 Flute Bull Nose End Mills
2 flute bull nose end mills provide more chip space and can be used for aluminum, copper, non-ferrous materials and applications where chip evacuation is important.
View 2 Flute End Mills →3 Flute Bull Nose End Mills
3 flute bull nose end mills provide a balance between chip evacuation, feed capability and surface finish for general CNC milling and non-ferrous machining.
View 3 Flute End Mills →4 Flute Bull Nose End Mills
4 flute bull nose end mills offer better rigidity and cutting stability for steel, stainless steel, hardened steel, mold steel and semi-finishing operations.
View 4 Flute End Mills →Corner Radius Bull Nose End Mills
Different bull nose end mill radius options can be selected according to edge strength, cutting load, surface finish and corner geometry requirements.
View Radius Guide →Long Shank Bull Nose End Mills
Long shank and extra-long shank bull nose end mills are suitable for deeper cavities, mold machining and hard-to-reach areas.
View Long Reach End Mills →Custom Bull Nose End Mills
Custom bull nose end mills can be made according to your diameter, flute length, overall length, corner radius, coating, material and machining application.
View Custom End Mills →HMQ-R Bull Nose End Mill Series and Shank Options
To make this page closer to a real B2B product page, the following section organizes catalogue-supported bull nose / corner radius end mill structures by flute count and tool reach.
| Catalogue Series Example | Product Type | Typical Application | Inquiry Notes |
|---|---|---|---|
| HMQ-2R | 2 Flute Bull Nose / Corner Radius End Mill | Slot milling, side milling, aluminum machining and applications requiring chip evacuation plus stronger corner edge. | Send diameter, corner radius, flute length, overall length and coating requirement. |
| HMQ-2RH | 2 Flute Long Shank Bull Nose End Mill | Extended reach machining where chip evacuation and corner strength are both important. | Useful when reach is longer than a standard tool but cutting depth is not extremely deep. |
| HMQ-2RG | 2 Flute Extra Long Shank Bull Nose End Mill | Deep cavity reach, hard-to-access features and non-ferrous material machining with extended overhang. | Provide overhang, cutting depth and material so tool rigidity can be reviewed. |
| HMQ-3R | 3 Flute Bull Nose / Corner Radius End Mill | Balanced chip evacuation, feed capability and edge strength for general CNC milling. | Suitable when 2 flute chip space and 4 flute rigidity need to be balanced. |
| HMQ-3RH | 3 Flute Long Shank Bull Nose End Mill | General side milling, deeper profiles and applications requiring additional reach. | Recommended for moderate reach applications with balanced cutting performance. |
| HMQ-3RG | 3 Flute Extra Long Shank Bull Nose End Mill | Extra reach machining in cavities, molds and workpieces with tool access limitations. | Check machine rigidity, tool overhang and workpiece material before heavy cutting. |
| HMQ-4R | 4 Flute Bull Nose / Corner Radius End Mill | Steel, stainless steel, hardened steel, side milling, semi-finishing and stable cutting. | Better rigidity and surface finish than lower flute count options. |
| HMQ-4RH | 4 Flute Long Shank Bull Nose End Mill | Extended reach side milling, mold machining and deeper cavity machining. | Provide shank reach, corner radius and required flute length when requesting a quote. |
| HMQ-4RG | 4 Flute Extra Long Shank Bull Nose End Mill | Extra-long reach applications in mold and die machining or deep workpiece structures. | Send drawing, overhang, cutting depth and material hardness for recommendation. |
The listed series examples are used to guide product selection. Final availability, coating, radius range and dimensions should be confirmed according to your RFQ or catalogue version.
What Are Bull Nose End Mills Used For?
Bull nose end mills are commonly used when the tool needs stronger corner strength than a square end mill while still machining flat or semi-flat features.
Rough Milling
The corner radius helps improve cutting edge strength during roughing and heavy material removal.
Semi-Finishing
Bull nose end mills are suitable for semi-finishing surfaces where both strength and surface quality matter.
Side Milling
Used for side wall machining, profile milling and stable cutting along vertical surfaces.
Pocket Milling
Suitable for pocket milling where a stronger cutting corner is needed to reduce tool chipping.
Mold Machining
Commonly used in mold and die machining, especially for hardened steel and pre-hardened materials.
Hardened Material Machining
The radius edge improves durability when milling hardened steel, stainless steel and mold steel.
Bull Nose End Mill Radius Guide
Bull nose end mill radius selection affects cutting edge strength, chip load, surface finish and part corner geometry.
| Radius Direction | Typical Use | Selection Notes |
|---|---|---|
| Small Corner Radius | Semi-finishing, narrow features, smaller internal corner requirement | Better when the part geometry requires a smaller corner radius. |
| Medium Corner Radius | General roughing, side milling, pocket milling and mold machining | Balances edge strength, cutting stability and machining flexibility. |
| Larger Corner Radius | Heavy cutting, stronger edge requirement and longer tool life | Improves edge strength but requires checking part corner clearance. |
| Custom Radius | Non-standard drawings, special parts, OEM tooling requirements | Radius can be customized according to drawing, sample or machining application. |
If you need a specific bull nose end mill radius such as a non-standard R value, please send your drawing or tool specification for review.
Bull Nose End Mills for Different Workpiece Materials
The best bull nose end mill depends on the workpiece material, material hardness, cutting depth, machine rigidity, coating and radius requirement.
| Workpiece Material | Recommended Bull Nose End Mill | Typical Design Direction | Related Page |
|---|---|---|---|
| Aluminum / Copper / Non-Ferrous Materials | 2 flute or 3 flute bull nose end mills | Sharp cutting edge, chip space, polished flute and anti-sticking coating if needed | End Mills for Aluminum |
| Carbon Steel / Alloy Steel | 3 flute or 4 flute bull nose end mills | Balanced rigidity, radius edge and wear-resistant coating | Carbide End Mills |
| Stainless Steel | 4 flute bull nose end mills or stainless-specific geometry | Strong edge, heat-resistant coating and stable chip control | End Mills for Stainless Steel |
| Hardened Steel / Mold Steel | Rigid bull nose end mills with suitable radius and coating | Wear-resistant carbide grade, strong edge and hard-milling coating | End Mills for Hardened Steel |
For difficult materials, send your hardness, cutting depth, radius requirement and tool size so we can recommend a suitable carbide bull nose end mill.
Bull Nose End Mill Specifications from Catalogue Logic
ONMY bull nose end mills can be selected by corner radius, flute count, shank length, coating direction and workpiece material.
| Specification Item | Available Direction | How It Helps Selection |
|---|---|---|
| Tool Shape | Bull nose / corner radius / round corner end mill | Provides a stronger cutting edge than a sharp square corner while keeping a flat-end geometry. |
| Flute Count | 2 flute, 3 flute, 4 flute and custom flute count | 2 flute favors chip evacuation; 4 flute favors rigidity and finishing performance. |
| Corner Radius | Standard R values and custom radius according to drawing | Choose according to part corner requirement, edge strength and tool life target. |
| Shank / Reach Structure | Standard shank, long shank and extra-long shank | Choose according to reach, cavity depth, overhang and machining stability. |
| Diameter Range | Standard metric sizes, inch sizes and custom diameters | Supports common CNC milling sizes and non-standard OEM tooling requirements. |
| Coating | Coating selected according to aluminum, steel, stainless steel or hardened steel | Improves wear resistance, heat resistance and tool life in suitable materials. |
| Custom Options | Diameter, radius, flute length, overall length, shank, coating, marking and packaging | Useful for OEM, distributor, drawing-based and non-standard tooling requirements. |
For exact dimensions, please send your required diameter, corner radius, flute length, overall length, shank diameter, material hardness and quantity. Our team can check the closest standard item or custom option.
Carbide Bull Nose End Mill Specifications and Options
ONMY can supply standard and custom carbide bull nose end mills in different diameters, corner radius sizes, flute counts, cutting lengths, shank sizes and coatings.
- Tool shape: bull nose / corner radius / round corner end mill
- Flute count: 2 flute, 3 flute, 4 flute and custom flute count
- Catalogue examples: HMQ-2R, HMQ-2RH, HMQ-2RG, HMQ-3R, HMQ-3RH, HMQ-3RG, HMQ-4R, HMQ-4RH and HMQ-4RG
- Radius options: standard radius and custom R value
- Length options: standard shank, long shank and extra-long shank
- Diameter options: metric sizes, inch sizes and custom sizes
- Coating options: selected according to aluminum, steel, stainless steel or hardened steel
Bull Nose End Mill vs Square End Mill vs Ball Nose End Mill
Bull nose end mills are often compared with square end mills and ball nose end mills. The right choice depends on the machining result you need.
| Tool Type | Main Feature | Best Used For | Related Page |
|---|---|---|---|
| Square End Mill | Flat cutting end and sharper corner | Slots, pockets, flat-bottom milling and square shoulders | Square End Mills |
| Bull Nose / Corner Radius End Mill | Flat end with rounded cutting corner | Stronger edge, roughing, semi-finishing, side milling and mold machining | Current Page |
| Ball Nose End Mill | Fully rounded cutting tip | 3D contouring, curved surface machining, mold finishing and profile milling | Ball Nose End Mills |
| Corner Rounding Cutter | Form cutter for rounding workpiece edges | Edge rounding of parts, not the same as a bull nose end mill | Special End Mills |
Important: a bull nose end mill is also called a corner radius end mill, but it is not the same as a corner rounding cutter.
Need Custom Bull Nose End Mills?
If standard bull nose end mills cannot meet your machining requirement, ONMY can support custom carbide bull nose end mills according to drawing, sample or application details. Custom options include diameter, flute length, overall length, shank diameter, flute count, corner radius, coating, carbide grade, marking and packaging.
More Carbide End Mill Selection Resources
Compare bull nose end mills with other carbide end mills, coatings and material-specific tool options.
Carbide End Mills
View the main carbide end mill category page and compare square, ball nose, bull nose, roughing and custom end mills.
View Carbide End Mills →End Mill Coatings Guide
Compare coating options for aluminum, stainless steel, hardened steel, titanium alloys and other materials.
View Coating Guide →Custom End Mills
Send drawing or application details for custom diameter, radius, flute length, coating and carbide grade.
View Custom End Mills →Need Bull Nose End Mills for Your Machining Application?
Send us your bull nose end mill requirement and our team will help recommend a suitable tool solution. Please provide material, hardness, tool diameter, corner radius, flute length, overall length, shank diameter, coating requirement and quantity if available.
- HMQ-2R, HMQ-3R and HMQ-4R bull nose end mills
- HMQ-2RH / 3RH / 4RH long shank bull nose end mills
- HMQ-2RG / 3RG / 4RG extra-long shank bull nose end mills
- Standard and custom bull nose end mill radius options
- Bull nose end mills for steel, stainless steel, hardened steel and aluminum
- Custom carbide bull nose end mills according to drawing
Send Your Requirement
Bull Nose End Mills FAQ
What is a bull nose end mill?
A bull nose end mill is a carbide end mill with a corner radius on the cutting edge. It is also called a corner radius end mill or bullnose end mill.
What is a bull nose end mill used for?
Bull nose end mills are used for roughing, semi-finishing, side milling, pocket milling, mold machining and hardened material machining where stronger edge strength is needed.
Is a bull nose end mill the same as a corner radius end mill?
Yes. In most CNC milling applications, bull nose end mill and corner radius end mill refer to the same type of tool: a flat-end tool with a rounded cutting corner.
What is the difference between a bull nose end mill and a ball nose end mill?
A bull nose end mill has a flat end with a rounded corner, while a ball nose end mill has a fully rounded cutting tip. Bull nose tools are better for stronger edge milling, while ball nose tools are better for 3D contouring and curved surfaces.
How do I choose bull nose end mill radius?
A smaller radius is better when the part requires a smaller corner. A larger radius improves edge strength and tool life, but the part geometry and clearance must be checked.
Which bull nose end mill is best for stainless steel?
For stainless steel machining, a rigid 4 flute bull nose end mill with suitable heat-resistant coating and strong cutting edge is commonly recommended.
Which bull nose end mill series do you supply?
ONMY supplies catalogue-supported bull nose / corner radius end mill structures such as 2 flute, 3 flute, 4 flute, long shank and extra-long shank bull nose end mills. Series examples include HMQ-2R, HMQ-2RH, HMQ-2RG, HMQ-3R, HMQ-3RH, HMQ-3RG, HMQ-4R, HMQ-4RH and HMQ-4RG.
Do you provide custom bull nose end mills?
Yes. ONMY supports custom bull nose end mills according to drawing, sample or machining application. Custom options include diameter, flute length, overall length, shank diameter, flute count, corner radius, coating, carbide grade, marking and packaging.
Can I request a bull nose end mill recommendation?
Yes. Please send your workpiece material, hardness, machining operation, tool size, corner radius requirement, coating preference, quantity and drawing if available. Our team will review your requirement and recommend a suitable bull nose end mill.
