Square End Mills Manufacturer & Supplier
ONMY supplies solid carbide square end mills for CNC slotting, side milling, shoulder milling, pocket milling, flat-bottom milling and general metalworking applications.
Choose from catalogue-supported 2 flute, 3 flute, 4 flute, long edge, extra-long edge, long shank and custom carbide square end mills for aluminum, steel, stainless steel, hardened steel and other machining materials.
Request a Quote View Product SeriesGet a Square End Mill Recommendation
- ✓ Catalogue-supported HMQ square end mill series
- ✓ 2 flute, 3 flute and 4 flute square end mills
- ✓ Standard, long edge, extra-long edge and long shank designs
- ✓ Suitable for slotting, side milling and flat-bottom machining
- ✓ Custom diameter, flute length, coating and packaging available
Solid Carbide Square End Mills for Flat-Bottom Milling
Square end mills, also called flat end mills, are designed with a flat cutting end for producing square shoulders, flat-bottom pockets, slots and side walls. They are one of the most commonly used carbide end mills in CNC machining.
Compared with ball nose end mills or corner radius end mills, square end mills are better suited for machining flat surfaces, slots, shoulders and profiles where a sharp or flat bottom feature is required.
- Flat-bottom slot milling and pocket milling
- Side milling, shoulder milling and profile milling
- 2 flute, 3 flute and 4 flute square end mill options
- Long edge, extra-long edge, long shank and extra-long shank structures
- Custom square end mills for non-standard sizes and special applications
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Choose Square End Mills by Flute Count and Length
Different flute counts and cutting lengths are used for different materials, chip evacuation needs, cutting depths and surface finish requirements.
2 Flute Square End Mills
2 flute square end mills provide larger chip space and are commonly used for aluminum, copper, plastics, acrylic and slot milling applications.
View 2 Flute End Mills →3 Flute Square End Mills
3 flute square end mills provide a balance between chip evacuation and surface finish, especially for aluminum and non-ferrous material machining.
View 3 Flute End Mills →4 Flute Square End Mills
4 flute square end mills provide better rigidity and finishing performance for steel, stainless steel, hardened steel and general side milling.
View 4 Flute End Mills →Micro Square End Mills
Micro square end mills are used for precision milling, small slots, fine features and small-diameter machining such as 1mm, 2mm and 3mm tool requirements.
View End Mill Sizes →Long Edge Square End Mills
Long edge and extra-long edge square end mills are suitable for deeper side milling, deep slots and applications that require extended cutting length.
View Long Reach End Mills →Custom Square End Mills
Custom square end mills can be made according to your diameter, flute length, overall length, shank, coating, material and machining application.
View Custom End Mills →HMQ Square End Mill Series and Length Options
To make this page closer to a real B2B product page, the following section organizes catalogue-supported square end mill structures by flute count and tool length.
| Catalogue Series Example | Product Type | Typical Application | Inquiry Notes |
|---|---|---|---|
| HMQ-2E | 2 Flute Square End Mill | Slot milling, side milling, general milling and applications requiring good chip evacuation. | Send diameter, flute length, overall length and coating requirement. |
| HMQ-2EL | 2 Flute Long Edge Square End Mill | Longer cutting length for deeper slotting and side milling applications. | Useful when cutting depth is greater than standard flute length. |
| HMQ-3E | 3 Flute Square End Mill | Balanced chip evacuation and cutting stability for aluminum and general CNC milling. | Suitable when 2 flute chip space and 4 flute rigidity need to be balanced. |
| HMQ-3EL | 3 Flute Long Edge Square End Mill | Longer cutting edge for deeper milling while maintaining balanced flute design. | Recommended for deeper profiles and longer side walls. |
| HMQ-4E | 4 Flute Square End Mill | Side milling, shallow slotting, finishing and stable cutting in steel or general materials. | Better rigidity and surface finish than lower flute count options. |
| HMQ-4EL | 4 Flute Long Edge Square End Mill | Longer flute design for deeper side milling and extended cutting length. | Provide cutting depth and required flute length when requesting a quote. |
| HMQ-4EX | 4 Flute Extra Long Edge Square End Mill | Deep side wall machining and applications requiring extra-long cutting edge. | Check tool rigidity and machine condition before heavy cutting. |
| HMQ-4EH | 4 Flute Long Shank Square End Mill | Extended reach applications, deeper cavities and difficult-to-access machining areas. | Suitable when reach is more important than cutting edge length. |
| HMQ-4EG | 4 Flute Extra Long Shank Square End Mill | Extra reach for deep cavity machining and hard-to-reach part structures. | Send overhang, cutting depth and workpiece material for review. |
The listed series examples are used to guide product selection. Final availability, coating, diameter range and dimensions should be confirmed according to your RFQ or catalogue version.
What Are Square End Mills Used For?
Square end mills are mainly used when the machined part requires flat bottoms, straight walls, square shoulders or sharp internal features.
Slot Milling
Square end mills are widely used for machining slots and grooves where a flat bottom and controlled slot width are required.
Side Milling
Suitable for machining side walls, profiles and vertical surfaces in CNC milling operations.
Фрезерование плеча
Used for producing square shoulders and step features where a flat end geometry is needed.
Pocket Milling
Square end mills are suitable for flat-bottom pocket machining and general cavity milling.
Flat-Bottom Milling
Designed for flat bottom surfaces where ball nose tools are not suitable.
Precision End Milling
Micro and small-diameter square end mills can be used for fine features and precision parts.
Square End Mills for Different Workpiece Materials
The best square end mill depends on your workpiece material, cutting depth, machine rigidity, chip evacuation and surface finish requirement.
| Материал заготовки | Recommended Square End Mill | Typical Design Direction | Related Page |
|---|---|---|---|
| Aluminum / Copper / Acrylic | 2 flute or 3 flute square end mills | Sharp edge, large chip space, polished flute, good chip evacuation | End Mills for Aluminum |
| Carbon Steel / Alloy Steel | 3 flute or 4 flute square end mills | Balanced rigidity, wear-resistant coating and stable cutting geometry | Твердосплавные концевые фрезы |
| Нержавеющая сталь | 4 flute square end mills or application-specific geometry | Strong cutting edge, heat-resistant coating and stable chip control | End Mills for Stainless Steel |
| Hardened Steel / Mold Steel | Short flute or rigid square end mills | Wear-resistant carbide grade, strong edge and suitable coating | End Mills for Hardened Steel |
If you are not sure which square end mill is suitable, send your material, hardness, cutting depth and tool size requirement for recommendation.
Square End Mill Specifications from Catalogue Logic
ONMY square end mills can be selected by flute count, end shape, cutting length, shank structure, coating and workpiece material.
| Specification Item | Available Direction | How It Helps Selection |
|---|---|---|
| Tool Shape | Square end / flat end / sharp corner protection design | Used for flat-bottom slots, pockets, shoulders and side walls. |
| Flute Count | 2 flute, 3 flute, 4 flute and custom flute count | 2 flute favors chip evacuation; 4 flute favors rigidity and finish. |
| Length Structure | Standard length, long edge, extra-long edge, long shank and extra-long shank | Choose according to cutting depth, reach and side wall depth. |
| Диапазон диаметров | Standard metric sizes, small diameter tools and custom diameters | Supports common CNC milling sizes and small feature machining. |
| Покрытие | Coating selected according to aluminum, steel, stainless steel or hardened steel | Improves wear resistance, heat resistance and tool life in suitable materials. |
| Application Series | Economical, universal, high-performance and material-specific end mill families | Helps match tool grade and geometry to machining cost and performance needs. |
| Custom Options | Diameter, 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, flute length, overall length, shank diameter, material and quantity. Our team can check the closest standard item or custom option.
Square End Mill Specifications and Options
ONMY can supply standard and custom carbide square end mills in different diameters, flute counts, cutting lengths, shank sizes and coating options.
- Tool shape: square end / flat end
- Flute count: 2 flute, 3 flute, 4 flute and custom flute count
- Catalogue examples: HMQ-2E, HMQ-2EL, HMQ-3E, HMQ-3EL, HMQ-4E, HMQ-4EL, HMQ-4EX, HMQ-4EH and HMQ-4EG
- Length options: standard length, long edge, extra-long edge, long shank and extra-long shank
- Diameter options: standard metric sizes, inch sizes and custom sizes
- Варианты покрытия: selected according to steel, stainless steel, aluminum or hardened steel
- Custom options: diameter, flute length, overall length, shank, coating, marking and packaging
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How to Choose Square End Mills
Use this table as a practical starting point for selecting a square end mill.
| Machining Requirement | Recommended Option | Причина |
|---|---|---|
| Aluminum slotting | 2 flute or 3 flute square end mill | Better chip evacuation and reduced chip clogging. |
| Steel side milling | 3 flute or 4 flute square end mill | Better cutting stability and tool rigidity. |
| Stainless steel machining | 4 flute square end mill with heat-resistant coating | Improves edge strength and heat resistance. |
| Small precision features | Micro square end mill or small-diameter custom tool | Suitable for 1mm, 2mm, 3mm and other small-diameter machining. |
| Deep side wall milling | Long edge or extra-long edge square end mill | Provides extended cutting length for deeper side wall cutting. |
| Deep cavity reach | Long shank or extra-long shank square end mill | Provides more reach when the part structure limits tool access. |
| Non-standard size or special application | Custom square end mill | Tool geometry can be designed according to drawing or application. |
Square End Mill vs Ball Nose vs Corner Radius End Mill
Different carbide end mill shapes are designed for different machining results.
| Тип инструмента | Main Feature | Best Used For | Related Page |
|---|---|---|---|
| Квадратная концевая фреза | Flat cutting end | Slots, pockets, shoulders, flat-bottom milling and side milling | Current Page |
| Концевая фреза с шаровым наконечником | Rounded cutting tip | 3D contouring, mold machining, curved surfaces and finishing | Концевые фрезы с шаровым наконечником |
| Corner Radius / Bull Nose End Mill | Rounded cutting corner | Stronger edge, reduced chipping, semi-finishing and hardened material machining | Торцевые фрезы с бычьим носом |
For flat-bottom milling and square shoulders, choose square end mills. For curved surfaces, choose ball nose end mills. For stronger edge performance, choose corner radius end mills.
Need Custom Square End Mills?
If standard square end mills cannot meet your machining requirement, ONMY can support custom carbide square end mills according to drawing, sample or application details. Custom options include diameter, flute length, overall length, shank diameter, flute count, coating, carbide grade, marking and packaging.
More Carbide End Mill Selection Resources
Continue comparing tool types, sizes and coatings to choose the right carbide end mill.
Твердосплавные концевые фрезы
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 Sizes Chart
Check common metric and inch end mill sizes, including small diameter tools and custom size options.
View Size Chart →End Mill Coatings Guide
Compare coating options for aluminum, stainless steel, hardened steel, titanium alloys and other materials.
View Coating Guide →Need Square End Mills for Your Machining Application?
Send us your square end mill requirement and our team will help recommend a suitable tool solution. Please provide material, hardness, tool diameter, flute length, overall length, shank diameter, coating requirement and quantity if available.
- HMQ-2E, HMQ-3E and HMQ-4E square end mills
- Long edge, extra-long edge, long shank and extra-long shank square end mills
- Micro square end mills for precision milling
- Square end mills for aluminum, steel, stainless steel and hardened steel
- Custom square end mills according to drawing
Send Your Requirement
Square End Mills FAQ
What is a square end mill?
A square end mill is a carbide end mill with a flat cutting end. It is used for slotting, side milling, shoulder milling, pocket milling and flat-bottom machining.
What is the difference between a square end mill and a flat end mill?
In most CNC milling applications, square end mill and flat end mill refer to the same type of tool. Both are designed to machine flat bottoms, slots and square shoulders.
Which square end mill series do you supply?
ONMY supplies catalogue-supported square end mill structures such as 2 flute, 3 flute, 4 flute, long edge, extra-long edge, long shank and extra-long shank square end mills. Series examples include HMQ-2E, HMQ-2EL, HMQ-3E, HMQ-3EL, HMQ-4E, HMQ-4EL, HMQ-4EX, HMQ-4EH and HMQ-4EG.
Which square end mill is best for aluminum?
For aluminum machining, 2 flute or 3 flute square end mills are commonly recommended because they provide better chip evacuation and reduce chip clogging.
Which square end mill is best for steel?
For steel machining, 3 flute or 4 flute carbide square end mills are often selected for better rigidity, surface finish and cutting stability.
Can a square end mill cut a square hole?
A square end mill can machine square pockets, slots and flat-bottom features, but it cannot create a perfectly sharp internal square corner because the tool is round. Additional operations may be needed for a true sharp internal corner.
Do you provide micro square end mills?
Yes. Small diameter and micro square end mills can be supplied or customized for precision milling, small slots and fine features such as 1mm, 2mm or 3mm tool requirements.
Do you provide custom square end mills?
Yes. ONMY supports custom square end mills according to drawing, sample or machining application. Custom options include diameter, flute length, overall length, shank diameter, flute count, coating, carbide grade, marking and packaging.
Can I request a square end mill recommendation?
Yes. Please send your workpiece material, hardness, machining operation, tool size, coating preference, quantity and drawing if available. Our team will review your requirement and recommend a suitable square end mill.
