Product Description
The Dohre PEX Series corner radius end mill is a solid carbide milling tool designed for steel machining up to HRC55, including carbon steel, alloy steel, cast iron, ordinary mold steel, and general steel materials.
As a corner radius end mill, this tool is mainly used for side-wall finishing, shoulder milling, step machining, profile finishing, and applications where stronger corner protection is required. Compared with a sharp square end mill, the corner radius design helps distribute cutting stress more smoothly and reduce the risk of corner chipping during steel machining.
With ultra-fine carbide, AlTiN nano composite coating, a 6° positive rake angle, a 35° helix angle, and controlled corner radius geometry, the PEX corner radius end mill helps improve cutting stability, edge strength, and surface consistency in finishing and semi-finishing operations.
For flat surface, slotting, and sharp corner machining, a PEX square end mill is usually more suitable. For curved surface and 3D contour finishing, a PEX ball nose end mill is a better choice.
Product Features
Ultra-Fine Carbide for HRC55 Steel Machining
The PEX corner radius end mill is made from ultra-fine carbide with 10% cobalt content. This carbide substrate provides a balance of hardness, toughness, and wear resistance for carbon steel, alloy steel, cast iron, and general steel machining up to HRC55.
For shoulder milling and side-wall finishing, stable carbide quality helps reduce edge wear, improve dimensional consistency, and support longer tool life.
AlTiN Nano Composite Coating
The tool uses AlTiN nano composite coating to improve wear resistance and heat resistance during steel machining. This coating helps protect the cutting edge under higher cutting temperature and continuous machining conditions.
It is suitable for general steel machining, semi-dry machining, finishing, and semi-finishing operations where tool wear control is important.
Corner Radius Geometry for Stronger Edge Protection
The corner radius design helps strengthen the cutting corner compared with a sharp square end mill. It reduces stress concentration at the corner and helps lower the risk of edge chipping during side-wall machining, shoulder milling, and step finishing.
This geometry is especially useful for:
Compared with a square end mill, a corner radius end mill provides better corner protection. Compared with a ball nose end mill, it gives better side-wall and shoulder control.
6° Positive Rake Angle and 35° Helix Angle
The 6° positive rake angle helps reduce cutting resistance and supports smoother cutting in steel machining. The 35° helix angle helps improve chip evacuation, reduce vibration, and maintain stable cutting performance.
This design helps the tool perform well in finishing and semi-finishing applications where cutting stability, surface quality, and tool life are important.
Stable Performance for General Steel Machining
The combination of ultra-fine carbide, AlTiN nano coating, positive rake angle, 35° helix angle, and reinforced corner radius design helps the PEX corner radius end mill perform reliably in HRC55 and below materials.
Suitable materials include carbon steel, mild steel, alloy steel, cast iron, ordinary mold steel, and general steel parts.
Applications for Shoulder, Side-Wall and Profile Finishing
Dohre PEX corner radius end mills are suitable for general CNC machining, steel mold machining, shoulder milling, side-wall finishing, and semi-finishing applications up to HRC55.
| Machining Need | Why Choose PEX Corner Radius End Mill |
|---|
| Shoulder milling | Corner radius helps improve edge strength |
| Side-wall finishing | Supports stable vertical surface machining |
| Step machining | Helps maintain smoother step transitions |
| Profile finishing | Suitable for controlled contour and edge finishing |
| Semi-finishing | Reinforced corner design helps reduce chipping risk |
| General steel machining | Suitable for carbon steel, alloy steel, and ordinary steel |
| Batch machining | Stable carbide and coating help reduce tool changes |
Suitable workpiece materials include:
Typical applications include mold component machining, shoulder finishing, side-wall machining, step face machining, fixture machining, automotive parts machining, and general CNC job shop production.
Manufacturing & Quality Control
Dohre focuses on stable carbide tool manufacturing, precision grinding, corner radius consistency, and cutting edge quality. For corner radius end mills, radius accuracy and edge strength directly affect shoulder quality, side-wall finish, and tool life.
German Walter 5-Axis Grinding Machines
PEX corner radius end mills are produced using German Walter 5-axis high-precision grinding machines. This helps maintain stable flute geometry, accurate corner radius, and consistent cutting edge quality.
Corner Radius Grinding Control
The corner radius is precisely ground and inspected to support stable profile consistency, edge protection, and repeatable machining performance.
Surface Optimization
Fluid abrasive drag finishing helps reduce burrs and improve smoothness on the cutting edge and flute area. This supports smoother cutting and more stable chip evacuation.
Walter HELICHECK PLUS Inspection
Tool profile, diameter, runout, corner radius, and key geometry are inspected with Walter HELICHECK PLUS measuring equipment to support consistent batch quality.
High-Magnification Inspection
Each tool can be inspected under high magnification to check cutting edge appearance, chipping, serration, and visible edge defects before shipment.
FAQ & Contact Us
Q1: What is the PEX corner radius end mill used for?
The PEX corner radius end mill is mainly used for shoulder milling, side-wall finishing, step machining, profile finishing, and general steel machining up to HRC55.
Q2: What materials can this corner radius end mill machine?
It is suitable for carbon steel, alloy steel, cast iron, ordinary mold steel, tool steel up to HRC55, and general steel components.
Q3: What is the difference between a corner radius end mill and a square end mill?
A square end mill provides a sharp corner for flat-bottom and step machining. A corner radius end mill has a rounded corner that improves edge strength and helps reduce corner chipping.
Q4: What is the difference between a corner radius end mill and a ball nose end mill?
A corner radius end mill is better for shoulder milling, side-wall finishing, and edge protection. A ball nose end mill is better for curved surfaces, 3D contours, and mold profile finishing.
Q5: Can this tool machine stainless steel?
It can be used in some general stainless steel conditions, but for dedicated stainless steel machining, a TEX stainless steel end mill is usually more suitable.
Q6: Can this tool machine hardened steel above HRC60?
This PEX corner radius end mill is mainly recommended for materials up to HRC55. For HRC60+ hardened steel, HEX or CBN tools are more suitable.
Q7: Is this corner radius end mill suitable for roughing?
It is mainly recommended for finishing, semi-finishing, and light roughing under stable machining conditions. For heavy roughing, a dedicated roughing end mill is usually more suitable.
Q8: Can Dohre customize PEX corner radius end mills?
Yes. Dohre supports custom carbide corner radius end mills, including diameter, flute length, overall length, shank size, corner radius, coating, and application-specific geometry.
Q9: Are you a carbide corner radius end mill manufacturer?
Yes. Dohre manufactures solid carbide end mills for carbon steel, stainless steel, aluminum, mold steel, hardened steel, titanium alloy, and custom machining applications.
