The Durable Mills HRC60 corner radius end mill delivers exceptional precision in hardened steel up to HRC60. This 4 flute corner radius end mill features negative rake angles for enhanced chipping resistance. Upgrade your CNC production with our heavy-duty HRC60 corner radius end mills.
Manufactured by Durable Mills, this premium HRC60 corner radius end mill is developed specifically for high-efficiency profiling, contouring, and shoulder milling in medium-to-high hardness steels up to HRC 60. Engineered with micro-grain solid carbide, a reinforced negative rake cutting edge, and a wear-resistant protective coating, this 4 flute corner radius end mill ensures extended tool longevity and minimized corner chipping during demanding machining cycles.
| Workpiece Material | Axial Depth (ap) | Radial Width (ae) | Cutting Speed (Vc) | Feed per Tooth (fz) |
|---|---|---|---|---|
| Carbon Steel / Alloy Steel (<35 HRC) | ap ≤ 1.5D | ae ≤ 0.1D | 120 m/min | 0.006D mm/z |
| Alloy Steel (35–48 HRC) | ap ≤ 1.5D | ae ≤ 0.1D | 80 m/min | 0.0035D mm/z |
| Stainless Steels | ap ≤ 1.5D | ae ≤ 0.1D | 100 m/min | 0.006D mm/z |
| Gray Cast Iron / Ductile Cast Iron (<32 HRC) | ap ≤ 1.5D | ae ≤ 0.1D | 120 m/min | 0.0055D mm/z |
| Hardened Steel / Pre-hardened Steel (45–65 HRC) | ap ≤ 1.0D | ae ≤ 0.05D | 60–80 m/min | 0.003D mm/z |
| Model Type | Cutting Dia. (D mm) | Flute Length (Lc mm) | Shank Dia. (d mm) | Overall Length (L mm) | Corner Radius (R mm) | Flutes |
|---|---|---|---|---|---|---|
| DM-3*8*3*50*4T | 3 | 8 | 3 | 50 | 0.5 / 1.0 | 4 |
| DM-3*12*3*75L*4T | 3 | 12 | 3 | 75 | 0.5 / 1.0 | 4 |
| DM-3*15*3*100*4T | 3 | 15 | 3 | 100 | 0.5 / 1.0 | 4 |
| DM-1*3*4*50*4T | 1 | 3 | 4 | 50 | 0.2 | 4 |
| DM-1.5*4*4*50*4T | 1.5 | 4 | 4 | 50 | 0.2 | 4 |
| DM-2*5*4*50*4T | 2 | 5 | 4 | 50 | 0.2 / 0.5 | 4 |
| DM-3*8*4*50*4T | 3 | 8 | 4 | 50 | 0.2 / 0.5 / 1.0 | 4 |
| DM-4*10*4*50*4T | 4 | 10 | 4 | 50 | 0.2 / 0.5 / 1.0 | 4 |
| DM-4*16*4*75*4T | 4 | 16 | 4 | 75 | 0.5 / 1.0 | 4 |
| DM-4*20*4*100*4T | 4 | 20 | 4 | 100 | 0.5 / 1.0 | 4 |
| DM-5*13*5*50*4T | 5 | 13 | 5 | 50 | 0.5 / 1.0 | 4 |
| DM-5*20*5*75*4T | 5 | 20 | 5 | 75 | 0.5 / 1.0 | 4 |
| DM-5*25*5*100*4T | 5 | 25 | 5 | 100 | 0.5 / 1.0 | 4 |
| DM-6*15*6*50*4T | 6 | 15 | 6 | 50 | 0.2 / 0.5 / 1.0 | 4 |
| DM-5*13*6*50*4T | 5 | 13 | 6 | 50 | 0.5 / 1.0 | 4 |
| DM-6*25*6*75*4T | 6 | 25 | 6 | 75 | 0.5 / 1.0 | 4 |
| DM-6*30*6*100*4T | 6 | 30 | 6 | 100 | 0.5 / 1.0 | 4 |
| DM-6*40*6*150*4T | 6 | 40 | 6 | 150 | 0.5 / 1.0 | 4 |
| DM-8*20*8*60*4T | 8 | 20 | 8 | 60 | 0.2 / 0.5 / 1.0 / 2.0 / 3.0 | 4 |
| DM-8*28*8*75*4T | 8 | 28 | 8 | 75 | 0.5 / 1.0 / 2.0 / 3.0 | 4 |
| DM-8*35*8*100*4T | 8 | 35 | 8 | 100 | 0.5 / 1.0 / 2.0 / 3.0 | 4 |
| DM-8*50*8*150*4T | 8 | 50 | 8 | 150 | 0.5 / 1.0 / 2.0 / 3.0 | 4 |
| DM-10*25*10*75*4T | 10 | 25 | 10 | 75 | 0.2 / 0.5 / 1.0 / 1.5 / 2.0 / 3.0 | 4 |
| DM-10*40*10*100*4T | 10 | 40 | 10 | 100 | 0.5 / 1.0 / 2.0 / 3.0 | 4 |
| DM-10*50*10*150*4T | 10 | 50 | 10 | 150 | 0.5 / 1.0 / 2.0 / 3.0 | 4 |
| DM-12*30*12*75*4T | 12 | 30 | 12 | 75 | 0.2 / 0.5 / 1.0 / 1.5 / 2.0 / 3.0 | 4 |
| DM-12*45*12*100*4T | 12 | 45 | 12 | 100 | 0.5 / 1.0 / 2.0 / 3.0 | 4 |
| DM-12*60*12*150*4T | 12 | 60 | 12 | 150 | 0.5 / 1.0 / 2.0 / 3.0 | 4 |
Q: Why choose a corner radius end mill instead of a square end mill for HRC60 steel?
A: A square end mill concentrates maximum impact forces at its sharp corner tips, which frequently causes chipping when machining hardened steels. The corner radius (bull nose) design redistributes mechanical force smoothly across the curved edge, delivering superior tool strength and enabling faster machining feeds.
Q: What is the benefit of the negative rake angle design?
A: The negative rake angle creates a stronger wedge behind the cutting edge. This reinforced geometry provides extra resistance against cutting shock and abrasive wear when profiling tough materials such as pre-hardened tool steels, stainless alloys, and cast iron.
Q: Do you support custom shank lengths or specialized corner radii?
A: Yes. Alongside our comprehensive standard stock range, Durable Mills provides OEM and customized manufacturing for specific overall lengths (OAL), extended reach configurations, customized flute lengths, and tailored corner radii (R0.2 to R3.0).
Q: How can I request wholesale pricing or sample orders?
A: Please contact our global sales department directly via our contact page or email us at info@durablemills.com. Our technical engineers typically respond within 24 business hours.
