• 4-flute flat end mill features ultra-fine grain carbide substrate and high-hardness nano coating, reaching HRC65 hardness. It delivers outstanding rigidity, wear resistance and stability, ideal for high-speed milling of hardened steel, mold steel and alloy steel. With excellent chip evacuation and smooth cutting, it ensures high precision and long tool life for side milling, slotting and profiling in CNC machining.
| Series | Code | Parameter | Dc(h7) | Cange/Fillet | LC | L1 | SD(h5) | Teeth number |
| HPX | HPEX4-03 | 3*8*C0.04*50*4 | 3 | C0.04 | 8 | 50 | 4 | 4 |
| HPX | HPEX4L-03 | 3*12*C0.04*75*4 | 3 | C0.04 | 12 | 75 | 4 | 4 |
| HPX | HPEX4-03P | 3*8*C0.04*50*6 | 3 | C0.04 | 8 | 50 | 6 | 4 |
| HPX | HPEX4L-03P | 3*12*C0.04*75*6 | 3 | C0.04 | 12 | 75 | 6 | 4 |
| HPX | HPEX4-04 | 4*12*C0.06*50*4 | 4 | C0.06 | 12 | 50 | 4 | 4 |
| HPX | HPEX4L-04 | 4*15*C0.06*75*4 | 4 | C0.06 | 15 | 75 | 4 | 4 |
| HPX | HPEX4-04P | 4*12*C0.06*50*6 | 4 | C0.06 | 12 | 50 | 6 | 4 |
| HPX | HPEX4L-04P | 4*15*C0.06*75*6 | 4 | C0.06 | 15 | 75 | 6 | 4 |
| HPX | HPEX4-05 | 5*13*C0.06*50*5 | 5 | C0.06 | 13 | 50 | 6 | 4 |
| HPX | HPEX4L-05 | 5*20*C0.06*75*6 | 5 | C0.06 | 20 | 75 | 6 | 4 |
| HPX | HPEX4-05L | 5*15*C0.06*50*5 | 5 | C0.06 | 15 | 50 | 6 | 4 |
| HPX | HPEX4-06 | 6*16*C0.08*50*6 | 6 | C0.08 | 16 | 50 | 6 | 4 |
| HPX | HPEX4-06L | 6*18*C0.08*50*6 | 6 | C0.08 | 18 | 50 | 6 | 4 |
| HPX | HPEX4L-06 | 6*20*C0.08*75*6 | 6 | C0.08 | 20 | 75 | 6 | 4 |
| HPX | HPEX4-08 | 8*20*C0.1*60*8 | 8 | C0.1 | 20 | 60 | 8 | 4 |
| HPX | HPEX4-08L | 8*24*C0.1*60*8 | 8 | C0.1 | 24 | 60 | 8 | 4 |
| HPX | HPEX4L-08 | 8*25*C0.1*75*8 | 8 | C0.1 | 25 | 75 | 8 | 4 |
| HPX | HPEX4X-08 | 8*25*C0.1*100*8 | 8 | C0.1 | 25 | 100 | 8 | 4 |
| HPX | HPEX4-10 | 10*25*C0.1*75*10 | 10 | C0.1 | 25 | 75 | 10 | 4 |
| HPX | HPEX4-10L | 10*30*C0.1*75*10 | 10 | C0.1 | 30 | 75 | 10 | 4 |
| HPX | HPEX4L-10 | 10*30*C0.1*100*10 | 10 | C0.1 | 30 | 100 | 10 | 4 |
| HPX | HPEX4-12 | 12*30*C0.12*75*12 | 12 | C0.12 | 30 | 75 | 12 | 4 |
| HPX | HPEX4-12L | 12*35*C0.12*75*12 | 12 | C0.12 | 36 | 75 | 12 | 4 |
| HPX | HPEX4L-12 | 12*35*C0.12*100*12 | 12 | C0.12 | 36 | 100 | 12 | 4 |
| HPX | HPEX4-14 | 14*34*C0.12*100*14 | 14 | C0.12 | 30 | 100 | 14 | 4 |
| HPX | HPEX4-16 | 16*36*C0.15*100*16 | 16 | C0.15 | 36 | 100 | 16 | 4 |
| HPX | HPEX4-16L | 16*45*C0.15*100*16 | 16 | C0.15 | 45 | 100 | 16 | 4 |
| HPX | HPEX4L-16 | 16*50*C0.15*150*16 | 16 | C0.15 | 50 | 150 | 16 | 4 |
| HPX | HPEX4-18 | 18*40*C0.15*100*18 | 18 | C0.15 | 40 | 100 | 18 | 4 |
| HPX | HPEX4-20 | 20*45*C0.15*100*20 | 20 | C0.15 | 45 | 100 | 20 | 4 |
| HPX | HPEX4L-20 | 20*55*C0.15*150*20 | 20 | C0.15 | 55 | 150 | 20 | 4 |
MSU have rich stock for standard micro drills, if have stock, we can ship to you within 3 days. please download our 2026 Micro drills catalogue for speficiation of micro drills.
“Our micro drill bit diameter tolerance is strictly controlled within ±0.002mm , and the shank diameter tolerance is h6 standard. Regarding runout, each batch undergoes high-magnification optical inspection before leaving the factory to ensure that the runout is controlled within 0.005mm , minimizing the risk of drill breakage and ensuring the consistency of hole diameter.”
“We offer a variety of coatings, including TiAlN (TiAlN) and DLC (Diamond-like Carbon). To address chip removal challenges, our micro-drills feature mirror-polished chip evacuation grooves . This significantly reduces cutting resistance and prevents built-up edge (BUE) formation, making them particularly suitable for deep hole machining.”
“While our unit price may be slightly higher than that of lower-end brands, by increasing tool life by 30% and reducing scrap rate by 0.5% , your ‘overall machining cost per hole’ is actually lower. For customers with high annual usage, we offer tiered pricing and annual rebate agreements.”
Yes, we can produce as per client’s drawing or request, then our engineer will make drawing for confirmation, we will produce samples for testing after client’s confim. MSU Provide High-precision machining solutions, improved micro-hole machining yield. wholesale micro-drills, reduced tooling costs.
Yes, our MSU426 series is suitable for stainless steel.
