GPP-4 Flute Flat End Mill

•  High-hardness and high-toughness substrate manufacturing, special negative angle design, material processing before and after heat treatment, universal for both soft and hard materials.
•  Can be used for CNC processing under high-speed conditions, oil mist, water cooling, oil cooling and other cooling environments.

Enhanced 4 Flute Flat End Mills

4 Flute Flat End Mills
SeriesCodeParameterDc(h7)LCL1SD(h5)Teeth number
GPPGPPE4-011*3*50*450 
GPPGPPE4-0151.5*4*50*41.5 50 
GPPGPPE4-022*6*50*450 
GPPGPPE4-0252.5*8*50*42.5 50 
GPPGPPE4-033*8*50*450 
GPPGPPE4L-033*12*75*415 75 
GPPGPPE4-03P3*8*50*650 
GPPGPPE4-0353.5*11*50*43.5 11 50 
GPPGPPE4-044*12*50*412 50 
GPPGPPE4L-044*15*75*420 75 
GPPGPPE4-04P4*12*50*612 50 
GPPGPPE4-055*13*50*613 50 
GPPGPPE4L-055*20*75*620 75 
GPPGPPE4-066*16*50*616 50 
GPPGPPE4L-066*25*75*625 75 
GPPGPPE4X-066*30*100*630 100 
GPPGPPE4-077*20*60*820 60 
GPPGPPE4-088*20*60*820 60 
GPPGPPE4L-088*30*75*830 75 
GPPGPPE4X-088*35*100*835 100 
GPPGPPE4-099*23*75*1023 75 10 
GPPGPPE4-1010*25*75*1010 25 75 10 A
GPPGPPE4L-1010*40*100*1010 40 100 10 
GPPGPPE4X-1010*55*150*1010 55 150 10 
GPPGPPE4-11-11*28*75*1211 28 75 12 
GPPGPPE4-1212*30*75*1212 30 75 12 
GPPGPPE4L-1212*45*100*1212 45 100 12 
GPPGPPE4X-1212*60*150*1212 60 150 12 
GPPGPPE4-1414*34*100*1414 34 100 14 
GPPGPPE4L-1414*60*150*1414 60 150 14 
GPPGPPE4-1616*36*100*1616 45 100 16 
GPPGPPE4L-1616*70*150*1616 70 150 16 
GPPGPPE4-1818*40*100*1818 45 100 18 
GPPGPPE4L-1818*70*150*1818 70 150 18 
GPPGPPE4-2020*45*100*2020 45 100 20 
GPPGPPE4L-2020*70*150*2020 70 150 20 
FAQ
We use nano-grade substrates, which increase bending strength by 20%. As long as the parameters are matched, the lifespan is very stable, effectively reducing downtime.
No. The chip removal groove is mirror-polished and extremely smooth, allowing chips to be discharged smoothly.
Strictly controlled within 0.003mm with this range, ensure precise hole diameter and avoid enlarging the hole.
Yes. We have a specialized series of nano-coatings that are high-temperature resistant, wear-resistant, and specifically designed for difficult-to-process materials.
Standard sizes are readily available and can be shipped on the same day; custom-made items can be delivered in as little as 7-10 days.

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.

Every single item has batch traceability. If there’s a quality issue, we respond within 24 hours and offer refund or replacement.

“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. 

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