Bestmilling bit

E. Fitzer, Carbon Fibers Filaments and Composites, ed. J.L. Figueiredo et al. (Dordrecht: Kluwer Academic, 1990), pp. 3–4.

For more information, contact Satish Kumar, Georgia Institute of Technology, School of Polymer, Textile and Fiber Engineering, 801 Ferst Drive, NW MRDC-1, Atlanta, Georgia 30332-0295; (404) 894-7550; fax (404) 894-8780; e-mail satish.kumar@ptfe.gatech.edu.

End Mill

R. Bacon and T.N. Hoses, High Performance Polymers, Their Origin and Development, ed. R.B. Sanymour and G.S. Kirshambaum (New York: Elsemer, 1986), p. 342.

MInus, M., Kumar, S. The processing, properties, and structure of carbon fibers. JOM 57, 52–58 (2005). https://doi.org/10.1007/s11837-005-0217-8

N.B. The cutting surface of a finger bit is always “on the side”. Never plunge a finger bit into a material in the Z-direction, only use a lateral motion in the X-Y plane. To plunge from top to bottom, use an interchangeable finger bit tip, or the segmented finger bit specifically designed for incremental cuts.

End Mill Cutter

Endmilling bit

W. Watt, Handbook of Composites — Volume 1, ed. A. Kelley, and Yu.N. Rabotnov (Holland: Elsevier Science Publishers B.V., 1985), pp. 327–387.

This paper reviews the processing, properties, and structure of carbon fibers. Carbon fibers are derived from several precursors, with polyacrylonitrile being the predominant precursor used today. Carbon fibers have high strength (3–7 GPa), high modulus (200–500 GPa), compressive strength (1–3 GPa), shear modulus (10–15 GPa), and low density (1.75–2.00 g/cm3). Carbon fibers made from pitch can have modulus, thermal, and electrical conductivities as high as 900 GPa, 1,000 W/mK, and 106 S/m, respectively. These fibers have become a dominant material in the aerospace industry and their use in the automotive and other industries is growing as their cost continues to come down.

As with other types of CNC tools, the following general rule applies: use an electroplated finger bit to work materials such as stone and marble; choose a sintered-segment finger bit to work hard stone such as granite, lava stone, basalt, or quartz. The bonding matrix is a very important factor when choosing the most appropriate sintered-segment finger bit. The bond must be chosen based on the material to cut:

Large selection of finger bits for all-natural stone, quartz, engineered stones, natural quartzite, ceramic and ultra-compact surfaces. (For the glass working: CNC glass cutting bit)

MetalmillingBits for drill press

La società MMG SERVICE SRL ha ricevuto nel corso del 2020 e 2021 gli aiuti di stato pubblicati sul RNA sezione Trasparenza.

Choosing the right sintered finger bit for a particular job can be confusing due to the vast assortment of bits available. Consult the following chart for assistance:

MillingBits for Steel

Common rule for soft materials (if you are cutting granite or quartzite it could not be valid): It’s best to cut all the way through as the tip of a bit wears n-times faster taking n passes instead of one. The best bit life is had with top speed and most material removed per pass within the limit of cut quality and machine power

Milling bitfor metal

Remember, a soft material requires a hard-bond finger bit whereas a hard material requires a soft-bond bit. 1/2” gas is the standard connection, however, we also have interchangeable bit tips with an M10 or M12 thread for the replaceable piece. Cylindrical shank or flange connections are also available.

Our vast assortment of Diamond CNC Finger Bits is intended for CNC machines, fabrication centers, and radial-arm machines. Fingers bits are one of the most common CNC tools used being employed to mill material and cut any type of curve in stone. We provide different types of finger bits to make fast, accurate, and enduring cuts in any material or job. Specifically, we offer:

Single-pass cutting if you want to get a better finish without having the steps visible and because it spreads the wear over a longer flute length, which means your tool will last longer. If you can cut in one pass and get a clean cut and good speed – do it. Multiple-passes cutting (incremental cutting) if you have a small CNC router and you need to cut without creating excessive tool deflection to minimize the risk of tool breakage or if the piece could move on the table.