• patented (7153067 7367754) variable flute and variable index design
• "GMP" edge preparation hones away the microscopic ridges in the flute edges——like a barber's strop
• "GMX-35" coated heat resistant to 1650ºF
• Radius corners for stonger edges and part radius.
• GMS² nano-composite coating: heat resistant up to 2200ºF
• ZRN coating is available, but is not necessary for aluminum with less than 5% silicon content
Hence the monicker:"Silverback"
• extremely high material removal rates while maintaining a superb finish in all materials
• patented variable flute & index design, edge prep, and highest TRS nanograin substrate available
• 45º champhered   • GMX-35 coated — heat resistant to 1650ºF
• Solid sub-micron carbide; extremely versital in various materials
• Uncoated or TiN, TiAlN, TiCN coatings
• Available in special diameters, lengths
We carry one brand of round tools and one brand of inserts (web pages in process).
Our variable helix, variable pitch, "GorillaMills" are made from the highest transverse rupture strength, nano-grain tungsten carbide substrate available.
These mills are engineered to run at 50 to 150 percent faster through all materials, at a greater chip load, than our very good, Standard sub-micrograin—also made in the USA—mill.
In fact, we present different speed/feed recommendations because of this difference
Several companies manufacture end mills that vary helix and pitch to reduce harmonic vibration. The varying helix and pitch is a patent protected design.
Most of them use a very good design patented by a Japanese company.
Gorilla, however, holds its own US patents. We have found that its improved designs usually produce 5 to 10 percent better performance than the other variable helix/pitch endmils, especially in harder materials like Inconel and titanium.
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1/2" "gorilla" mill; 1018 steel; No coolant. Slotting: 6/10" depth, 600 SFM, .002 chipload/tooth on 4 flutes. "Big Noise From Winnetka" 1938; written and performed by Bob Haggart, bass/whistling, and Ray Bauduc, drums.
"Big Noise From Winnetka" 1938; written and performed by Bob Haggart, bass/whistling, and Ray Bauduc, drums.