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Gorilla Mill Silverback End Mill Serials. A descendant of Gorilla Mills.
Aluminum Cutting Pro.
Made in USA.
- Variable flute. Engineered to repel aluminum. For roughing and finishing of non-ferrous materials, aluminum, copper, brass, plastic, etc. High velocity, high material removal rate. Center cutting.
- Available in special diameters, lengths and completely resharpenable.
- Should be run at specific parameters. See “Speeds and Feeds” chart HERE.
Gorilla coatings:
- are just a few thousandths of a millimeter thick but harder than steel; these low-friction coatings are extremely wear-resistant and chemically inert. The optimum coating is determined on the basis of both conditions of use and economic considerations.
About the ZrN Coating:

- Structure: Monolayer
- Nanohardness (GPa): 20
- Friction (fretting) Coefficient: 0.4
- Thickness (µm): 2-4
- Maximum Working Temperature: 550° C (1020° F)
- Color: Pale Yellow
Cutting Materials:
- Aircraft Aluminum, (2000,5000, 7000 series), Soft Aluminum, (6061), Copper (200 Brinell <), Copper (200 Brinell >), Cast Aluminum (6% Silcon & <), Cast Aluminum (6% Silcon & >), Brass, Bronze
Machining Method:

Tolerance:
- Cut Dia +.000/-.002,
- Shank Dia -.0001/-.0005,
- LOC +.025/+.050,
- OAL +/-.050
Dimensions:

| Accusize Item# |
Gorilla Mill Item# |
D1 Cutting Dia. |
Shank Dia | LOC | OAL |
Tool Length |
| 0002-1014 | GMA18FS3ZrN | 1/8" | 1/8" | 1/4" | 1-1/2" | STUB |
| 0002-1016 | GMA18FSH3ZrN | 1/8" | 1/8" | 3/8" | 2" | STUB |
| 0002-0425 | GMA18F3ZrN | 1/8" | 1/8" | 1/2" | 1-1/2" | STANDARD |
| 0002-1018 | GMA316FS3ZrN | 3/16" | 3/16" | 3/8" | 2" | STUB |
| 0002-0435 | GMA316F3ZrN | 3/16" | 3/16" | 5/8" | 2" | STANDARD |
| 0002-1020 | GMA14FS3ZrN | 1/4" | 1/4" | 3/8" | 2" | STUB |
| 0002-1022 | GMA14FSH3ZrN | 1/4" | 1/4" | 1/2" | 2" | STUB |
| 0002-0409 | GMA14F3ZrN | 1/4" | 1/4" | 3/4" | 2-1/2" | STANDARD |
| 0002-0410 | GMA14FL3ZrN | 1/4" | 1/4" | 1-1/2" | 4" | LONG |
| 0002-1024 | GMA516FS3ZrN | 5/16" | 5/16" | 7/16" | 2" | STUB |
| 0002-0475 | GMA516F3ZrN | 5/16" | 5/16" | 7/8" | 2-1/2" |
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