Hi, I built a large-ish CNC machine with a 2.2kw spindle and 7075 aluminum but and I am scared to use it because I cannot find reliable speed or feed values and I think the default values are too aggressive and will snap the tool. I have some aluminum 6061 plates I want to mill for a 3D printer heated bed support and other projects and I have some generic 2 flute and 4 flute high speed steel metric end mills each ranging from 2mm to 12mm. The smallest holes to mill are 3.4-3.6mm in diameter and the smallest fillets have a 5mm radius. I am guessing I should use the 2 flute 10mm end mill for clearing most of the material and the 3mm end mill for the holes. I could really use some help with the settings because I don't want to die if a tool explodes. I am using Fusion 360 and the default settings are: Speed: Spindle speed 5000 rpm Surface speed 78.5398 m/min Ramp spindle speed 5000 rpm Feedrates: Cutting feedrate 1000 mm/min Feed per tooth 0.05 mm Lead-in feedrate 1000 mm/min Lead-out feedrate 1000 mm/min Ramp feedrate 333.333 mm/min Plunge feedrate 333.333 mm/min Feed per revolution 0.0666666 mm https://reprap.org/forum/read.php?131,873927,873927#msg-873927 Thu, 08 Oct 2026 21:28:42 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?131,873927,874004#msg-874004 https://reprap.org/forum/read.php?131,873927,874004#msg-874004 sdavi CNC Routers, Mills, and Hybrid RepRapping Sat, 20 Jun 2020 07:18:51 -0400 https://reprap.org/forum/read.php?131,873927,873927#msg-873927 https://reprap.org/forum/read.php?131,873927,873927#msg-873927

I am using Fusion 360 and the default settings are:

Speed:
Spindle speed 5000 rpm
Surface speed 78.5398 m/min

Ramp spindle speed 5000 rpm


Feedrates:
Cutting feedrate 1000 mm/min
Feed per tooth 0.05 mm
Lead-in feedrate 1000 mm/min
Lead-out feedrate 1000 mm/min
Ramp feedrate 333.333 mm/min
Plunge feedrate 333.333 mm/min
Feed per revolution 0.0666666 mm]]> Power3DPrinting CNC Routers, Mills, and Hybrid RepRapping Thu, 18 Jun 2020 15:55:30 -0400