400W Spindle Motor

Sourcing

• Sourcing - [1]
• Banggood - $57 - 12-48V , 3000-12000 RPM [2]

Larger

• Larger - 110DC, 600W - $60 - [3]
• 800 W - $50 - China sourcing - [4]
• about 1 kW DeWalt router - [5]

Methods

• Low torque high speed tool - use high RPM - such as 12,000 RPM
• What about milling with high torque, low speed tools such as heavy duty mill as opposed to routing?

Calculations

• Feed rate on Aluminum with ShopBot should be 1 thou per revolution. [https://www.reddit.com/r/CNC/comments/7mlhyy/cutting_aluminum_on_shopbot/

Industry Standards

• Fab Academny on ShopBot - [6]. Works best with 1/8" bit according to their info. ShopBot appears to be 2.2 or 4.4 hp
• 400W spindle - [7]. 0.15 mm cuts, feed rate of 700 mm/min (about 30 IPM)
• Reddit thread - [8]
• Pro milling of aluminum - [9]
• Heavy machining - 14 hp and 5000 RPM for 1" bit - [10]