1. Engineering Analysis – Spindle vs Router
Commercial Routers
Spindle Motors
Low to Medium Speeds (usually 400 to 24,000 RPM)
Extremely low run out (typically less than 0.005mm/0.0002”)
Need an inverter (capable of producing
Air or Water cooled options available
Higher average cost ($100 - $700)
Standardized collet sizes (ER11, ER20, R8, 3MT, etc.)
Quiet
High Speed (~25,000+ RPM) but with no control (one speed), will need aftermarket speed control
Large run out, not published as they are typically hobbyist and woodworking
Run directly from 120 VAC line power
Heat problem, not designed to be run continuously
Low average cost (Free - $200)
Brand specific collets
Loud
Higher cost of spindle motor justified by advantages
Inverter vs. speed control, ~ equal complexity (VFD)
More professional look and results from spindle
Justifies laser centering upgrade in the future