Spindle RATTMMOTOR
2.2kW 80mm Water-Cooled Spindle Kit (ER20)
$230
Overview
The single most popular spindle upgrade in the hobby CNC world. The ER20 collet accepting up to 13mm shanks is the key feature — it covers all common router bit sizes including 1/2 inch. Kit includes spindle, 2.2kW VFD, 80mm bracket, water pump, hoses, and ER20 collet set.
Best for
Mid-range hobbyists cutting wood, plastics, and aluminium who want quiet continuous-duty power
Pros
- ER20 collet accepts all common bit sizes up to 13mm
- Significantly more power than trim routers
- Quiet operation (55–65 dB) with continuous duty
- Most widely used spindle upgrade in the hobby CNC community
Cons
- Heavy at 4.5 kg — Z-axis must be designed for the weight
- VFD configuration and water cooling adds setup complexity
- 80mm body requires specific mount
- Quality varies between Chinese OEM sellers