Here is another spindle motor but this one says 57mm diameter. Will still fit in the 60 mm quill and run off the stock grizzly speed controller. This will get you up to 8000 rpm with an ER11 chuck.
Use this motor for small cutters, switch back to the stock motor /spindle for hogging steel.
Baby details of technical parameters
Can be used for carving metal or non-metal materials
Radial runout of about 0.01-0.03:
Working voltage: 12-110VDC
Torque:4000 g / cm
Insulation resistance: >2me
The chuck portion length: 40mm
Chuck diameter : 16MM
Chuck: ER11 chuck with 3.175sandwich
Motor total length:220mm
Spindle weight:1.6 kg
The tail with a cooling fan
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I don't understand where the wires run though.... Through the fan blades?