These units were sold as head assemblies only, and assumed people would use their existing bases. That’s fine, but now, however old the bases were then, they are twenty years older now.
I have just finished supplying two customers who had left hand machines with the new State-Of-the Art Brushless DC Motor driven direct drive bases.
First comment: “Insane low speed torque.”
And it’s QUIET. No slipping belts or rubber cones.
I have settled on a motor that delivers 2/3 Horsepower at up to 3,000 RPM.
For forever life I derated the 48 Volt motor to 36V.