1/4hp = 1800 rmp 1/2" shafts
1/2hp = 3600 rpm, 120v.
**The new 1/4hp buffer operates the same at the original 1/4hp however it has extended shafts by 1" on each end to make it easier to keep knives away from the housing. It is painted red, to avoid confusing it with the 1/2hp grinder.
**This unit is sold with no attachments allowing you to add the attachments that will work best for you. (Pictured 1/2hp with 10" and 6" Expander Wheels and Guards)