What’s the actual rpm of the shopsmith motor?

[ShalomOrchard]

What’s the actual rpm of the shopsmith motor?

What’s the difference between the greenie head stock and the regular grey
Mark V 500 headstock? I know some have 7/8 hp, and some have 1-1/8 hp motors.
What other differences are thre?

[JPG]

Something slightly less than synchronous speed of 3600 rpm. Load variation will change it. 3450 rpm at rated load(hp) is likely close.

[chapmanruss]

JPG gave the correct RPM information for the Mark series motors. Something to note is that the Mark 5 Greenies and the early Mark 5 Goldies had 3/4 HP motors not 7/8 HP. The change to the 1-1/8 HP Motor occurred between March and April in 1961. The change to the Poly V drive from the Gilmer Drive occurred shortly after the motor change. Of note the last of the Gilmer Drive Headstocks with the 3/4 HP Motors and the first 1-1/8 HP Motors had a modified Gilmer Drive Sleeve Assembly and Quill. JPG's Goldie came with a 1-18 HP Motor and the Poly V Drive.

[JPG]

Another variation is my 1962 Mark 5 Goldie with a 240v motor and a hp rating of 1 hp.

[chapmanruss]

Sorry JPG, I misspoke. I didn't know you have a 240V motor version. I'm still learning things which is great.

[JPG]

Thee did not misspeak. That motor was and is an anomaly.