This is a Morse 5:1 gear reducer. 5/8" input shaft with keyway, 3/4"
output shaft with keyway. Model L86MJ0001, Ratio 5, 18W (?), 1.38 HP,
1750 RPM.
The unit is in excellent condition, as can be seen on pictures. The
flexible shaft coupler on the output shaft can be removed. It rotates very
freely and gives a very pleasant overall feeling.