No,actually I didn't know that.I've seen that bearing design on machine tools though.
That is a Vermer grinder.The bearings are Link-Belt forged pillow blocks.
Tom got that machine pretty cheap but he is going to have to dump about $1500 in it.It has a relatively new diesel but needs a lot of work on the wheel drive mechanism.
The man that originally owned it,suffered a stroke.That machine was his only source of income,for about 12 years.He ground stumps from Dayton to Toledo and actually did real well financialy.He had done Tom s stump grinding for years and wanted him to have the machine,thus the low price of $4200.