I'm sorry, but to me a slow-speed grinder doesn't involve a stone going
around at 1750 rpm.  A (tailed) Tormek wet grinder rotates at 90 rpm for
the big version, 120 rpm for the smaller version.  Those speeds are much
closer to the speeds that a human-propelled stone might go, and to me sound
like "slow speed" grinders.

​(Coming in for the very occasional post from my decades of lurking.)​

Michael D. Sullivan
Bethesda, MD