Safeguarding Standards for Bench and Pedestal Grinders Grinders are one of the most frequently cited machines during OSHA machinesafety inspections. This is frequently due to improperly adjusted workrests and tongueguards on bench/pedestal grinders, as well as a lack of ringtesting for the grinding wheels. OSHA 29 CFR SubPart O is a "machine specific" (vertical) [.]