Capacity means published max pressure
Manual grease guns list a maximum working pressure. GreasePsi maps your required PSI to three verified VEVOR US classes.
Plan for packed fittings
Automotive and equipment fittings can need several thousand PSI before grease flows. Size so you are not stuck mid-job.
Couplers, hoses, and injection risk
Confirm coupler style. High-pressure grease can inject under skin — seek emergency care for injection injuries; never cover a fitting with your hand while pumping.
Safety rules this screen never relaxes
Wear eye protection. Confirm live max PSI and hose rating. Affiliate tracking is pending.
Class ladder on this site
GreasePsi maps required PSI to three verified VEVOR US guns: 6,000, 8,000, and 10,000 PSI. Sources reviewed include manufacturer pressure claims on the linked listings checked 2026-09-10.