El cheapo cordless grease guns

[m_c]

I always wondered about grease gun pressure - my Samoa air one says 55:1 on it.

So if I putting 10 bar into it (144psi) - maths 55x144 = 7920psi...

Some of these battery ones - suggest a rating of 10000psi

I used to regularly test the limit of my M18 gun on recovery lorry pivots.
It's surprising how hard dry grease can go when subject to some road spray.

I reckoned the M18 gun used to save me about 15-20 minutes each inspection compared to using a manual gun.