Greasing involves forcing grease into a bearing through the zerk. Grease guns are capable of producing high pressure because sometimes the old grease has congealed and blocks the flow of new ...

Joints come with or without zerk grease fittings. Those without are prelubed from the supplier to last the life of the joint.

The twisty Axle Grease Trail in Scottsdale's McDowell Sonoran Preserve delivers vast boulder fields, saguaro forests and mountain views.

Proponents of nongreasable U-joints state that drilling a hole in the cross of the U-joint and tapping it for a grease zerk weakens the body of the joint.

Our trailering experts recommend traveling with a box filled with extra grease, bearings, and a grease gun that works with Zerk fittings.