A grease gun (also called a brush gun or a pumping gun) is an invaluable tool used for lubricating nearly all moving parts in a machine. A grease gun uses compressed air to spray lubricant into a fitting, usually from a sealed grease cartridge onto a grease pipe or fitting. This type of equipment has many applications in the workshop, from filling canisters with diesel fuel to repairing an engine. It is commonly used in auto repair shops as well as garages. Many a mechanic has worked on a car or other vehicle with a greasing gun as the method of lubrication between engine parts.
If you are looking for a grease gun, you will first need to consider what its purpose will be. A hand-held gun usually runs at about fifteen,000 psi. This high pressure makes it easier to apply grease, especially for small fittings such as bearings. However, it can cause damage to delicate parts if you apply too much, or if you fire it up while it’s not being used. Also, high pressure means that the resulting air stream must be directed towards the part being lubricated, which can lead to poor lubrication and premature wearing.
The correct grease gun should have a twin-action trigger that feeds continuously through its nozzle, ensuring that the contents of the tube are fed rapidly and evenly into the appropriate slot. In order to lubricate bearings and other moving parts at high pressures, you will want a pump that is powerful enough to blow a gallon of grease per minute. You should also have a safety cover or other safety device installed on the nozzle assembly to prevent your hands from being crushed by the compressed air. You may also want to install a HEPA filter on your equipment to eliminate the use of toxic air while lubricating your fittings. It’s also a good idea to add a lubricant to the air when using a grease gun, as well.
After purchasing your grease gun, you should also consider installing an ejector port. An ejector port is an accessory that can be used to force a spent case out of a gun’s barrel. If you plan to use it, however, you should keep in mind that guns that don’t have an ejector port will be extremely difficult to work with, and you may find yourself constantly reaching for your gun to extract a spent casing. Grease guns that don’t have an ejector port should have a buffer port installed, which allows you to insert a case without striking the buffer.
As with other guns, a high-quality grease gun should be maintained on a regular basis. To do this, you should lubricate the submachine gun’s trigger, bolt, magazine, and breech plug on a regular basis. Visit your local gun shop for these services, or you can perform the steps manually. For example, after firing a shot, you should pull the trigger back and give the magazine a few seconds before it loads a round. This prevents the primer from becoming dull, which causes it to go off at the last minute.
To test your pistol grip grease gun, you should place a plastic bleeder over the BB. Slowly push the bleeder across the front of the BB, which should eject. To increase accuracy, the cavity should be equally distributed on both sides, as if it were fired from both a pistol and a submachine gun. If the cavity is too thin on one side, this will cause the BB to go off at the last minute, which will obviously increase inaccurate shooting. A thin cavity also provides less friction for the extraction process, which results in better accuracy.
Now that your new grease gun has been properly adjusted, you should fill the case with some old grease cartridge. Remove the priming mechanism from the case, and wipe off any residual dirt using a damp rag. Once the dirt is wiped away, you should insert the priming plug and push the plunger into the chamber, which creates suction. The suction increases as the plunger moves down, creating a vacuum.
Next, place the BBs in the chamber, and turn the gun upside down. With the priming plug and plunger rod in the upright position, slowly apply enough suction to force the BB through the opening. While the plunger works to force the BB down, ensure that the bearing is properly aligned with the chamber and that the old grease is securely pasted in the back. Once the old grease completely fills the chamber, take the BB and place it on top of the greased bearing. The friction created by the BB and the seal between the bearing and the BB creates the much needed pressure, which grips the bearing tightly, and pushes it down into the chamber.