What are the Best Grease Guns: Flexible hose vs. Rigid tube

Flexible hose vs. Rigid tube

Flexible hose vs. Rigid tube

The decision to use flexible hose or rigid pipe depends on the type of grease gun that the machine has and its ease of access, as well as the type of grease gun to be used. For example, in hard-to-reach locations it is more practical to use a flexible hose. On the other hand, grease guns with lever arm require both hands to be operated and the best option is the rigid tube.

Volume counters for grease guns can be adapted to optimize lubricant consumption. Plastic caps provide benefits by preventing corrosion and contamination with dirt. You can also place color codes to prevent cross-contamination. There are other accessories available, such as sonic / ultrasonic devices.


The grease fittings have different names, such as Zerk, grease nipples, greasers, or Alemite. This is the lubrication point where the grease gun connector is placed. The hydraulic greaser is the most commonly used in standard applications. It can be placed in an upright or angular position. The button-type grease fitting is ideal for a good coupling when large amounts of grease are added. When the space does not allow the use of standard protruding accessories, a plug-type grease fitting is preferred, while a grease fitting with a relief valve can prevent high pressures that can damage the seals.

Risks to the health of the machines associated with grease guns

High pressure grease gun

A manual grease gun is designed to deliver grease from 2,000 to 15,000 psi. Applying too much pressure during reaming can damage bearing seals, which rarely withstand pressures above 500 psi. Symptoms that a high-pressure grease gun has been used include the collapse of the bearing shields, damage to the seals, grease in the electric motor windings and aspects related to safety and the environment.

Frequency of rengrase

The optimal administration of regreasing frequencies is necessary to prevent long-term problems in the health of the machinery. If the frequency is very high, symptoms such as lack of lubrication may appear, which promotes wear, friction and contamination of the grease. If the frequency is very short, it can produce a high fat consumption and safety and environmental problems.

Excess and lack of lubrication

It is important to estimate the amount of fat to avoid applying too much or too little fat. Symptoms of excess grease include damage to seals and motor windings, environmental problems, and fluid friction, which increases heat generation, accelerated oxidation of grease and high energy consumption. Symptoms of lack of grease include insufficient lubricant in the bearings, resulting in wear and increased contamination.

How the dispatched quantity is measured

It is common for maintenance departments to have a wide variety of types, brands and models of grease guns. This can cause fat-related disorders due to cross-contamination and an inadequate knowledge of how much a grease gun delivers by bombing. It is known that grease guns vary in the amount of fat they dispense, going from 0.5 to more than 3 g per bomb. This inconsistency depends on factors such as the type, model and age of the grease gun.

To overcome this problem, it is necessary to calculate the amount of grease that is dispensed by the grease gun at each pump. To calculate it, use a precision balance and place 10 equal bombs of fat on the scale. Once that amount is weighed, divide it by 10 to obtain the amount of grease that the pistol delivers by bombing.

Best practices for the use of grease guns

Calculate the correct amount of grease required for the relubrication of the bearings based on the amount of grease dispensed by a calibrated best grease gun
Use a relief purge at the bearing drain port to remove all old grease and prevent overpressure in the bearing.
Extreme care when placing grease on the hand gun to prevent the entry of contaminants. If you use cartridges, be sure to remove the metal cover to prevent metal splinters from entering the grease.
Make sure that the gun is correctly identified with the type of grease with which it must be loaded. Do not use another type of fat, just use the one that is identified.

Always make sure that the grease gun nozzle is clean before use. Pump a small amount of grease through the nozzle and clean it with a lint-free towel before attaching it to the machine's grease fitting.

Clean the grease fitting of any dirt before connecting the grease gun. Inspect and replace it if it finds any damage. It is very helpful to place plugs on the grease fitting to keep them clean; however, you must clean them before applying grease.
Be sure to use the correct grease at each lubrication point. Applying the wrong grease can lead to incompatibility problems, which can cause the bearing to fail quickly. The lubrication points must be clearly identified with the grease that must be used. This can be done with colored labels, stickers or with markers. The use of the LIS system can be very useful in this identification.
Grease guns should be depressurized before storing them in a clean, cool and dry area. They should be placed horizontally to prevent separation of the oil from the thickener (bleeding). The use of clamps makes it easier to store and organize the grease guns. Additionally, cover nozzles or couplings to prevent dirt and contamination buildup.

Regularly calibrate the grease guns to ensure they deliver the correct volume of grease.
best practices for the use of grease guns Anatomy of a grease gun

Anatomy of a grease gun

The lever is used in grease guns configured to manually pump grease from the cylinder to the hose or rigid tube.

The trigger and the grip on the grease guns are configured to manually pump grease from the cylinder to the hose or rigid tube, in the same way as those equipped with lever.

The cylinder is the skeleton of the grease gun where the grease tube or the grease supplied in bulk is placed.

The grease tube (or cartridge) is an insert filled with grease that is changed when the fat runs out.

The hydraulic coupling (or connector) is the connection point that allows coupling the hose or the rigid tube that is connected to the head of the grease gun.

The grease gun head contains the conduits and valves that allow the pumped grease to pass from the cylinder to the hose or rigid tube.

The filling nipple is the point where the grease is injected into the gun from a filling pump.

Air release valve allows air to escape after grease has been added to the grease gun and pumped into the head.

The spring supplies the pressure on the plunger.
The follower helps the plunger move smoothly while maintaining pressure on the bottom of the grease tube. It also acts by retracting the spring before inserting a new grease tube.
The handle allows you to pull the rod and then insert a new tube of grease.
The plunger provides uniform pressure on the bottom of the grease tube as the grease is consumed.
The flexible hose is used interchangeably with the rigid tube for flexible placement of the connector or coupling.

Why your car doors are like they are

They were not always there and in their evolution have emerged more types (each more rare) than you would imagine.

In the automotive world, most of the time the design is subordinated to the function. More space, better aerodynamics ... As a general rule, the option that is imposed is the most practical or the one that offers a better relationship between quality and price. The consequence, almost always, is that overlooked elements that have much more development than one might suppose.

Among those great forgotten are the doors. Yes, the doors, something that a priori may seem trivial and, surely, boring. Operate the shooter, open, enter, close and end the matter. But, although we are so accustomed to them, they were not always there.

The first automobiles, relays of the carriages at the end of the 19th century, did not have them. The reason? The builders had not even considered it: the only objective was for the car to work and, later, for it to be faster. In that context, in which security or comfort were still unknown concepts, the doors, which added weight to the whole and complexity to its construction, did not make sense for the manufacturers.

Perhaps tired of having to wear almost driving glasses or tired of enduring the dust of each trip, in the 1920s the interiors and doors began to be common in the new models, although with a configuration inherited from the carriages of horses : they opened from front to back, with the hinge at the back, in what has been popularly called 'suicidal' opening.

The name does not leave much room for the imagination (it is something that the gangsters contributed with their adjustments of accounts), but although they were maintained on a regular basis until the middle of the twentieth century, they soon imposed the doors now considered conventional, with the hinge in the front part. There is no historical reason for this, but reasons such as the simplicity of the mechanism, its reduced cost or the fact that in case of accidental opening the aerodynamic pressure causes them to close again by themselves, are possibly its main supporters.

Despite its preponderance, in the current market there are many different types of doors, each one more picturesque. Some have disappeared almost completely due to history or safety issues, while others are almost exclusive to supercars or luxury cars because their complex systems make the product too expensive. This does not mean that they are mere additions to show exclusivity: many of them are even more practical and comfortable than the usual one found in almost all the models of generalist brands.


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