5 Best Grease Gun Couplers Reviews 2020

When your regular activities require you to grease your vehicle or equipment regularly, then you will need to have a grease gun coupler to make your greasing easy and less messy. Since there are a lot of grease gun couplers, then you need to do proper research to get the best grease gun coupler for your job. There are a few features you should look out for.

I will take you through the best grease couplers I have come across and how they can make your greasing easy. I will not hide some disadvantages I have noticed so that you make an informed decision.

Comparison Table of Top 5 Grease Gun Coupler

LockNLube Grease Gun...
Lumax LX-1403 Silver...
AZUNO Grease Gun Coupler,...
LockNLube Grease Gun...
Push-on Slotted Right...
LockNLube Grease Gun...
Lumax LX-1403 Silver...
AZUNO Grease Gun Coupler,...
LockNLube Grease Gun...
Push-on Slotted Right...
3.5 x 0.6 x 1.7 inches
4.8 x 1 x 4.8 inches
3.19 x 1.57 x 0.79 inches
5.50 x 0.97 x 1.50 inches
4.50 x 1.75 x 1.00 inches
4.2 ounces
2.9 ounces
6.4 ounces
5 ounces
0.64 ounces
-
LockNLube Grease Gun...
LockNLube Grease Gun...
3.5 x 0.6 x 1.7 inches
4.2 ounces
Lumax LX-1403 Silver...
Lumax LX-1403 Silver...
4.8 x 1 x 4.8 inches
2.9 ounces
AZUNO Grease Gun Coupler,...
AZUNO Grease Gun Coupler,...
3.19 x 1.57 x 0.79 inches
6.4 ounces
LockNLube Grease Gun...
LockNLube Grease Gun...
5.50 x 0.97 x 1.50 inches
5 ounces
Push-on Slotted Right...
Push-on Slotted Right...
4.50 x 1.75 x 1.00 inches
0.64 ounces
-

Reviews of the Best Grease Gun Coupler

01. LockNLube Grease Gun Coupler Locked onto Zerk Fitting

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When you want frustration-free greasing experience, then this should be your go-to gun grease coupler. It has a patented locking mechanism that you will not fume in other gun couplers. When using it, you will experience zero leaks, hence minimal mess and grease wastage. The coupler is easy to fit and release from the grease fitting.

Highlighted Features
  • It is a lock-on design that allows you to work without creating a mess in your workplace.
  • It is compatible with all grease guns available in the market.
  • It can withstand all pressures and adjust to any angle the grease gun or fitting creates.
  • It is a rebuildable grease gun coupler. Therefore you can replace worn out parts with ease.
Pros
  • You will make minimal or no mess.
  • You can replace the worn-out materials at home
  • It is easy to use. It also allows you to pump the grease with your two hands as you do not need to hold it during greasing.
  • It helps you keep your working area clean.
Cons
  • If you make a mistake when fitting, you will find it difficult to depress the gun pump.
  • There is no customer care at their website
  • It is hard to fit it onto tight places

02. Lumax LX-1430

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Lumax grease gun coupler is an excellent greasing tool. It is half an inch shorter than the LockNLube grease gun above. You can use this coupler with a high-pressure grease gun; it can withstand up to 15.000 psi.

Basing my review of customer experience, it is excellent and versatile. All grease guns can fit on the Lumax grease coupler.

Highlighted Features
  • It has a non-return valve, an excellent feature that makes it easy to disconnect from the fitting. The valve also allows the coupler to withstand the high pressures of up to 15000 psi.
  • It accommodates all types of grease guns: manual, air-operated, and battery-powered grease guns. You can also use it on bulk grease pumps.
  • The thump lever is of ergonomic design. It fits and releases effortlessly.
  • It has a 1/8 NPT connection that makes it accommodate different grease guns.
  • It has 4-jaws that withstand high pressure.
Pros
  • You will experience zero leaks when using this coupler.
  • You will only need this coupler for all grease guns or grease pumps
  • It works well on fittings at any angle up to 90 degrees.
Cons
  • It has an end of 5/8 inch; this makes it hard to grease a zerk with close spaces.

03. AZUNO Grease Gun Coupler, 2nd Generation

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AZUNO brand produces one of the best locks on grease couplers in the market. It is easy to use. The thump lever is well designed to release and fit the coupler on the grease fitting with ease.

AZUNO have an upgrade on their coupler brand. They made the second generation coupler an alloy of steel coated in zinc.

Highlighted Features
  • It has a sealing gasket accompanied by enforced jaws. These two features will prevent leaks at high pressure of up to 12000 psi. it makes the coupler perform exceptionally for a long time
  • The quality of steel making this coupler makes it strong to use in a shop or a garage.
  • Its 1/8 inch NPT makes it compatible with all types of grease guns and grease pumps.
  • Its retract mechanisms enable you to locate the zerk fitting even at blind spots.
Pros
  • Easy to fit in a zerk fitting even in a poorly lit location.
  • It has an easy working mechanism
  • You will have a mess-free greasing experience.
Cons
  • It has a wide outer diameter making it hard to work on tight spaces.
  • Some of its spare parts are not available in the market.

04. LockNLube Grease Gun Coupler XL

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LockNLube understands its customers’ needs; that is why they made another type of coupler that would swerve longer barrels. It is about 2 inches longer than a normal coupler. It is also 1mm thicker than the regular model.

If your grease fitting is deep inside your equipment, then this grease coupler is all you need. You will have an easy time greasing the harvester heads, U joints, axels, and other tools.

Highlighted Features
  • It withstands the pressure of up to 10000 psi. It does not leak once it locks pressure does not make it pop off.
  • The thumb lever kelps you fit and release easily from the fittings.
  • It is compatible with standard grease guns.
  • It is long enough to grease U joints, Harvester heads, and other joints located deep inside the equipment.
  • It has a rebuild kit that is easy to replace.
Pros
  • You can grease deep inside an equipment
  • You will have a mess-free experience.
  • You do not need to replace the coupler once it is worn out. You just need to replace the worn-out parts.
Cons
  • It does not fit all grease guns.
  • Its thickness makes it hard to fit on tight spaces.

05. Push-On 90 Degree Grease Coupler

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This is an easy to use grease gun coupler. You only need to push it in the zerk fitting when you are using it. It is an excellent alternative to use on those troublesome grease fittings. You can use it when other couplers have failed to fit.

Highlighted Features
  • It adapts to up to 90 degrees grease guns and fittings.
  • It is compatible with jaws of all grease guns in the market,
  • It fits tights of the fitting, and you will not have any leaks when greasing.
Pros
  • It worlds well with all grease guns.
  • It leaves your working area mess-free.
  • It is easy to push it in a grease fitting.
  • It is comfortable to use it in tight spaces.
Cons
  • It is difficult to remove it from the fitting since it does not have a lever.
  • It cannot withstand high pressures. Therefore you need to be moderate with pressure when pumping the grease.

Grease Gun Coupler Buying Guide

small grease gun tips
Image Credit: Farmers Weekly

Look out for the following when you go to buy a grease gun coupler;

Grease Fitting

Before you decide on which grease gun coupler you want to buy, know the kind of grease fittings you need to lubricate. It is possible all pieces of equipment you will need to lubricate have varied zerk. Therefore select a versatile grease coupler that is compatible with all.

Ensure that the coupler has ball checks that prevent contaminants and dust into the tube.

Select a coupler that is compatible with standard fitting zerk. This will ensure you do not have a lot of couplers in your toolbox.

Most couplers are of the standard fitting. But be careful not to buy others out of standard specifications.

The Thread size

Couplers are designed in varied thread sizes. A standard coupler should have a 1/8 NPT thread, which helps it to connect to the hose of the grease gun. A 1/8 thread will fit on manual, the battery operates, and air operated grease guns. You can choose a different thread type if your grease gun or greasing tool has special specifications. But in case it is your first time to buy, it is safe to buy the standard 1/8 NPT.

Jaws and Rubber Seals

The jaws are made of rubber. Four jaws are an indication that the seal is strong, and the coupler will withstand great pressures. Strong jaws ensure the coupler fits tight and hence no chances of leaking.

Pressure rating

A coupler with a high-pressure rating will remain intact even when the grease is under high pressure. Invest in a coupler that has a pressure rating of above 10000 psi. You will be sure that your coupler will not pop off and smear the whole area with gusts of grease.

Other Things to Consider

The other features you should look out for are the diameter if the coupler; large diameters will not fit narrow spaces. Check different models and customer reviews. Customers will give honest opinions about a product. Also, consider the grease gun you are using; some grease guns are only compatible with specific couplers.

Grease Gun Couplers FAQ

How do you use a grease gun Coupler?

The best grease gun couplers are easy to use. As you know, you cannot connect the grease gun directly to a grease fitting. You need a coupler that helps you grease easily with minimal grease leaks.

Take your coupler and gently slide it into the grease fitting at an angle. The action helps relax the jaws of the fitting. Ensure you center the coupler inside the fitting. When the coupler we stable in the fitting, you can fit the grease fun on the exposed end of the coupler and continue with your mess-free greasing.

How do you tighten a grease gun tip?

When you want to achieve a mess-free greasing experience, you need to ensure that the coupler fits tightly on small grease gun tips.

The end part of a gun tip is movable. When you fit the gun tip on the coupler, you twist that cup-like part until it tightens. If the cup appears bent, remove it, and fit it properly. If you tighten the grease gun without fitting well, you will experience leakage, which will mess up your space as you waste your grease.

How do you attach a grease gun to a Zerk fitting

Take the nozzle of your grease gun and place it in the zerk. Press your grease gun to a zerk fitting. When the grease gun locks on, you will hear a slight click. When you are using an adjustable grease gun, slightly unscrew it to make the fitting easier. You can then tighten the grease gun to make it hold tight and avoid leakage. Remember, if you do not attach the grease gun well, you will experience some leakage when you are pumping the grease.

How do you put grease in a grease gun?

Remove the head of the barrel as the first step. Loc ate the T handle and pulled it. That way, your handle will be secure. Clean the barrel for any mess caused by an old cartridge. Take a new cartridge, unseal, and insert it into the barrel. Ensure the barrel is air free before you seal it. Therefore, pump the handle to release any air present.

Return the barrel cap and close it tightly.

How do you grease flush-fitting?

There are those tiny fittings you need to grease. You use a flush-fitting technique. They are smaller than the standard fittings. If you are a newbie in greasing, you can miss out on greasing some crucial [arts. If you do not have a special coupler for the job, you will need to hold it longer so that the grease can penetrate. Let the pressure of the grease to be high so that it penetrates the fittings with ease.

Final Word

The best grease gun couplers allow you to work in a mess-free environment. Although some people opt to work without couplers, you will find the need to get one if you don’t like cleaning upon a mess. You will also save the grease that goes to waste when the grease gun leaks.

A Grease gun coupler will ensure that you access fittings on equipment at a certain angle. You will find out that using a gun without a couple is hard. Therefore, select one of the above grease gun couplers and experience a smooth greasing experience.

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Tito

Hi There, I am R. Hasan Tito, a mechanic, and owner of this website. My friend and I created this website to share our knowledge, expertise, and experience with our fellow mechanics' community and car users. I am a specialist and certified automotive mechanics (Both Heavy Commercial and Private Cars). I have been working as a mechanic for over fifteen years. I worked for a long time at Global Rebound Automotive companies (Toyota, TATA, BMW, Nissan, TVs, and Others ) as a Mechanic and Mechanics Supervisor.

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