AZUNO Grease Gun Coupler, 2nd Generation Upgraded to 12,000 PSI, Grease Gun Tips Quick Lock and Release, Compatible with All Grease Guns 1/8" NPT Grease Gun Fittings (Grease Gun Coupler 1pcs)

I haven’t had these locking couplers long but so far they do the job just as expected! They hold onto the zero fittings well and don’t leak. Releasing is simple and can be done even under pressure. One thing to keep in mind is clearance around protected fittings. This coupler body is larger than a standard non-locking coupler so it may not fit into every nook and cranny you find in the field. T hear being said, it fits on all the protected fitting on my tractor and implements. The price is a bargain too considering what the big name company is charging (I got 2 Azuno couplers for what 1 LockNLube coupler costs). I will continue to use these on my grease gun and update my review if necessary. Thanks Azuno!

Really happy with this purchase. It's very good quality, ery easy to install, and works as intended. I used it on a 30+ year old grease gun and it installed and worked perfectly. The coupler locks on grease fittings and makes lubing much easier without the coupler falling off. The only negative is that I had two fittings in a tight spot that I could not lube because of the larger diameter of this coupler. The problem was solved by switching back to the smaller OEM coupler for those two fittings which was fast and easy to do.

It's a little fat but it works very well. And the lever is designed in such a way that it should be less prone to breakage. EDIT: I'm knocking off a star for not being able to lock onto shorter, stubbier grease fittings. This coupler quickly bottoms out on the base of these shorter fittings so it won't lock. Then you need to manually hold it or it just pops back off. Very disappointing and annoying. Defeats the purpose of having a locking coupler.

This is my second grease gun couple. I used my grease gun on joints on my lawn tractor and some of the locations of the grease fittings are in very close quarters to some surrounding structures. Without one of these grease gun couplers, it is difficult to connect a standard grease gun end fitting to the fitting you are trying to grease. This enables you to push in and lock the coupler onto the grease fitting and also when you are done... a squeeze of the lever releases the coupler from the grease fitting. Really great if you have arthritis in your hands as I do. So take it from this 70+ "greaser" this AZUNO grease gun coupler is worth the money. I have owned one other of a different make that worked well for a couple of years, but then the lever that you squeeze simply snapped off... this product appears to be much more rugged. Time will tell, but for now... glad to have it.

I bought this because my regular grease gun tip grabs so tightly that I broke some zerks. In most cases this coupler works nicely. But it is just fat enough not to fit into some of the access points on both my Kubota tractor bucket and my boat lift mechanism. So now I am looking for a long, skinny adapter tube to use in these tight spaces, with a zerk on the feed end. I have found one on Amazon, but the tip end again looks a little fat. So to buy or not to buy? Just be aware. Works well, but maybe not in tight spaces. And I also have zerks on my boat lift that this will not click onto, even where there is ample space. Apparently not all zerks are the same dimensions.

I finally got rid of the stock coupler and bought this AZUNO because it was a little cheaper. The quality seems very good to me and it works really well. It's so much easier to use than the old fashioned grease couplers. I also bought a LockNLube 90 degree grease coupler adapter to use with it. I needed the adapter for my riding mower deck. Thankfully, they work together perfectly. There's not much to say other than "Why the heck did I wait so long to buy this?" If you have a grease gun, you need this (and probably the 90 degree adapter too).

Update: I have used this several times now and it may not be as good as I originally thought. I had several fittings where grease leaked by around the fitting. One major issue is this coupler definitely will not work in tight places. I have fittings that are very close to the hub and there is not enough room to fit the coupler onto the fitting. Was considering a return but noticed I missed the return window. When I opened the box I thought this was another item because of the weight. However, these couplers seem to be heavily built. I tried it out today and it worked as they said it would, clamped on and allowed no grease to leak by. I bought this to replace another brand coupler that leaked and it seems it is worth the money.

I have a 15ft brush cutter with a lot of zerts of various sizes. Some are easy to get access to and some take a special approach to get the coupler (traditional or specialty design) properly aligned to get the zert to take grease without it oozing outside the zert once the coupler is attached and pumping pressure is applied. This review concerns only the zerts that have direct and unobstructed access. The design of this coupler is such that when the lever is depressed the coupler mechanism retracts within the outer sheath. Once placed over the zert and the disconnect lever is depressed the jaws open up and you can feel the coupler engage the zert, but you have no visibility as to weather the couple has fully captured the head of the zert or not once the lever is released. A slight pull test seems to indicate that the jaws of the coupler have fully engaged the zert, but when pumping pressure is applied grease goes everywhere but in the zert. A more vigorous pull test will always allow the coupler to disengage from the zert without depressing the disconnect lever. The few zerts that I was able to get a solid connection on took grease effortlessly without making a mess. Having both hands free to run the gun is a new and welcomed experience, that is when it is properly connected to the zert head which seldom happened in the majority of the attempts. While I can not say exactly which zert style will and will not work with the coupler, it seamed that the zerts with the larger diameter heads coupled with a short stem to the threaded portion of the zert seemed to give the most problems. Apparently the jaws would not fully clamp around the base of the zert head. I did give the product due diligence in that I tried different combinations of lever depressions from partial to full travel with different approach angles and toward the end intense verbal encouragement. The majority of the time it just would not stay coupled. Too bad in that this appears to be a well made device, but the design is not universal enough to be of practical use in my world. There is a competing unit available where the outer sheath is retracted exposing the jaws instead of retracting the jaws within the sheath where you can not see anything. This type of design makes sense in that you should be able to make a visual confirmation of proper engagement before releasing the coupling lever to lock it in place. The drawback to that design is that it is much more expensive compared to the AZUNO.

Excellent

Good

Works pretty well, can be hard to get off of grease fittings some times, and if grease fitting is recessed the head is very large and hard to get in.

Perfect tool!!

It worked great for the first year and then it would not latch on any fittings. Used very little! However I reached out to them and they sent a replacement at no charge.