Astro Pneumatic Tool 101 Mini Grease Gun

A small grease dispenser. This is a great product. The price is good. Filling the dispenser is awkward. A piece of folded cardboard is useful. Most importantly this grease gun works well.

I picked up this grease dispenser and couldn't be happier. I primarily use it for bicycle maintenance and have only tried filling with all-purpose grease. The dispense pattern is super fine which I appreciate but it still has enough depression to dispense a lot if you wish. I also picked up a few large syringes to fill with less used materials. They also are capable of reaching spots that are a little too tight for the grease gun to navigate to. If you are interested in the syringes I have pictured here, they can be found here: https://amzn.to/4vgZgIL I wouldn't hesitate to recommend this grease gun. I didn't think it would be all that special but it is actually really great.

So far, I'm really happy with this product. The price is competitive and it does everything that you'd expect from a small hand grease gun, which isn't a surprise given how long this design has been in production (the earliest versions date back to the 1930s and Dualco has owned the patent since the 1950s). My only gripe with the thing is the body doesn't seem to seal well against the head/pump mechanism on its own. I think this is a design feature, there's a cast slot cutting across the threads on the bump, but I can't identify the justification for its inclusion in the mold/final product. When you prime the device, you use something inserted into the bottom to force the grease into the pumping mechanism. On mine, which doesn't seem flawed from the factory, there is a little grease that escapes where the body/grease reservoir threads into the head/pump mechanism. Let me emphasize that, once fully primed and running, the tool works flawlessly. But, I still felt the need to cut a small piece of .060", oil resistant silicone gasket material to insure a positive seal. With the seal in place, the two components seam to seat together more firmly and there is no loss of function, so I'm not sure why it was omitted from the product. This is a very useful tool for bicycle and tool service/repair, and I would happily buy it again, but I think it feels better with a gasket of some kind between the body and pump. Also, Astro Tool should really have them cast their emblem or put a logo sticker on the side because there is nothing that really differentiates this from generic copies.

Bought this several years ago and only just now decided to fill it and try to use it in 2025. It is well made and feels good but is messy to fill if you have a tub of park tool grease. Would be easier with a squeeze tube, probably but more expensive. The messiness is why I didn’t ever use it before. Once filled, it somewhat worked but had a split stream of grease coming out and then stopped putting out any grease at all. I may have needed to press the plunger up but I’m not sure. I assumed the nozzle was clogged and used a tiny piece of wire to ream out the hole in the nozzle. After doing this a few times the grease was a small single stream. I did press up on the plunger during this also so that undoubtedly fixed the no grease part. All of my prior grease guns have been spring loaded so this is new to me. Overall it’s good but I haven’t used it in a real project/maintenance task yet but assume it will be fine. I took off one star for the issue with the nozzle that teaming it out fixed. I assume it was a burr in there. If you have similar issues, that may be worth trying.

Gonna be honest, I was sceptical at first. But after 2 years of using those small syringes to try and fill linear carriages, I was done. I should have bought this two years ago! Not only is it the same size as the syringes, it's also way easier to use! I use this for all my 3d printers now, and it's amazing. The only thing you should do before using(after filling with ep2) is use some ptfe pipe tape on the threads. Yes some will still try to force itself out of that "notch" but it's negligible. Do your hands a favor, get it now!(And look for an extension tube for those hard-to-reach carriages)

Love it, no more messy fingers for small parts grease applications. It's not really pneumatic, it's manual loading and compression. It works very well and for small parts it is a huge improvement over the large amount of grease that extrudes from a standard grease gun.

Works smoothly, filled with a squeeze tube of grease. Very neat and tidy

I made the purchase to grease bar on a chain saw, however the nozzle was to small to work. I had one like it so I ground the tip down a little and it sealed against the bar and worked. I returned this one as I no longer needed it. I think manufacturer should add a little larger nozzle with the item and it would be perfect for bicycles and chain saws. It looked great and probably worked fine.

when filing up for the first time, push the metal bottom plate up until it's almost at the top. Leave a small volume available and then fill in the grease. As you add more grease, the bottom plate will move back down. It's less messy this way. Thanks to another reviewer who suggested this. For ease of filing, I used an old butter knife. Crazily enough, I had to use a sharp pin / panel nail to burst the sprout open. It was completely sealed. Once that's out of the way, works like a charm. Well made basic grease gun for my bike repairs.

Ich habe mir die Astro 101 Mini-Fettpresse mit Nadel-Düse für feinere Schmierarbeiten gekauft und bin wirklich begeistert. Die Größe ist ideal: sehr handlich, leicht zu führen und perfekt für Stellen, an die man mit einer normalen Fettpresse kaum oder gar nicht herankommt. Die Nadel-Düse ist ein echtes Highlight. Damit lässt sich das Fett extrem gezielt aufbringen, ohne alles zu verschmieren oder unnötig Material zu verschwenden. Genau das war mir wichtig, z. B. bei Lagern, Gelenken oder kleinen Mechaniken. Die Verarbeitung wirkt insgesamt solide und hochwertig, nichts fühlt sich billig an. Auch die Dosierung funktioniert sehr kontrolliert, man hat jederzeit das Gefühl, die volle Kontrolle zu haben. Für Wartung, Modellbau, Werkstatt oder auch feinmechanische Arbeiten ist diese Mini-Fettpresse wirklich ideal. Insgesamt ein durchdachtes, zuverlässiges Werkzeug, das genau das tut, was es soll. Für mich eine klare Kaufempfehlung – würde ich jederzeit wieder kaufen!

Heel handige vetspuit voor het fijne werk. De opening is klein zodat je minimale hoeveelheden vet goed kunt doseren. Pompje werkt heel goed en is goed te doseren.

Worked perfectly, no issue with nozzle, important to follow instructions Re: filling it with grease and priming it before use.

Awesome little tool. I've now greased everything i could not reach before.