Milwaukee M12 Vs M18 Grease Gun: Which Packs More Power?

The Milwaukee M12 grease gun is smaller and more compact, making it ideal for tight spaces. On the other hand, the Milwaukee M18 grease gun offers more power and a larger canister capacity for heavy-duty applications.

When deciding between the two models, consider your specific needs and the level of power and flexibility required.

Both M12 and M18 grease guns offer exceptional performance and reliability, making them top choices for professionals and enthusiasts alike. Whether you need a compact solution or maximum power, Milwaukee has you covered.

Milwaukee M12 Grease Gun Vs Milwaukee M18 Grease Gun

Power Source

In the world of grease guns, the power source is a crucial factor to consider. Both the Milwaukee M12 and M18 grease guns offer outstanding performance, but their power sources differ in several aspects.

Let’s delve into the details of their battery type and capacity as well as their voltage and power output.

Milwaukee M12 Grease Gun


Battery Type and Capacity

The Milwaukee M12 grease gun is powered by a 12-volt lithium-ion battery. This compact and lightweight battery provides sufficient power to tackle various lubrication tasks.

With the M12, you can expect smooth operation and a consistent grease flow to keep your equipment running efficiently.

On the other hand, the Milwaukee M18 grease gun utilizes an 18-volt lithium-ion battery. This larger battery offers a higher capacity, enabling you to complete more demanding lubrication jobs without the need for frequent recharging.

The M18’s battery is designed to provide long-lasting power, ensuring optimal performance during extended use.

Voltage and Power Output

The 12-volt battery of the Milwaukee M12 grease gun delivers ample voltage to handle most grease application tasks with ease. It provides a balanced level of power to ensure smooth and efficient operation while prolonging the lifespan of the battery.

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With its 18-volt battery, the Milwaukee M18 grease gun offers even more impressive voltage and power output.

This higher voltage allows for enhanced performance, especially when dealing with heavy machinery and equipment that require substantial lubrication. The M18’s power output ensures consistent and forceful grease dispensing, making challenging lubrication jobs a breeze.


The performance of a grease gun is a crucial factor to consider when selecting the right tool for your needs. Both the Milwaukee M12 and M18 grease guns excel in delivering exceptional performance, ensuring that your lubrication tasks are carried out efficiently and effectively.

Milwaukee M18 Grease Gun



Grease Output and Pressure

The Milwaukee M12 and M18 grease guns offer impressive grease output and pressure capabilities. The M12 grease gun delivers up to 7,000 PSI of operating pressure, making it ideal for tackling heavy-duty applications that demand high force.

Whether you are lubricating large industrial machinery or working on agricultural equipment, the M12’s high-pressure performance ensures thorough and precise lubrication.

On the other hand, the M18 grease gun generates a maximum operating pressure of 10,000 PSI, making it even more powerful than its M12 counterpart.

This increased pressure capability allows you to tackle the toughest lubrication challenges with ease. Whether it’s heavy machinery or construction equipment, the M18 grease gun ensures optimal grease distribution, protecting your equipment and extending its lifespan.

Suitability For Different Applications

The Milwaukee M12 grease gun’s combination of high pressure and compact size makes it particularly suitable for a range of applications.

If you work in tight spaces or need to navigate through crowded machinery, the M12’s smaller form factor provides ease of maneuverability. Its versatility and portability make it an excellent choice for automotive maintenance, small machinery, and general maintenance tasks.

Alternatively, the Milwaukee M18 grease gun’s increased pressure capability and longer runtime make it a perfect fit for demanding industrial applications.

When dealing with heavy machinery, agricultural equipment, or construction sites, the M18’s power and extended operating time ensure uninterrupted lubrication. You can rely on the M18 grease gun to handle any heavy-duty lubrication task with precision and efficiency.


The Milwaukee M12 and M18 Grease Guns are both popular choices for professional mechanics and DIY enthusiasts.

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Both models are designed to deliver high performance and are equipped with unique features that cater to different user preferences. In this section, we will compare the features of the Milwaukee M12 and M18 Grease Guns under different categories.

Size and Weight

The Milwaukee M12 Grease Gun is compact and lightweight, weighing only 7.2 pounds. Its smaller size makes it easier to maneuver in tight spaces, perfect for tasks that require precision and control.

On the other hand, the Milwaukee M18 Grease Gun is slightly heavier at 7.9 pounds due to its larger battery, offering longer runtime.

Additional Functions and Accessories

Both the M12 and M18 Grease Guns come with a built-in LED light, allowing users to illuminate their work area for enhanced visibility.

The M18 model, however, offers a lock-on and -off trigger, providing continuous flow for extended grease applications, while the M12 features a versatile 36-inch flexible hose for reaching tight spaces with ease.

Price and Value

When choosing a grease gun, it’s important to consider both the price and value of the product. The Milwaukee M12 and M18 grease guns are both popular choices among professionals and DIY enthusiasts.

In this section, we will explore the initial cost, long-term cost, and return on investment (ROI) of these two models to help you make an informed decision.

Initial Cost

The initial cost of a grease gun is an essential factor to consider. In the case of the Milwaukee M12 and M18, there is a difference in price between the two models.

The M12 is generally more affordable, making it a great choice for budget-conscious buyers. However, it’s important to keep in mind that the initial cost is not the only aspect to consider when evaluating the value of a grease gun.

Long-term Cost and ROI

Besides the initial cost, it’s crucial to assess the long-term cost and return on investment (ROI) of a grease gun. The Milwaukee M18 grease gun may have a higher initial cost, but it provides numerous advantages that can contribute to long-term savings.

One such advantage is its larger battery capacity, which allows for extended use without frequent recharging or battery replacement. This reduces downtime and increases productivity, ultimately offering a better ROI over time.

Additionally, the M18 grease gun often comes with advanced features such as a variable speed trigger and a lock-on/off button, which can enhance user experience and efficiency.

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Despite the higher initial cost, the M18 model’s longevity, reliability, and additional features can result in long-term cost savings and improved performance.

In summary, while the Milwaukee M12 grease gun may have a lower initial cost, the M18 offers more value in the long run. Its superior battery capacity and advanced features contribute to increased productivity and cost savings over time.

It’s important to consider not only the initial cost but also the long-term cost and ROI when making a decision. Assess your needs, budget, and preferences to determine which model is the best fit for you.

Frequently Asked Questions On Milwaukee M12 Vs M18 Grease Gun

What Is The Difference Between Milwaukee M12 And M18?

The main difference between Milwaukee M12 and M18 is the battery size. M12 has a 12-volt battery, while M18 has an 18-volt battery. This means that M18 tools generally offer more power and longer runtime compared to M12 tools.

What Type Of Grease Gun Is Best?

The best type of grease gun depends on your specific needs, but generally, a simple lever-action grease gun is the most versatile and easy to use for most applications. It provides good control and is suitable for both DIY and professional use.

Does Milwaukee Make An M12 Grease Gun?

Yes, Milwaukee does manufacture an M12 grease gun. It is a compact and efficient tool for lubricating machinery and equipment.

What Is The Flow Rate Of The Milwaukee M18 Grease Gun?

The flow rate of the Milwaukee M18 grease gun is X ounces per minute.


Ultimately, whether you choose the Milwaukee M12 or M18 grease gun, both offer top-notch performance and durability. Consider your specific needs and preferences when making your decision.

Both models are reliable and efficient, ensuring smooth operation and effective lubrication. With either option, you’ll have a solid tool at your disposal for keeping your machinery running smoothly.

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