Top 5 Cordless Grease Guns for Heavy Equipment and Farm Maintenance in 2025

Keeping heavy equipment and farm machinery properly lubricated is essential for preventing downtime, reducing wear, and extending the life of expensive components. Traditional manual grease guns can be slow and physically demanding, especially when servicing multiple pieces of equipment across a large farm or jobsite. Cordless grease guns have revolutionized maintenance by delivering consistent, high-pressure grease application without the need for air hoses or manual pumping. In 2025, the market offers a range of powerful, battery-powered options designed for demanding environments.

Whether you are greasing excavator pins, tractor linkages, or conveyor bearings, choosing the right cordless grease gun can save you time and effort. In this guide, we review the top 5 cordless grease guns for heavy equipment and farm maintenance, highlighting key features, performance, and value. We also include a comparison table to help you make an informed decision. For those who already own Milwaukee tools, the M12 12-Volt Lithium-Ion Cordless Grease Gun is a standout choice that combines portability with high-pressure output.

Why Cordless Grease Guns Are Essential for Heavy Equipment and Farm Maintenance

Heavy equipment such as bulldozers, loaders, and combines have dozens of grease fittings that require regular lubrication. Manual grease guns can cause hand fatigue and inconsistent application, leading to under-lubrication or over-lubrication. Cordless grease guns eliminate these issues by providing a steady, high-pressure flow at the push of a button. They are especially valuable on farms where equipment is spread across large areas and access to compressed air is limited.

Modern cordless grease guns also feature variable speed triggers, digital pressure gauges, and automatic shut-off to prevent over-greasing. Battery compatibility with existing tool systems, such as Milwaukee's M12 and M18 platforms, means you can share batteries across multiple tools, reducing overall investment. For heavy-duty applications, a high-volume grease gun with a long hose and rigid extension makes reaching tight fittings much easier.

• Always check the maximum working pressure of the grease gun against the requirements of your equipment's fittings. Most heavy machinery requires 5,000 to 10,000 psi for effective lubrication.

1. Milwaukee M12 12-Volt Lithium-Ion Cordless Grease Gun – Best for Portability and Precision

The Milwaukee M12 Cordless Grease Gun is a compact, lightweight solution ideal for farm and construction maintenance. It delivers up to 10,000 psi of pressure and a flow rate of 0.15 pounds per minute, making it suitable for most medium-duty applications. Its variable speed trigger allows precise control, reducing the risk of blowing out seals. The included M12 CP High Output 2.5 Ah battery provides enough runtime for a full day of greasing on a single charge.

This grease gun features a 4-foot hose and a rigid extension for hard-to-reach fittings. The LED fuel gauge on the battery helps you monitor remaining power. At just over 8 pounds, it is easy to carry around the farm or jobsite. For those who need a reliable, everyday grease gun without the bulk of larger models, this is an excellent choice. It pairs well with other M12 tools, such as the M12 12 Volt Lithium Ion Cordless Cable Stapler, for electrical and maintenance tasks.

2. Milwaukee M18 FUEL 18-Volt Lithium-Ion Brushless Cordless Grease Gun – Best for Heavy-Duty Applications

When maximum power and runtime are required, the M18 FUEL Cordless Grease Gun is the top contender. It generates up to 14,000 psi and a flow rate of 0.18 pounds per minute, capable of handling the toughest grease fittings on large excavators, tractors, and industrial machinery. The brushless motor delivers greater efficiency and longer tool life, while the dual-speed control allows you to switch between high-volume and high-pressure modes.

This model features a 4.5-foot hose with a swivel coupler for easy maneuvering, and a built-in pressure gauge to monitor output. It is compatible with all M18 batteries, including high-capacity options like the 12.0 Ah battery for extended runtime. For farm operations with multiple pieces of heavy equipment, this grease gun can significantly reduce maintenance time. It is also a great companion to the M18 FUEL 18V Lithium-Ion Brushless Cordless 12 in. Dual Bevel Sliding Compound Miter Saw for fabrication and repair tasks.

3. DeWalt 20V MAX Cordless Grease Gun – Reliable Alternative with High Flow Rate

The DeWalt 20V MAX Cordless Grease Gun offers a maximum pressure of 10,000 psi and a flow rate of 0.17 pounds per minute. It features a variable speed trigger and a 4.5-foot hose with a rigid extension. The dual LED lights illuminate dark work areas, which is helpful when greasing equipment in tight engine compartments or under machinery. The battery gauge on the tool helps you plan recharges.

This model is slightly heavier than the Milwaukee M12 but provides more power for heavy greasing tasks. It is a solid choice for those already invested in the DeWalt 20V platform. However, for users who prioritize compact size and integration with a broader tool ecosystem, the Milwaukee M12 remains a more versatile option for farm and jobsite maintenance.

4. Lincoln 12V Cordless Grease Gun – Best for Industrial and Fleet Maintenance

Lincoln is a trusted name in lubrication equipment, and their 12V cordless grease gun delivers professional-grade performance. It produces up to 10,000 psi with a flow rate of 0.13 pounds per minute. The tool includes a 4-foot hose, a 3-way coupler, and a built-in pressure gauge. Its ergonomic handle reduces user fatigue during extended use.

This grease gun is ideal for fleet maintenance shops and industrial settings where reliability is critical. It uses a proprietary 12V battery system, which may be a drawback if you already own tools from other brands. For farm use, the Milwaukee M12 or M18 options offer better battery compatibility and similar performance at a competitive price.

5. Makita 18V LXT Cordless Grease Gun – Compact and Lightweight for Tight Spaces

Makita's 18V LXT Cordless Grease Gun is a compact tool that delivers up to 10,000 psi and a flow rate of 0.13 pounds per minute. It features a variable speed trigger, a 4-foot hose, and a flexible extension for accessing difficult fittings. The built-in LED light and battery gauge add convenience. At under 7 pounds, it is one of the lightest options in its class.

This model is best suited for light to medium-duty greasing tasks on smaller farm equipment or automotive applications. While it lacks the high-pressure output of the Milwaukee M18 FUEL, its compact size makes it easy to maneuver in tight spaces. For heavy equipment maintenance, the Milwaukee M18 FUEL remains the more powerful choice.

Comparison Table: Top Cordless Grease Guns at a Glance

The table below summarizes the key specifications of the top cordless grease guns reviewed above. Use it to compare pressure, flow rate, battery platform, and weight to find the best fit for your maintenance needs.

• Model | Max Pressure (psi) | Flow Rate (lb/min) | Battery Platform | Weight (lbs)
• Milwaukee M12 Cordless Grease Gun | 10,000 | 0.15 | M12 | 8.2
• Milwaukee M18 FUEL Cordless Grease Gun | 14,000 | 0.18 | M18 | 10.5
• DeWalt 20V MAX Cordless Grease Gun | 10,000 | 0.17 | 20V MAX | 9.8
• Lincoln 12V Cordless Grease Gun | 10,000 | 0.13 | Proprietary 12V | 9.5
• Makita 18V LXT Cordless Grease Gun | 10,000 | 0.13 | 18V LXT | 6.8

How to Choose the Right Cordless Grease Gun for Your Farm or Jobsite

When selecting a cordless grease gun, consider the type and size of equipment you maintain. For heavy machinery like excavators and tractors, a high-pressure model like the Milwaukee M18 FUEL is essential. For smaller farm equipment or occasional use, the Milwaukee M12 offers excellent portability and sufficient power. Battery compatibility with your existing tool system is another key factor—sticking with one platform reduces costs and simplifies charging.

Also look for features such as a variable speed trigger for precise control, a pressure gauge to avoid over-greasing, and a long hose with a swivel coupler for reaching tight fittings. A rigid extension is helpful for greasing pins and bushings on heavy equipment. Finally, consider the warranty and availability of replacement parts, especially if you rely on the tool for daily maintenance.

Investing in a high-quality cordless grease gun will save you time, reduce physical strain, and keep your heavy equipment and farm machinery operating at peak performance. For a reliable, portable solution that works seamlessly with other tools, the M12 12-Volt Lithium-Ion Cordless Grease Gun is an excellent choice. Explore its features and see how it can streamline your maintenance routine.