When grease fittings are hard to reach and machines demand consistent lubrication, a reliable grease gun becomes indispensable. Among cordless options, Milwaukee’s M18 2‑Speed Grease Gun stands out. Boasting a formidable 10,000 psi operating pressure, a patent-pending pre-set grease counter, and full compatibility with the M18 REDLITHIUM battery platform, this tool has become a go-to for both pros and serious DIYers. This guide explores why the Milwaukee grease gun is trending, how it outperforms rivals, and tips for maximizing its lifespan.
The milwaukee grease gun delivers up to 10,000 psi—among the highest in cordless models—ensuring it can penetrate tight or corroded fittings with ease . Under its two-speed switch, users can toggle between high-flow (up to 10 oz/min) and high-pressure modes for versatile maintenance needs .
Equipped with a pre-set grease counter, it lets you select exact volumes per cycle—critical for machinery with strict OEM lubrication specs . No more guesswork or overloading—just mechanical precision.
As part of the M18 REDLITHIUM system with 200+ tools, this grease gun shares batteries across your toolbox—eliminating dedicated batteries and chargers .
The tool features a 48″ flexible hose for tight or deep fittings, LED worklight, lock-on/lock-off trigger, air-bleeder for fast priming, and a shoulder-strap-ready base stand—all enhancing efficiency and reducing fatigue .
• Limited by hand force—struggle over 3,000–5,000 psi; Milwaukee tops out at 10,000 psi swiftly.
• Time-consuming, clumsy in tight spots, and messy—cordless model is cleaner, faster, and more ergonomic.
• Require hoses/compressors—tie you to central equipment, less portable.
• Hard to control exact volume.
• Milwaukee offers cordless convenience and precise preset metering—no compressor needed.
Heavy-equipment technicians who need reliable, high-pressure outputs.
Automotive shops with multiple grease points (chassis, joints, bearings).
Farmers & agricultural mechanics, especially with tractors and harvesters requiring regular lubrication.
Serious DIYers maintaining ATVs, lawn tractors, and machinery.
It’s overkill for occasional use or low-volume tasks—manual grease guns may suffice there.
A review from Home Depot highlights its "industry-leading 10,000 psi" and features like grease counter, LED, and 48" hose.
Toolup rates it 4.7/5 from 246 users, citing its “best‑in‑class” pressure and ergonomics .
Walmart and Amazon customers consistently mention:
"Quick, powerful, no muss/no mess."
“LED works in dim bays, and the pre-set counter saves time.”
Average ratings hover around 4.6–5.0—very high satisfaction.
Use M18 batteries: Higher-capacity REDLITHIUM packs deliver up to 10 cartridges per charge .
Bleed the air: Use air-bleeder valve before operation for consistent priming.
Clean hose/coupler: Prevent debris buildup at fittings.
Empty barrel when storing: Prevent hardened grease and pressure lock.
Use recommended grease cartridges: Align with tool design; verify NLGI grade compatibility (NLGI 1–3 usually OK) .
Bare tool (2646‑20): Good if you already own M18 batteries. Price ~US $220–$230 .
Kit (2646‑21CT / 22CT): Includes battery(s) + charger; ranges from C$478 (Canada) up to US $440 for US kit bundles .
Choose based on your existing M18 inventory and battery needs.
Feature
Milwaukee M18 2-Speed
Competitor A
Competitor B
Max Pressure
10,000 psi
~8,000 psi
~6,500 psi
Flow Rate
10 oz/min
8 oz/min
7 oz/min
Pre-set Grease Counter
✅
❌
❌
Battery Platform
M18 REDLITHIUM
20V Lithium Ion
12V Lithium Ion
Flexible Hose
48 in
36 in
Rigid tube
LED Light, Trigger Lock
✅
✅
✅
Price (bare)
~$220–230
~$150–180
~$120–150
Milwaukee leads on power, precision, and battery ecosystem—making it a top-tier choice, justifying the price premium.
Searches for “Milwaukee grease gun” peak in spring & fall during maintenance seasons.
Long-tail keywords trending: “Milwaukee M18 grease gun review”, “Milwaukee grease gun kit”, and “Milwaukee 10,000 psi grease gun”.
Google’s latest E-E-A-T emphasizes authoritative, richly referenced content—this article supports that with product specs, citations, FAQs, and pros/cons.
For professionals and dedicated DIYers alike, the Milwaukee M18 2‑Speed Grease Gun delivers unmatched combination of power, precision, and convenience. High-pressure output, pre-set counter, and seamless integration with the REDLITHIUM ecosystem make it arguably the best all-round cordless grease gun on the market. While it commands a premium, users repeatedly highlight its reliability, clean operation, and jobsite efficiency—earning top marks and strong word-of-mouth.
Q 1: What is the difference between the bare tool and kit versions?
The bare model (2646‑20) requires you to supply your own M18 battery and charger. Kit versions (2646‑21CT/22CT) include batteries (usually 1.5 Ah or 6.0 Ah) and a charger—ideal for those building from scratch .
Q 2: How many grease cartridges can one battery charge handle?
A high-capacity REDLITHIUM battery can power up to 10 standard grease cartridges per charge The Home Depot+1Walmart.com+1.
Q 3: Can I use NLGI grade 3 grease?
Yes, most retailers confirm compatibility with NLGI 1–3 greases, including heavier grades like NLGI 3 The Home DepotMilwaukee Tool.
Q 4: Is the grease gun difficult to maintain?
It’s minimal—clean the coupler and hose, bleed air before storage, and clear remaining grease after each use. Milwaukee’s design supports ease of maintenance.
Q 5: Why is a pre-set grease counter important?
It ensures precise, consistent lubrication—ideal for machinery needing exact lubrication volumes. No over-greasing, and better alignment with service intervals.
Q 6: Is Milwaukee the only brand with this feature?
Other brands offer cordless models, but few match Milwaukee’s 10,000 psi, two-speed design, and built-in counter. This combo sets a high standard.
Q 7: Is 48″ hose really better?
Yes—particularly for reaching distant zerk fittings without awkward stretching. It prevents strain and keeps access easy, according to users.
Q 8: What warranty coverage does it come with?
Milwaukee backs the tool with a 5‑year limited warranty, in line with their typical coverage on M18 tools .