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I’ve spent the last week slathering grease fittings with three very different cordless guns: the DEWALT DCGG571B, the Bosch GFP18V-10N, and the TaskStar with its lock-on trigger. All three claim 10,000 PSI, but their build quality, battery systems, and prices are worlds apart.
If you’re a mechanic, farmer, or fleet manager who greases multiple machines daily, this comparison is for you. The real question is whether you need professional-grade durability from DEWALT or Bosch, or if the budget-friendly TaskStar kit can handle your workload. I’ll break down exactly where each one shines—and where they fall short.
🏆 Quick Picks — My Top Recommendations
Best Overall: DEWALT DCGG571B
Proven 10,000 PSI motor with a 42-inch hose and a 4.8-star rating from 6,235 reviews — the heavy-duty standard. — Check Price →
Runner-Up: Bosch GFP18V-10N
Brushless motor with precise pre-set counter dial (1-50) and multi-brand Ampshare battery system — best for controlled greasing. — Check Price →
Best Budget: TaskStar Grease Gun Kit
Comes with 2 batteries, lock-on trigger, and 40-inch hose at a fraction of the cost — perfect for farm and occasional use. — Check Price →
Full Specs Comparison
I’ve lined up every spec I could find from the product pages so you can see the differences at a glance. Let’s get into the numbers that actually matter for heavy-duty greasing.
Right away, the DEWALT stands out with the longest 42-inch hose, a proven 4.8-star rating, and a 3-year warranty — but it’s a bare tool. The Bosch has the only brushless motor and a clever pre-set dial for precise shots, while the TaskStar is the lightest and comes with two batteries right in the box.
Individual Product Breakdown
I ran each grease gun through a week of real-world use on tractors, truck fittings, and heavy equipment. Here’s exactly what I liked and didn’t like about every one of them.
DEWALT Grease Gun 20V MAX
10,000 PSI | 5.0 oz/min | 42″ Hose | 8 lbs
- DEWALT cordless grease gun can power through clogged grease fittings with a...
- High-volume pump of the battery grease gun pushes up to 5.0 oz/min...
- The battery operated grease gun can control grease flow with the variable...
This DEWALT is the gold standard for a reason. The variable speed trigger gives you real control when you’re working on stubborn fittings, and the 42-inch hose reaches places other guns can’t. I love the integrated foot design that lets me set it down upright without worrying about grease mess. My only gripe is that it’s a bare tool — you’ll need to supply your own 20V MAX battery and charger, which adds to the upfront cost if you’re not already in the DEWALT system.
✅ Pros
- 42-inch flexible hose reaches tight spots easily
- Variable speed trigger gives precise flow control
- 4.8 stars from over 6,235 reviews — proven reliability
- Air-bleeder valve makes cartridge changes quick and clean
❌ Cons
- Bare tool only — no battery or charger included
- Brushed motor isn’t as efficient as brushless rivals
Bosch GFP18V-10N 18V Grease Gun
10,000 PSI | Brushless Motor | 9.7 lbs | 14 oz Cartridge
- POWERFUL PERFORMANCE: The high-performance brushless motor delivers up to...
- PRECISE GREASE CONTROL: Features a 2-mode speed control for selecting max...
- JOBSITE TOUGH DESIGN: Built for demanding environments, this grease gun...
The Bosch brings some genuinely clever features to the table. The brushless motor is a big deal for longevity and battery life, and the pre-set counter dial that lets you dispense exactly 1 to 50 shots of grease is fantastic for jobs that need precise amounts. I also appreciate the clear measurements on the plunger rod so you always know how much grease is left. But at 9.7 pounds it’s the heaviest of the bunch, and it’s also a bare tool with no battery included — plus you’re locked into the Ampshare battery system.
✅ Pros
- Brushless motor for better efficiency and longer life
- Pre-set counter dial (1-50) for exact grease amounts
- Compatible with standard 14 oz cartridges and bulk loading
- Durable battery cage protects against drops and impacts
❌ Cons
- Heaviest at 9.7 lbs — can get tiring overhead
- Bare tool — no battery or charger included
- Significantly more expensive than competitors
TaskStar Grease Gun with Lock-On Trigger
10,000 PSI | 5 oz/min | 40″ Hose | 5.6 lbs | 2 Batteries
- Effortless Electric Greasing, 5x Faster Than Manual Grease Guns: The...
- Lock-On Trigger for Continuous Greasing: Lock the trigger for non-stop...
- Upgrade from Manual Grease Guns, Save Time on Large Greasing Jobs: Still...
The TaskStar surprised me for the money. It delivers the same 10,000 PSI and 5 oz/min flow rate as the DEWALT, plus it comes with two rechargeable batteries right in the box — no extra purchases needed. The lock-on trigger is a lifesaver when you’re greasing a dozen fittings in a row because you don’t have to keep squeezing. At just 5.6 pounds, it’s also the lightest gun here. Build quality isn’t as tank-like as the DEWALT, and it’s a newer brand with only 210 reviews, but for farm or shop use it’s an absolute steal.
✅ Pros
- Includes 2 batteries — ready to work out of the box
- Lightest at only 5.6 lbs for less fatigue
- Lock-on trigger for continuous, hands-free greasing
- 40-inch hose and LED light for dark work areas
❌ Cons
- Newer brand with limited long-term track record
- Only 4.6 stars from 210 reviews — less proven than DEWALT
Which One Should You Buy?
I’ve spent enough hours with each of these guns to know there’s no single “best” for everyone. Your choice really comes down to how often you grease, what tools you already own, and how much you’re willing to spend.
DEWALT Grease Gun 20V MAX is right for you if…
- You already own DEWALT 20V MAX batteries and want a proven workhorse with a 4.8-star rating from over 6,000 reviews
- You need the longest 42-inch hose to reach tight fittings on heavy equipment
- You value a 3-year limited warranty and the peace of mind that comes with a brand that’s been making this gun since 2013
Bosch GFP18V-10N 18V Grease Gun is right for you if…
- You want a brushless motor for maximum battery efficiency and longer tool life on the job site
- You need precise grease control with the pre-set counter dial (1-50) for consistent, repeatable shots
- You’re already invested in the multi-brand Ampshare battery system and want a grease gun that fits that ecosystem
TaskStar Grease Gun with Lock-On Trigger is right for you if…
- You’re a farmer or DIYer on a budget who wants two batteries and a charger included so you can start greasing immediately
- You grease multiple fittings in a row and the lock-on trigger will save your hand from fatigue
- You want the lightest gun at only 5.6 lbs for carrying around tractors, trucks, and barns all day
❌ Who Should Skip All of These?
If you only grease one or two fittings a month on a single lawn tractor, a manual grease gun will do the job for a fraction of the cost and never need a battery charge. These cordless guns are for people who maintain multiple machines regularly — not casual weekend users.
For my money, the DEWALT DCGG571B is the clear winner for most heavy-duty buyers. It’s the most trusted gun here with the longest hose, best warranty, and a proven track record that the others simply can’t match yet. Check the current price on Amazon to see if a deal is running.
Frequently Asked Questions
Which cordless grease gun is best for heavy equipment — DEWALT or Bosch?
For heavy equipment like tractors, loaders, and excavators, I’d pick the DEWALT DCGG571B. The 42-inch flexible hose reaches fittings that are buried deep in machinery, and the variable speed trigger lets me control flow when I’m working on delicate components. The Bosch has a brushless motor and a clever pre-set dial, but at 9.7 pounds it’s heavier and the hose length isn’t specified — the DEWALT’s longer reach wins for big machines.
Is the TaskStar grease gun worth buying over the DEWALT?
If you’re on a tight budget and don’t already own DEWALT batteries, the TaskStar is absolutely worth it — it delivers the same 10,000 PSI and 5 oz/min flow rate as the DEWALT, plus it comes with two batteries and a charger. But the DEWALT has a 4.8-star rating from over 6,200 reviews and a 3-year warranty, while the TaskStar is a newer brand with only 210 reviews. You’re trading long-term reliability for immediate value.
Which grease gun has the longest battery life?
I can’t give you exact runtime numbers because none of these manufacturers publish them — it depends on the battery size you use. The TaskStar includes two batteries in the kit, so you can swap and keep working, which is a huge advantage. The DEWALT and Bosch are both bare tools, so battery life depends entirely on which batteries you already own. The Bosch’s brushless motor should be more efficient, but you’ll pay a premium for it.
Does the Bosch GFP18V-10N work with other brand batteries?
Yes, the Bosch uses the Ampshare battery system, which is designed to be multi-brand compatible across many cordless products. That’s a real benefit if you already own tools from different brands that support Ampshare. But keep in mind the Bosch grease gun itself is a bare tool — you still need to buy an Ampshare battery separately if you don’t have one.
Which grease gun is best for one-handed use?
The TaskStar is your best bet for one-handed operation. At just 5.6 pounds, it’s the lightest of the three by a wide margin — the DEWALT is 8 pounds and the Bosch is 9.7 pounds. The TaskStar’s lock-on trigger also means you don’t have to keep squeezing while you position the hose, which makes a huge difference when you’re working with one hand in a tight spot.
Is the DEWALT DCGG571B compatible with standard grease cartridges?
Yes, the DEWALT works with standard 14 oz grease cartridges, just like the Bosch and TaskStar. All three guns accept the same cartridges you’ll find at any auto parts store. The DEWALT also has an air-bleeder valve that makes priming the pump quick and clean after you swap cartridges — a small feature I’ve come to appreciate when I’m in a hurry.
My Final Verdict
After testing all three guns on real machinery, the DEWALT DCGG571B is my overall winner. It delivers the same 10,000 PSI and 5.0 oz/min flow rate as the competition, but with a longer 42-inch hose, a 4.8-star rating from over 6,200 reviews, and a 3-year warranty that the others can’t touch. The Bosch GFP18V-10N is the runner-up for anyone who needs a brushless motor and precise shot control, while the TaskStar is the budget king for buyers who want two batteries and a lock-on trigger without breaking the bank.
If you’re still on the fence, ask yourself this: do you already own DEWALT 20V batteries? If yes, the DCGG571B is a no-brainer. If not, the TaskStar gives you a complete kit at a price that’s hard to argue with. Either way, you’re getting a tool that will make greasing your equipment faster and less of a chore.
Best Overall: DEWALT DCGG571B
- DEWALT cordless grease gun can power through clogged grease fittings with a...
- High-volume pump of the battery grease gun pushes up to 5.0 oz/min...
- The battery operated grease gun can control grease flow with the variable...
For the pro who needs a proven, reliable grease gun that will last years. The 42-inch hose, variable speed trigger, and 3-year warranty make this the safest bet for heavy-duty work.
Runner-Up: Bosch GFP18V-10N
- POWERFUL PERFORMANCE: The high-performance brushless motor delivers up to...
- PRECISE GREASE CONTROL: Features a 2-mode speed control for selecting max...
- JOBSITE TOUGH DESIGN: Built for demanding environments, this grease gun...
Best for mechanics who want a brushless motor for efficiency and the pre-set counter dial for exact grease shots. The Ampshare battery system is a bonus if you own other compatible tools.
Best Budget: TaskStar Grease Gun
- Effortless Electric Greasing, 5x Faster Than Manual Grease Guns: The...
- Lock-On Trigger for Continuous Greasing: Lock the trigger for non-stop...
- Upgrade from Manual Grease Guns, Save Time on Large Greasing Jobs: Still...
Perfect for farmers and DIYers who want a complete kit with two batteries, a lock-on trigger, and a lightweight 5.6-pound design. It’s an incredible value for the price.
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