FLEX FX3171A-Z Grinder Review
Our verdict
The FLEX FX3171A-Z runs on a 24V battery platform at 10000 RPM and earns a 4.7-star rating from 124 reviews, though zero recorded purchases last month signals it is still building a buyer base. At $175.99 for the bare tool, it targets users already invested in the FLEX 24V ecosystem.
Check price on AmazonBest for
FLEX 24V platform users who want a high-RPM cordless grinder at a higher voltage tier than standard 18V tools
Skip if
You are new to FLEX tools and not ready to invest in the 24V battery system, or you need strong monthly sales data before committing to a newer platform
- Power Source Battery Powered
- Voltage 24 Volts
- Speed 10000 RPM
- Weight 5.8 Pounds
- Priced 79% above the category median ($98.50 across 92 tracked models)
Our scorecard
-
Owner rating4.7/5
4.7 average across 124 owner ratings
-
Popularity1.0/5
124 owner reviews, fewer than most models here
The overall score is owner satisfaction weighted by how many reviews back it, so a high rating from few reviews counts for less. The bars below show where this model stands against the other power tools and workshop machinery we track in this category on price, popularity and size. Context, not marks against it, and our read of the data, not a lab test.
Overview
The FLEX FX3171A-Z spins at 10000 RPM powered by a 24V battery, placing it at a higher voltage tier than the 18V grinders in this batch. The 4.7-star rating across 124 reviews is respectable for a newer platform entry, though the absence of recorded monthly purchases in the current data window suggests slow organic pickup.
At 5.8 pounds, the FX3171A-Z is among the heavier cordless grinders in this batch. The $175.99 bare-tool price is among the higher cordless options here, which means the total investment including a 24V battery and charger is a significant commitment to the FLEX platform.
For tradespeople already running FLEX tools, the FX3171A-Z adds a capable grinder to the lineup. For buyers starting fresh, the limited monthly demand data and smaller review pool warrant comparison against Milwaukee's heavily verified alternatives before deciding.
Pros
- 24V platform delivers higher voltage than most cordless grinders in this category
- 10000 RPM, a solid speed for cutting and grinding
- 4.7-star rating from 124 reviews
- 5.8-pound build suggests solid, durable construction
Cons
- Zero purchases recorded last month, low current market momentum
- Bare tool only at $175.99, full setup cost is high for new FLEX buyers
- Smaller review base than Milwaukee alternatives in this batch
Specifications
| Power Source | Battery Powered |
|---|---|
| Voltage | 24 Volts |
| Speed | 10000 RPM |
| Weight | 5.8 Pounds |
Performance notes
The FX3171A-Z operates at 24V with a 10000 RPM top speed. The 5.8-pound body is on the heavier end for a cordless grinder, which may contribute to fatigue during extended overhead or vertical grinding sessions. Platform compatibility is limited to FLEX 24V batteries.
What buyers say
Owners who reviewed the FX3171A-Z rate it at 4.7 stars and note positive performance from the 24V motor. The low purchase volume suggests it has not yet reached the mainstream adoption of Milwaukee options, but early buyers are broadly satisfied based on the review score.
Similar power tools and workshop machinery to consider
Frequently asked questions
Does the FLEX FX3171A-Z come with a battery?
The FX3171A-Z is listed as a bare tool. A FLEX 24V battery and charger must be purchased separately.
How does 24V compare to 18V for angle grinding?
A higher nominal voltage can support more sustained power output and runtime, though real performance also depends on battery cell quality and motor design. The FX3171A-Z delivers 10000 RPM from its 24V platform.
Questions about the FLEX FX3171A-Z?
Contact ToolGalaxy at hello@toolgalaxy.com for help with your decision.