Worx 20V Cordless Rotary Hammer - Wx391
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Product Information
Full details
The Worx 20V Cordless Rotary Hammer Wx391 is designed for DIY enthusiasts and homeowners who need a versatile, compact power tool for masonry, concrete, and standard drilling tasks. Its primary benefit is the 3-in-1 functionality that allows users to switch seamlessly between rotary hammer, drill, and screwdriver modes without needing multiple tools. While it provides excellent mobility and lightweight handling for overhead work, users should note that its 1.2 Joules of impact energy is optimized for light-to-medium duty tasks rather than heavy-duty industrial concrete demolition.
All features
| Model Part Number | Wx391 |
|---|---|
| Brand | Worx |
Extended Product Information
FAQs
Can I use standard drill bits with this tool?
Yes, you can use standard round-shank bits by utilizing the included chuck adapter provided with the tool.
Is this tool suitable for breaking up a concrete driveway?
No, this tool is designed for light-to-medium drilling tasks. It lacks the impact energy required for heavy-duty demolition.
Does this tool come with batteries?
The Wx391 is part of the 20V PowerShare system; please check your specific package contents, as some bundles include the 2.0Ah battery and charger while others are tool-only.
What is the maximum hole size for concrete?
While it varies by material density, this tool is optimized for standard masonry anchors and small-to-medium diameter holes in concrete.
How do I switch between hammer, drill, and driver modes?
Use the selector switch located on the side of the tool housing to toggle between the rotary hammer and drill modes.
Troubleshooting
The tool will not start or has no power.
Verify that the 20V battery is fully charged and securely clicked into the tool housing.
The drill bit is stuck in the chuck.
Ensure the SDS Plus locking collar is fully pulled back while pulling the bit; do not use excessive force.
Tool vibrates excessively.
Check that the bit is properly seated and straight; if the bit is worn or dull, replace it.
Pros and Cons
Pros
- Lightweight and compact for easier overhead handling
- Versatile 3-in-1 operating modes
- Quick bit changes with SDS Plus chuck
- Cross-compatible battery system with other Worx tools
Cons
- Not intended for heavy-duty industrial concrete breaking
- Limited impact energy compared to corded rotary hammers
- Best performance requires the 2.0Ah battery which may limit runtime for large jobs
Setup, Compatibility & Care
To set up your tool, ensure the 20V PowerShare battery is fully charged before first use. To use the tool as a rotary hammer, insert an SDS Plus bit until it clicks; for standard drilling or driving, use the included chuck adapter. Compatibility is limited to SDS Plus bits for masonry and standard round-shank bits for the adapter. For maintenance, keep the ventilation slots clean with a dry brush to prevent overheating, and periodically wipe the exterior with a clean, damp cloth. Always store the battery in a cool, dry place when not in use for extended periods to maintain cell longevity.