'Brushless' cordless angle grinder





- 'PWRASSIST™': The USB adapter enables charging of mobile devices on the go
- Automatic 'PWRJUMP™': Charges from 0% to 15% in the first 5 minutes (4.0Ah battery / 100% in 50 min.)
- Digital brushless motor: More power, more efficiency and 10x longer lifetime
- Side handle with 'VRS+': A unique and superior vibration reduction system
- Soft start for gradual run-up to maximum speed without kickback
- Overload protection protects the motor
- When attaching a battery with the switch in on-position, restart protection ensures that the tool does not start automatically
- Three side handle positions for optimal grip in all applications
- Safety guard with 'Clic' system can be adjusted to every working situation in seconds
- Spindle lock for easy accessory change
- Lithium-Ion technology: no memory effect, no self-discharge and always ready for use
- Anti-slip soft grip for more user comfort

KEEPCOOL™
Our patented ‘KEEPCOOL™’ technology prevents batteries from overheating and improves battery performance.
Discover KEEPCOOL™ACTIVCELL™
Our intelligent ACTIVCELL™ technology continuously monitors the voltage, temperature and current of the battery. Transmitting this information to the tool in real-time, it helps extract the right amount of energy from the battery for the job.
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Digital Brushless Motors
The latest cutting-edge technology is embedded in the very DNA of each and every SKIL tool. Our compact, digital brushless motors deliver extra power, extra efficiency and a longer lifetime than comparable brushed motors.
Discover Digital Brushless MotorsPWRASSIST™
There’s no need to restrict your SKIL batteries to the use of SKIL power tools. Our PWRASSIST™ battery and PWRASSIST™ USB adapter allow you to charge phones and tablets on the go.
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PWRJUMP™
Less charging time for batteries means less downtime. Get your SKIL 20V Max PWRCORE 20™ Lithium-ion batteries powered up fast to get back to the job in a flash.
Discover PWRJUMP™

PWRCORE 20™ SERIOUS POWER AND PERFORMANCE.
PWRCORE 20™ is the perfect choice for bigger projects. The serious power and performance allow you to complete every task at hand with ease.
Product Description
‘XP’ brushless cordless angle grinder with ‘VRS+’ side handle
The ‘20V Max’ SKIL 3930 is a powerful cordless angle grinder and part of the SKIL ‘brushless XP’ range. ‘XP’ tools deliver exceptional performance and durability, thanks to their high specifications and advanced digital brushless motors. Like all other SKIL ‘20V Max’ cordless tools, this model is powered by the industry-leading, advanced ‘PWRCORE 20™’ battery and charger technology. Brushless SKIL 3930 is ideal for fast cuts and effortless grinding with its 125 mm disc. A superb innovation is SKIL’s 'VRS+', a superior vibration reduction system compared to traditional systems. A counterweight that can move in all directions is built in the side handle of this angle grinder. This so-called dynamic absorber reduces vibrations to an absolute minimum. And depending on the task at hand, you can easily adjust the side handle into three comfortable positions. The digital brushless motor delivers more power, more efficiency and a 10x longer lifetime than a comparable brushed motor. This cordless angle grinder has an electronic soft start for a gradual run-up to maximum speed without kickback. The ‘Clic’ system allows you to easily adjust the guard without a key, so you can deflect sparks in any desired direction. The SKIL ‘PWRJUMP™’ charger automatically charges your ‘PWRCORE 20™’ battery from 0% to 15% in the first 5 minutes, so you can get back to the job in a flash. The ‘PWRASSIST™’ USB adapter enables charging of mobile devices on the go. The SKIL 3930 DB is supplied in a carrying bag with a 4.0Ah ‘KEEPCOOL™’ battery, a very fast 'Auto PWRJUMP™' 6.0A charger, a ‘PWRASSIST™’ USB charging adapter, one grinding disc and a ‘VRS+’ side handle.
‘PWRCORE 20™’ industry-leading battery technology to power all SKIL '20V Max' tools
The ‘PWRCORE 20™’ system consists of industry-leading advanced battery and charger technology, plus innovative features you won’t find anywhere else, such as our patented ‘KEEPCOOL™’ battery cooling technology which increases the runtime by up to 25% and doubles the battery lifetime. Whereas the patented ‘ACTIVCELL™’ technology safeguards a maximum performance and optimal battery protection. The ‘PWRCORE 20™’ batteries and chargers are 100% compatible and interchangeable with all SKIL ‘PWRCORE 20™’ power tools and garden tools for ultimate flexibility.
Specifications
| Performance Level | EXCEPTIONAL PERFORMANCE |
|---|---|
| Battery capacity | 4.0 Ah |
| Charging time | 0.83 h |
| Voltage/frequency (charger) | 220-240V/50-60Hz |
| Battery type | Lithium-Ion |
| No Load Speed (rpm) | 8500 |
| Voltage Max | 20 V Max |
| Charge current | 6 A |
| Number of batteries | 1 |
| Net weight excl. battery | 1.88 kg |
| Max. disk Ø | 125 mm |
| Spindle thread | M14 |
| Power Platform | PWRCORE20 |
| Brushless | Yes |
| EAN | 4894863200495 |
| Power source | Direct Current |
| Arbor Diameter | 22 mm |
| Sound pressure | 81.5 dB |
| Uncertainty noise power (K) | 3 dB |
| Uncertainty Vibration (K) | 1.5 m/s² |
| Sound power | 92.5 dB |
| Vibration level (surface grinding) | 3.9 m/s² |
Packaging contains
- SKIL 3930 brushless cordless angle grinder
- 'PWRCORE 20™' 4.0Ah Li-ion battery (3104)
- 'Auto PWRJUMP™' 6.0A charger (3123)
- 'PWRASSIST™' cordless USB charging adapter (3162)
- Carrying bag
- Safety guard
- Grinding disc
- 'VRS+' side handle
- Accessory key
- Instruction manual
Available documents for this tool

































