Question 1

What can the Milwaukee 3670-20 M18 FUEL braking grinder be used for?

Accepted Answer

The Milwaukee 3670-20 is designed for demanding grinding, cutting, metalworking, and fabrication applications. Its 9,000 RPM POWERSTATE™ Brushless Motor delivers performance equivalent to 13A corded power, making it suitable for professional jobsite tasks. The grinder accepts common 4-1/2-inch to 6-inch accessories and includes guards for different cutting and grinding applications.

Question 2

Which Milwaukee batteries are compatible with the 3670-20 grinder?

Accepted Answer

The Milwaukee 3670-20 operates on the M18™ cordless battery system and is compatible with all Milwaukee M18™ battery packs. The product information specifically recommends M18™ REDLITHIUM FORGE™ XC8.0 and HD12.0 batteries for higher power performance. The grinder is sold without a battery, so a compatible M18 battery must be purchased separately for operation.

Question 3

How quickly does the RAPIDSTOP™ brake stop the grinder wheel?

Accepted Answer

The RAPIDSTOP™ braking system is designed to stop most abrasive wheels in under 2 seconds. This rapid braking feature helps reduce the time the wheel continues spinning after the tool is switched off. The grinder also includes an electronic clutch designed to help protect against kickback and provide overload protection during demanding cutting and grinding applications.

Question 4

What accessories fit the Milwaukee 3670-20 M18 FUEL grinder?

Accepted Answer

The Milwaukee 3670-20 features a 5/8-11 spindle, making it compatible with common grinding and cutting accessories that use this spindle configuration. The tool includes a T27 guard, T1 clip-on guard, flange nut, back flange, wrench, and anti-vibration side handle. Its 4-1/2-inch to 6-inch capacity supports a range of suitable wheel sizes for professional applications.

Question 5

How does the paddle switch design improve control during grinding?

Accepted Answer

The paddle switch design allows the Milwaukee 3670-20 to be operated comfortably from multiple working positions, helping users maintain control during grinding and cutting tasks. Its streamlined handle grip is designed for improved handling, while the anti-vibration side handle helps reduce user fatigue during extended operation. Together, these features support more comfortable professional use on demanding jobsites.

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