I was out at Milwaukee’s headquarters in June for the annual Pipeline event, and there was a heck for a lot happening. More to the point, there was an enormous amount to see – a testament to just how busy their teams have been. Among the many tools in the Milwaukee fleet is the M18 Fuel 4.5- to 6-inch Braking Grinder (3670).
Especially for you safety fanatics, this model might be the one you’ve been looking for.
Milwaukee M18 Fuel Braking Grinder Performance
If you’re new to grinders, you might be wondering how a standard model differs from a braking variant. It’s mainly a matter of safety.
Simply put, when something goes wrong, such as kickback, the tool automatically shuts off (hence “braking”). A unit like Milwaukee’s braking grinder has a lot of torque. So, if it grabs the material (or becomes stuck), it can fly out of your hands, injuring you or someone else.
Having an automatic shutoff feature like the 3670-20’s can help prevent that.
Specs
- Model: Milwaukee 3670
- Battery: 18V (6.0Ah)
- Brushless motor
- Max speed: 9,000 RPM
- Braking time: Under 3 sec
- Wheel diameter: 4.5 to 6 in
- Weight: 4.5 lbs
Driving this unit is an 18V (6.0Ah) battery and the brand’s Powerstate brushless motor. Milwaukee built the latter specifically for this tool and says that it delivers performance equivalent to a 13-amp grinder. Moreover, you can expect max operating speeds of 9,000 RPM.
Should something go awry, Milwaukee tells us that the grinder’s braking feature will stop all accessories in under three seconds. The stop times by attachment are: 1.5 seconds with a cutting disc; 2 seconds with a flap disc; and 2 seconds with a grinding disc.
Milwaukee M18 Fuel 3670-20 Design
The 3670-20 has several design facets worth mentioning.
For one, the paddle switch features a no-lock design. This will boost comfort and make the tool easier to use in awkward positions. And speaking of ease, you also have the added convenience of toolless accessory changes.
Furthermore, Milwaukee kept durability in mind, giving the M18 Fuel braking grinder a metal housing and gearing.
Milwaukee M18 Fuel Braking Grinder Price
This braking grinder retails as a bare tool for $249, and a kit (3672-22) for $549. The kit comes with two M18 Red Lithium Forge XC8.0 batteries, a rapid charger, and a storage bag.
