2684 random orbital polisher arrived yesterday, put it to work this morning on some oxidized headlights. Dimensionally, it’s almost identical to my Mac, and with 5.0 AH batteries each one weighs just shy of 7 pounds. In use, the Milwaukee is MUCH quieter than the Mac, and vibration is also much less on the Milwaukee. I measured the sound level at 3000 RPM using a decibel meter placed about a foot away, and the M18 came in at 87.4dBA, and the Mac at 96.1 dBA - quite a difference,.
In the past I tried to go “small” using a Power Stack battery on the Mac, but the run time just wasn’t usable, it only lasted about 15 minutes if I recall correctly using the (currently) largest available 1.7 AH Power Stack battery. I’ve got a ton of M18 batteries, including a few HO 3.0s, and that’s what I’m going to try using first on this polisher. I’m curious to see how long I can go using the smaller 3.0 HO batteries before they die. Here’s a few comparison pics:


M18 @ 3000 RPM:
Mac @ 3000 RPM: