Review: Bosch GEX 18V 125 Cordless Sander

So far so good with the new cordless 18 volt, 125mm Bosch random orbit sander we were sent to test. The last word, after a couple of months' use, will appear as a review in Wood Review magazine issue 112, out end August 2021. Reviewed by Raf Nathan. Learn more about Australian Wood Review magazine at www.woodreview....

[@hassanal-mosawi4235]

Thanks for sharing that!

[@boardstopia]

Have you used this with an older/cheaper battery, a non pro core one?
I only have the standard 18v batteries 4ah, will it still work great?

[@MiTheMer]

With Bosch tools, only the "Biturbo" marked ones require the ProCore battery for full power. The grinder isn't a biturbo and should work the same with the older batteries. Even with the 2Ah one, I'd say.

[@Eyehearttravels]

How easy it it getting the replacement disc/pad ?

[@redtapemusic]

It is NOT a 4 Amp battery. The battery is labelled "4All" as its used with lots of other Bosch cordless appliances. It is actually rated at 18 Volts, 1.5Ah

[@dalerobinsuk]

It is a 4A battery, this is the Bosch Professional range, not the Bosch Green (DIY) range.

[@redtapemusic]

@@dalerobinsuk hello Dale. Batteries are not rated solely in current delivery capability as it is meaningless without an Hour rating, (hence the A/h measurement).
You could potentially get 4 Amps out of a PP3 if you shorted it…..briefly, but I wouldn’t recommend trying it.

[@dalerobinsuk]

@@redtapemusic The battery in this video is 4Ah. People use the term Amp as it's easier to say or they don't need to understand the science behind it.

[@MiTheMer]

@@redtapemusic Fear you are talking pretty much nonsense... Ampere is not the same as Ah, which refers to ampere per hour! If you short circuit it, you far over 50A. No joke, hence how some of Bosch' biturbo devices are delivering 1000W and more.

[@redtapemusic]

@@MiTheMer I think if you read my post carefully that’s exactly what I’m saying! In theory 4A/h battery can deliver 4 amps for an hour or 40 amps for 6 minutes. In practice the thermal impact of delivering 40 amps will compromise the battery in a various ways, and this is therefore not a simple linear relationship. Any battery has an internal resistance that will limit it’s maximum current capability.