BTP Review: Bosch 1250DEVS 6 In. Dual-Mode Random Orbit Sander/Polisher

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This Bosch 6″ ROS is the best sander for your heavy duty sanding jobs.

Review by: cmeyer25

I am writing this review of the Bosch 1250DEVS random orbit sander as it was given to me by Be The Pro and Bosch to try out. I have been looking at getting a random orbit sander for heavy duty sanding work, and this Bosch was exactly what I had been hoping for!

Initial impressions of the Bosch 1250DEVS

The Bosch 1250DEVS random orbit sander is a little larger than I expected.The first thing I noticed about this tool, was the size of the Bosch 1250DEVS. It’s a big sander – about as long as a four inch angle grinder, but the head is much thicker. Otherwise, it handles about the same, with an extra handle that can be screwed into either side of the head for use left or right handed. It balances really nicely, either held by the handles or like a palm sander from directly over the sanding pad. The head has a contoured grip, so it fits nicely into my hand when I want to do smaller pieces or more delicate sanding.

The main reason I had been wanting this particular Bosch 1250DEVS random orbit sander, though, was because I needed something to quickly even out rough lumber, remove saw and router marks from The Bosch 1250DEVS random orbit sander has a Turbo mode for fast sanding of end grain or anywhere I need to be more aggressive.flattened slabs and rounds, and for sanding end grain. This sander has two main settings, one for standard orbital sanding, and on for rapid removal – the aggressive “turbo” mode. It also has a speed dial on the end of the tool right next to the cord to control the pad speed in either mode. It’s really easy to change from one to the other. There’s a switch right above the pad on the left side of the tool, and all you have to do is rotate the switch 180 degrees (while the tools is off) and you’re ready to rip into some material.

Beech was no match for the Bosch 1250DEVS

The Bosch 1250DEVS random orbit sander made fast work of whatever I set it to.My first experience with the Bosch 1250DEVS sander/polisher was the night I took it out of the box. I slapped on the sand paper disc that came in the box and went to work on a beech branch I had shaped and flattened. The trunk portion was still really rough with tool marks but I had it completely smooth in under a minute! And as I was looking at how smooth I had been able to get it, I was confused, because I had assumed that the disc I’d put on it was 60 or 80 grit, but the surface was buttery. So I checked and realized it was 120 and I had blown through all that sanding with a much higher grit that gave me a finished surface in less time than I normally would have spent with a much coarser grit just to get the tool marks out.

The Turbo mode on the Bosch 1250DEVS saves time

That has been my experience over and over again – less time, smoother finish. I bought some sanding discs with different grits to see how the Bosch 1250DEVS would handle with them, but I have mostly been using 120 and 80. I have had a few people remark to me that they were wary of using grits below 100 because, on aggressive mode, the Bosch 1250DEVS has a super strong grip. And I have definitely noticed that if you don’t hold the pad at the correct angle, the sander wants to skip on the workpiece, or spin it out from under you (Especially working on smaller pieces – even working on a non-slip mat. That really helps, but even then sometimes it wants to move. It’s a really strong tool!). But that extra grit and aggressive removal ion the Turbo mode comes in really handy when I want to work through something quickly or am sanding end grain or really coarse wood. I’m not very patient when it comes to sanding, so if I can get it done quicker, that’s what I’m going to do. I love that the sander has a six inch pad – the extra surface area along with a strong motor really speeds up the sanding process but also makes the resulting finish flatter and more even.

Very little vibration on the Bosch 1250DEVS – even after hours of sanding

The Bosch 1250DEVS random orbit sander smoothed out this mountain of plywood.With all the strength and speed this sander has, if it wasn’t a Bosch tool, I would have expected it to vibrate like crazy and make a ton of noise. But I haven’t had to deal with either. The Bosch 1250DEVS random orbit sander hooked up to my dust extractor.I wear hearing protection no matter what I’m doing in my shop, but I still have noticed that the Bosch 1250DEVS isn’t much louder than my five inch Bosch ROS. And it’s so smooth. Especially on its regular sanding mode. I spent a few full afternoons smoothing out a bunch of plywood surfaces for a feature wall I’m building at work, and even after constant sanding for a few hours in a row, my hands and arms were tired, but not tingly or buzzing like I used to get with other sanders I’ve used. I did all of that sanding outside with a dust mask on and no dust collection so there was dust EVERYWHERE! I was lucky that there was a slight breeze, or I’d have probably been completely surrounded by a thick cloud. But when I use it at home in my shop, I hook it up to my shop vac and all that dust that I know is being generated stays out of the air except for the small amount that escapes when I push over the edge of whatever I’m working on.

The Bosch 1250DEVS random orbit sander made quick work even on cylindrical shaped pieces.I sanded a bunch of wood cylinder edges when I was making toy cameras – so I was sanding all curved end grain, and I was really happy with how much control I was able to have over the sanding process and still get through it much quicker than I have in the past only using a ROS or a grinder with a sanding disk. And again, the end result was smooth and even – no swirl marks or gouges.

Final thoughts: The Bosch 1250DEVS is now my best ROS sander

The Bosch 1250DEVS is a beast of a tool, and as sanding is often one of the least loved or appreciated aspects of woodworking, this sander is a must for anyone who needs to be sanding often. It significantly cuts down my time and energy spent sanding, and is a solid, well made tool like we have all come to expect from Bosch. Since getting mine, I’ve hardly picked up my old ROS anymore, and I love that!  I now have to say it is my best ROS sander until they come out with something better.

For more on the Bosch 1250DEVS, including where you can buy it near you, click here.

For more Bosch 1250DEVS reviews by construction pros, click here.

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8 comments on “BTP Review: Bosch 1250DEVS 6 In. Dual-Mode Random Orbit Sander/Polisher

  1. Brian

    Great review, I also have the little 5 inch ROS20VSK and think it’s a great little sander,
    But after reading your review plus another member, this Bosch sander is definitely going on my list of tools to add.
    Nice to hear you are impressed with the dust collection,

  2. Charlie

    Thanks everyone, I’ve been using this sander for everything now – I almost never use my little ROS anymore. The dust collection and rapid material removal make it perfect for just about any task.

  3. Benjamin

    Had my eye on one of these, the reviews always seem highly favorable. Meanwhile I’ve been using the Bosch 5” Palm Grip Random Orbit Sander with my Airsweep attached and great results. Imagine the DEVS is just that much better all around, thanks for your input and well done review.

  4. David

    Thanks for the in depth review. I need to step up my sanding game from a small ROS to something with more surface area. I spend so much time sanding that I might as well get the right tool. Low vibration is key.

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