Aimed at: Pro users who need cordless flexibility to demolish and cut.
Pros: A powerful and flexible cutting friend- just chose the right blades for success.
Too many years ago than I care to remember, I reviewed a recip saw newly arrived from the US. After using it a bit I showed it to some tradesmen, who almost universally dismissed it. They told me it was too heavy and clumsy (no 18v Li ion cordless then!) but look around now on sites and recip saws have been wholeheartedly adopted – especially by window fitters and first and second fix carpenters. This is just because they are VERY useful tools – doing things that others can’t. And now with a variety of blades that will cut timber, steel etc etc they are assured a place in the van.
Many things have changed in the intervening years, like SDS blade fitting, lighter weight and compact versions for use in tight corners. But the real revolution in the last few years are the cordless recip saws with enough punch to do the job. Enter the Flex RS 29 18.0!
This tool is part of the new 18v range from Flex of Germany. It too, takes advantage of the advanced 18v battery system that Flex has launched a few months ago. The system is designed to prevent battery packs from overheating during use and safe from deep discharge, thus ensuring longer battery life and reliability. The diagnostic charger is unique too – the only one I have seen that uses an LED screen to count down the minutes to “fully charged” so that workers can keep track of the battery power available.
Flex tools are aimed at professionals and are generally sold through trade outlets, and it seems that, these days, professional power tools need to be presented in stackable boxes. Accordingly, the saw arrived in a smart black L-Boxx with discreet Flex logo. A custom insert held the tool securely in transit and included in the box were two battery packs, a smart charger and a pack of blades.
I had lined up several jobs to do with the Flex RS 29 – namely cutting up some old uPVC window frames, removing another frame and then a bit of not-so-gentle pruning of a quince tree that is slowly taking over a corner of the garden and annoying the neighbours. These jobs are perfect for a recip saw, especially a cordless one, because they demonstrate how the saw can jump from one job to another by simply changing to a suitable blade.
For some reason recip saws are always heavy. Maybe something to do with the recip mechanism hidden in the nose of the saw, and at around 3.6 Kgs with battery pack, the Flex feels quite chunky. However, because of the nature of recip cutting, you don’t really want something too light because you need the weight to keep the saw stable and in the cut.
The rear part of the saw is in familiar Flex red with a black and red battery pack (2.5 or 5Ah) slotted onto the end of the main handle. A comfortable and well-designed rear handle has enough grippy rubber to be comfortable, and the trigger and interlock are well placed for average hands. Speed is controlled via the trigger and is especially controllable at low and high speeds. (0-3100 rpm) Of course, there is some vibration, as you would expect from a recip saw because of its cutting action. In my view, this vibration is about the same as I have experienced on other recip saws I have used. But it is not the kind of tool that I would use all day so you probably need not worry too much about vibration levels.
At the “business end” we have very robust housing covered with a slightly rubberised black plastic coating. Some tradespeople who tried it liked the bulkiness as it gave them something to hang on to. In truth, I found it pretty much the same as any other recip saw I have used and the design allowed my left hand to guide and aim the saw accurately where I wanted it to cut. Also on the “nose” of the saw, are the tool holder lever, the front shoe adjuster and the orbital stroke switch. I also liked the inclusion of a bright LED light right on the front end where it does a good job of illuminating the workpiece should you need it.
A good blade is worth the money on a recip saw and I started with a fairly fine-toothed metal cutting blade to cut up the couple of old uPVC window frames that needed dumping. I had set aside about twenty minutes for the job because they were large frames and I have a small car. The Flex was so efficient that I finished in fifteen minutes. Both plastic outer frames and internal steel strengtheners of the windows were cleanly cut without drama.
On another day with a bigger toothed and longer blade I tackled the quince tree – again I was very happy with the rate of progress. In the end, most of the tree was taken down to ground level simple because it was easier and I had a few encouragements from my neighbour to get rid of it completely.
I also ended up using the Flex on site to cut through the rusted screws holding the ply roof of a brick built shed and then cutting up the ply into sizes small enough to fit in my car. Demolition is truly the forte of recip saws and this tool has no reason to feel ashamed of its performance.
Some specs might help put all of the above into a real context. The retail price is around £110, so it is very competitive for a “real” trade rated tool. The RS 29 will cut 18mm thick metal, 100mm metal pipes, 200mm plastic pipes and 180mm thickness of wood – basically pretty well the sort of things that the average worksite will throw up.
In my view, the Flex RS 29 18 covers all the bases and the Flex 18v cordless system is as well thought out as most of the competition – so for a competitive price you will get a capable tool with a future.