I have had the Festool Kapex that A1Jim mentioned for several years and although it was expensive (the sting of the initial purchase has long been healed) I feel it was worth every penny and I am extremely impressed with its accuracy and quality.
All the brand name sliders are probably accurate enough
for cabinetmaking and trim carpentry… DeWalt, Makita,
Bosch. There's a race to the bottom going on though
like with Hitachi's new 8.5" sliding saw being an inferior
replacement for the 8.5" saw it is supposedly an
update of. All these companies have to build to
fit price points. Only Festool seems to be sparing
no expense. You might look into Mafell and Metabo.
I had a DeWalt 8.5" slider and found it very accurate.
DW712… they don't sell it anymore for some reason.
It's a nice tool.
I had a problem with my miters on the DeWalt, but solved it with a better blade.. A lot of he new saws come with construction grade blades. You might look into getting a better blade. As well you may need to tune her up a bit. Damn things travel all the way from China, so give the poor saws a break.
I believe all mitre saws can be made accurate. I have been using a 10" Lowe's/Kobalt slider for years. I ripped a sacrificial strip of maple for an insert in the bed of the saw, removed any and all extraneous "features" bolted it to a homemade bench of MDF, 2X2 with 6X28 inch rif sawn oak boxes on either end to match the height of the saw bed. The box risers are 3 1/2 high, the back riser is 5 1/2 so now I can lay in any stock length and cut to size.
I do check blade square in both directions and always get square cuts with a 60 tooth finish blade. No fussing, I use a 6" Swanson construction grade stair triangle (also available @ Lowe's 6 bucks). Truth be known, there is no blade guard to get in the way of the square; dangerous but there is also no one in this shop but me and I am acutely aware of all risks. Additionally no stock gets crosscut until AFTER it has been dressed minimum two sides even 2X gets planned/jointed; I build primarily in hard maple, walnut , qtr-sawn oak and alder any 2X would be utility stock.
Miters on a Slider: Again the construction grade Swanson does the trick every time. I verify with a scrap cut. A combination of the Wixey Digital and bevel gauge can also be used to dial in a perfect 45^.
After replacing original blade without even trying it, and fine tuning all functions, my 10" slider cuts perfect angles every time. Does not matter if I am framing a deck or a picture, my Harbor Freight is dead on accurate. $79 (second one due to my Son confiscating the first)
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