Prazi12" Beam Cutter Attachment for Non-Worm Circular Saws – Model PR2700 for 7-1/4" Circular Saws, Non-Worm Drive – American Owned Company – Increase Cut Depth from 2-1/2” to 12”

After much research decided on the Prazi PR-7000 for my Makita 5377 MG. Was prepared for a multi-page installation thesis that would make a research engineer happy but was pleasantly surprised at the clarity and brevity of the instructions, that made me happy.With a small amount of fiddling, and a couple of texts to Bob & Michelle to confirm some language used, since I'm kinda nerdy on that stuff, everything fit as described. Bob & Michelle were very responsive.Cut and fitted some railroad ties including a 45 degree miter end cut. See pics. Worked great, cut straight and fast for the application.I think it's a great product!Thanks PRAZI.

This product has worked really well for us as we build many structures out of timber. The install was easy, especially after learning the slide guard needed removed, and it cut well straight out of the box to the point where it didn’t even need the chain adjusted before using. Seems well-built and well thought-out!

Can't say enough good things about the build quality of this tool. Cuts through 6x6 treated posts like butter and holds remarkably true from end to end. Worth every penny for a big jobs (or consistent need).

So I didn’t give a full 5 stars for these reasons:REGARDING 12” model: on a 12x12 beamThe chain & base are rather thin & in order to get precise cuts with no fraying/splinteringthe chain needs sharpening quite often. A simple chainsaw sharpener will work great (kits come with 3 files & a base to hold chain in place. Takes some time, but you can get it much sharper than how it comes from seller)Install was a little finicky on one of my Skilsaws, didn’t work on my Makita, but finally worked on my 2nd Skilsaw.Overall it’s a pretty decent tool, it’s much cheaper than buying/renting a beam cutting saw (16” Makita) and saves me the trouble of doing cuts on various faces of a large piece of wood.That being said, I’m using this Prazi blade as a means of cutting 1” thick pieces of end grain off of a 12x12 beam. It’s doing the job but it requires a lot of maintenance to rip through a heavy piece of lumber like this.If you’re a hobbyist or doing 1 or 2 jobs this is a great and relatively inexpensive tool to have (beam saws go up to the $700-800 range for large quality tools and generally cut up to 6 3/4 inches).I still have about 44” of wood to cut with this little Prazi attachment, I hope it can do the job.ONE THING TO NOTE!!!Being that my project is a heavy piece of lumber, I may be pushing this Prazi blade too much. One of the photos I attached shows one of the bolts that holds the chain base to the worm drive fitting (which in turn attaches to your circular saw). It broke on Friday afternoon & I was forced to replace it with a machine screw from the local steel shop. Ive also attached a photo showing that the threads are starting to strip on the attachment itself.All in all, pretty good product, just be aware that not every circular saw is the same so do your research before you order. Also, if you are trying to cut thicker pieces than 12” I would suggest going with the 18” model made by Prazi.If Prazi products don’t work for you, there’s a lot of information out there on rigging a chainsaw to a jig made of 2x4s to get precise and level(ish) cuts.Work safely

I had intended to install this on a Rigid R32104 Worm Drive, mostly because of their lifetime warranty but it would not fit. After a conversation with Bob at Prazi I decide to mount it on a Skilsaw SPT 77. This worked out very well and installation was very easy with the exception of having to remove the lower blade guard from the saw. Adjustment of the Prazi Beam cutter was fairly easy and saw now cuts great. Very happy with the purchase and enjoyed talking with Bob at Prazi customer service.

I have a new saw I went and bought and a two year old DeWalt, didn't fit either one. Went and dug out a very old Ryobi I've had forever with a bigger bolt than supplied and it fit perfectly once I found a bolt that would fit out of my bolt bin. Cuts good but if your a novice user, make yourself a straight edge to get rid of the wavyness. It's also hard to see a line due to the chips that it throws up and guess that's to be expected. Other than that, it's a great tool to have, was surprised to see a chain adjustment because some of the others don't have one. just hope it lasts!

Just no.Cuts great first cut unfortunately every single bolt and screw will rattle out guess they don’t believe in locktite. After 2nd cut chain was loose went to tighten and snapped tensioning bolt off. Turns out the chain tension bolt’s threads are machined into soft aluminum and will strip out when you go to tighten it with minimal force. That was after the screws for riving knife rattled out and chain cut into it . They charge twice as much to build it in the USA then use the same cheap parts as the harbor freight model . Sent pictures of bolt stripped out they offered to replace if I paid for it. Sorry just gonna return

Finally got to use my beam cutter. Cut 3 stair stringers at the same time from from some 2" thick white pine that I milled from a dead fall. Couldn't be more pleased. Easily attached to my 50 year old Craftsman circular saw. Does not have a chain oiler, so i got a squirt can and filled it with bar and chain oil to lube the bar and chain.