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This is a unique tool for cutting accurate scarf joints in plywood up to 3/8" thick. Attaches easily to most circular saws and is simple to remove. The West System 875 Scarffer was designed by Gougeon Brothers, so you know it's not only a quality and useful tool, but also tailor made for use in marine construction.
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does the scarffer require a 71/2" saw in order to use on 3/8 plywood?
Yes, this will fit your Makita 7 1/4" saw. The scarffer fits most popular brands of saws where the baseplate outside of the blade is 1/2" or larger.
Am thinking of buying this jig to do on-site scarfs using a battery powered circular saw. Can anyone recommend a particular brand and model for this?
I bought this to mount on a spare regular saw (not cordless). I found the small base of my saw did not have sufficient surface area to successfully mount the screws for the saw guard. I wonder if you would have the same issue with a battery powered saw since they tend to be light weight.
I mounted the scarffer on a 7 1/4" craftman circular saw, you need a smooth surface to mount the scarffer and I think you need more power than most battery saw's will give you. I leave it on the saw permanently because it takes time to get it set up.
I'll sell you mine....a hand power plane is the best method...
I just took an old skillz saw from a yard sale and tack welded it on. No fuss just works every time I pick it up no adjustments that come undone in the middle of a cut.
can i cut 1/2" wood with it? with a 9" saw?
sorry john. i haven't used it yet.my project keeps being delayed.
John,I donÂ•Ã€_??t think using the West System 875 Scraffer mounted on a 9 inch circular saw, to create a scraf on Â•Ã€_Â•Ã€__Â•Ã€_Â•Ã€___ inch thick plywood, will work. The blade will extend well beyond the scraffer guide and guard making it impossible to cut the scraf and would be extremely dangerous. In the scraffer manual West Systems recommends for scraffing Â•Ã€_Â•Ã€__Â•Ã€_Â•Ã€___ inch thick plywood cut a two inch scraf and remove the remaining 2 inches with a hand plane. Hopes this helps.
The info with the scarfer says up to 3/8" is the limit I believe. I have not used it yet though, so I don't know.
John, No, 3/8" is about the thickest piece you can effectively cut. I used it for scarfing 9cm plywood to make 16' panels for a stich and glue boat and it worked great.
I have a Bosch worm drive; will the tool work with this?
If the scarffer fits the base plate it should work fine. My saw is an old Black and Decker similar to the one saw pictured in the ad.
The waffle pattern cast into the top of the base plate may give you some problem. You must drill the base plate to attach the scarffer and the grid may get in the way. A flat plate base is much easier to use and you should dedicate a saw to scarf with.
HANDY SYSTEMS OF VIRGINIA
Hi. I read that it works on up to 3/8 material but the instructions I have call for some 1/2" ply. Any chance the tool will work on this material?
Sorry, can't help you, have only used it on 6mm ply.
Deb,The scarfer (the saw as well) can be modified to make scarf joints on 1/2" or 12MM ply, but you'd be well advised to contact the Gougeon Brothers directly for EXACT instructions for your particular make of saw. The scarfer does an excellent job on 1/4" and 3/8" inch ply as advertised and I would recommend it. As a side note, MAKE SURE YOUR SAW ANGLE IS 7-1/2 DEGREES OR YOU WILL NOT GET AN 8 TO 1 JOINT. Regardless of what your blade angle guide says on your saw, keep tweaking it until you get a 2" joint. My Porter Cable says 9degrees but the joint turns out perfectly cut 8 to 1 joints. The same will apply to 1/2" ply.Good luck.Ralph P. Snohomish, WA
Deb you can do up to 1/2 per the instruction but since the blade will only cut thru a little over two inches deep at the angle the saw is set up for you have to finish the last bit of the cut with a hand plane.. I have no problem since all the wood I scarff is 1/4 inch..I use to do these joints by hand with a belt sander but this tool is simple and amazing.. I did have to buy a new Skill saw to get a base that was wide enough to drill the 4 holes required to mount the tool but it was worth it..
Your pretty much limited to 3/8 for scarfing with one cut. If you are willing to do some hand-work then you can probably make 1/2 inch work. The instructions tell you how to do it, although I haven't tried it yet.
HANDY SYSTEMS OF VIRGINIA
Will the scarfer work on 1/8 inch birch skins?
I would say yes John, with the caveat that you have set up and assembled the scarffer onto your saw with care. In addition a thin kirf 60 tooth finish blade will help with the cut.
HANDY SYSTEMS OF VIRGINIA
Great tool but requires skill to setup a
I bought the West System scraffer after trying to use a hand plane to scraf joints in plywood. I just wasn't happy with the results I was getting using the hand plane. After a few practice runs using the West Systems Scraffer I was able to make nice clean, consistent scrafs. You do have to carefully mount and clamp the plywood to a sturdy work surface or table as described in the owner's manual. Once setup it takes less than a minute to make a quality scraf cut.The thing that gave me the most trouble with the West System scraffer was mounting it to my skill saw. It requires drilling five holes into the saw's base plate. I found clamping and drilling the new mounting holes difficult and tedious.
Scarffer - GREAT product
I used this to scarf 3/8" plywood to make 2'x16' pieces for planking. Once set up it was extremely easy to use. It was quick. And, most importantly it made a PERFECT scarf that required no additional work. I tell my friends it is the best tool I have for it's intended purpose.
Takes patience and practice
Pre drilled holes in scarfing unit did not match the base plate of the Milwaukee circular saw making the unit fussy to install. Scarf cuts seem to be reasonably accurate though the addition of the guide makes the assembly very heavy. New users should practice before making cuts on expensive marine grade plywood. Also, a carbide tipped finish quality blade should be used.
Good product - but instructions correct?
The setup instructions may be in error. The recommended blade angle and clearance were not eve close (I needed 0 degrees and near 0 clearance for an 8:1 scarf.), but after some experimentation, I got near perfect results.
Orange County, CA
A very handle tool
This tool or jig really simplifies cutting a tricky joint. All you need is a standard skill saw and this unit and you are good to go. A long scarf makes for a super strong glued joint.