Hi All, Here is a method for slitting brass saw backs, http://www.backsaw.net/cpg/thumbnails.php?album=20 Regards Ray
Hi Ray, nice looking gauge. I wonder how to use it. If used with a saw file wouldn\'t it be destroyed? Do you stick something on the site of the file wich touches the gouge? Cheers Pedder Edit: sorry, wrong thread.:S
Thanks Ray. This looks like a very practical way of doing it. I would guess that your drill press table is raised and lowered for course adjustment and you shim the timber jig for fine? Thanks for the insight. Kevin
Hi Kevin, A bit of additional info, the bottom of the arbor that holds the blade is resting lightly on the wooden block, (drilled out with a forstner bit to the right depth. The idea here is that I don\'t want the saw to drop out of the morse taper, if it does, I don\'t want it to go anywhere. A drill press is not really designed for side loads, so the hole helps take up some of the side load as well. The next version, I will put a bearing under it, and the drill chuck is only tightened late in the setup. One other thing, I cranked the drill press down as slow as it would go, and backed off the belt tension so in the event of a jammed blade it just spins. I plan to do a more detailed write-up, maybe make a full article for the website. Regards Ray
Where can you get a blade and mandrel like that? I haven\'t seen them before. I thought about the abrasive cutting wheel but I think they would get too hot.
Hi mranum, I got mine off ebay (that\'s the el-cheapo way), since I\'m only slitting brass I went with the cheap option. Here is the arbor http://cgi.ebay.com.au/SLITTING-SAW-SLOTTING-SAW-HOLDER-WITH-1-2-SHANK-NEW_W0QQitemZ380110696282QQcmdZViewItemQQptZAU_BnI_Woodworking_Metalworking?hash=item380110696282&_trksid=p3286.c0.m14&_trkparms=66%3A2|65%3A1|39%3A1|240%3A1318 if that link is too long try.. http://tinyurl.com/d383rk and do a search for \"slitting saw\" you should find whatever blade thickness you need. A better quality selection of slitting saws and arbors from a good engineering supply house like, http://www.victornet.com/cgi-bin/victor/productlist.html?subdepartments=Saws,+Plain+Slitting:658,661 or shorter version... http://tinyurl.com/ctv7ah Regards Ray
Once you have the back slit, how do you mount the blade? Epoxy, pin, or press the assembly together, any of the above? I would assume a press fit or epoxy would be the best choice cosmetically for the final finish.
Hi mranum, I just clamp the slit brass in the vise with cauls either side and squash the 20thou slot a little to provide an interference fit. You can use a little bit of loctite as well if you want. Not necessary in my experience. Regards Ray
Ray, Lee Valley has a Drum-Sander Support System for drill presses that could probably be adapted to your slitting saw, or at least give you an idea to build your own. http://www.leevalley.com/wood/page.aspx?c=2&p=20202&cat=1,42500
I got an 1/2 arbor and slit blade from McMaster and mounted it in my router table. Turned the speed way down and made a sled to hold the brass (and save my fingers). I make about 3 passes to slit the 1\" brass bar stock. Works like a charm. I\'ll post pics in a day or so. Robert