tag:blogger.com,1999:blog-5591297260116621731.post2504617516125360591..comments2024-03-09T22:40:48.096+01:00Comments on Toolerable: French Heavy MetalBrian Evehttp://www.blogger.com/profile/04252174035715635674noreply@blogger.comBlogger15125tag:blogger.com,1999:blog-5591297260116621731.post-5836276680203971662015-03-24T13:13:42.390+01:002015-03-24T13:13:42.390+01:00That video is great! Right before I first watched...That video is great! Right before I first watched it, I used a circular pipe cutter with a steel blade to roughen up my Gramercys. It leaves a sharp little edge, and I put them about 1/4" apart all up and down. It seems to work.Brian Evehttps://www.blogger.com/profile/04252174035715635674noreply@blogger.comtag:blogger.com,1999:blog-5591297260116621731.post-37254870620082065432015-03-24T12:55:19.210+01:002015-03-24T12:55:19.210+01:00Richard Maguire, "the English woodworker"...Richard Maguire, "the English woodworker" has an interesting video about "texturing" the Gramercy holdfast.<br />Search on his blog "holdfast" and look "holdfast - get a grip! Video".<br />( sorry with a tablet copy and paste is a pita)<br />It works in is thick bench without doing a larger hole.<br />I have also read on a forum that wacking the gramercy holdfast on the oblique part instead of on the top works better.<br />So there is room for experiment.<br />SylvainAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-5591297260116621731.post-72543924760395923622015-03-24T06:58:19.142+01:002015-03-24T06:58:19.142+01:00Hi Sylvain! Thanks for the comment. My math isn&...Hi Sylvain! Thanks for the comment. My math isn't nearly up to yours. Thanks for that formula. If I am figuring this out right, I should be drilling a hole around 1 3/4"! I never would have thought that. My plan was to start with something around the neighbourhood of 1 1/4".<br /><br />Perhaps this is why many people recommend to drill an oversize hole from the underside of the bench on holdfast holes in thick benches? This effectively reduces the thickness of the bench in use by the holdfast allowing a smaller diameter hole. That's what I did for my Gramercy holdfasts.Brian Evehttps://www.blogger.com/profile/04252174035715635674noreply@blogger.comtag:blogger.com,1999:blog-5591297260116621731.post-29627586291157134082015-03-24T05:00:44.992+01:002015-03-24T05:00:44.992+01:00Your mathematical approach is very interesting Syl...Your mathematical approach is very interesting Sylvain, I will keep it in mind... what about a tapered hole? It's what master Schwarz uses for his roubo monster holdfast made by Peter Ross...Aymerichttps://www.blogger.com/profile/11444138173834377709noreply@blogger.comtag:blogger.com,1999:blog-5591297260116621731.post-19918482747883356312015-03-23T11:55:06.171+01:002015-03-23T11:55:06.171+01:00The holdfast holds because the rod is askew in the...The holdfast holds because the rod is askew in the hole. (Pipe clamps work on a similar principle where the pipe is askew in the lamellaes). If I remember well, Chris Schwarz made some experiment (the mistery of holdfast 1 september 2005) and the best angle would be around 7°.<br />So if your holdfast has a diameter d and your bench has a tickness T, the hole should have a diameter D=d+x where x/T= tan 7° or x=0.123 T.<br />Sylvain<br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5591297260116621731.post-61420803492125898942015-03-23T09:30:04.796+01:002015-03-23T09:30:04.796+01:00Cool. Now I only need to find my 27.8638mm drill ...Cool. Now I only need to find my 27.8638mm drill bit. :o)<br /><br />I'm afraid I know no French curse words, but I'm willing to learn for the sake of this tool!<br /><br />Cheers!Brian Evehttps://www.blogger.com/profile/04252174035715635674noreply@blogger.comtag:blogger.com,1999:blog-5591297260116621731.post-870750688712665622015-03-23T08:41:15.158+01:002015-03-23T08:41:15.158+01:00Measure and drill metric. Unless that holdfast is...Measure and drill metric. Unless that holdfast is more than 215 years old, it is metric. And remember to curse it in French every time you have to lug it around. That way, it will feel at home with you.Cruising Trollhttps://www.blogger.com/profile/06634139626574078331noreply@blogger.comtag:blogger.com,1999:blog-5591297260116621731.post-45382487908955893262015-03-22T20:12:45.043+01:002015-03-22T20:12:45.043+01:00Good idea! I hadn't thought of that because b...Good idea! I hadn't thought of that because boring a 1 1/8" hole in 14cm of oak isn't something I like to do for practice, but it is better than drilling the hole in your bench for nothing!<br /><br />I just happen to have a little bit of offcut from the bench left.Brian Evehttps://www.blogger.com/profile/04252174035715635674noreply@blogger.comtag:blogger.com,1999:blog-5591297260116621731.post-26873920129162955132015-03-22T19:57:11.807+01:002015-03-22T19:57:11.807+01:00A nice piece of hardware indeed! My recommendation...A nice piece of hardware indeed! My recommendation is for you to find a piece of wood the thickness of your bench, and about 3 to 4 inches wide. Drill a 1"1/8 hole and use your bench vise to hold that piece of wood, and then try your monster holdfast to see if it's the correct size.Aymerichttps://www.blogger.com/profile/11444138173834377709noreply@blogger.comtag:blogger.com,1999:blog-5591297260116621731.post-62411409138674219322015-03-22T19:38:03.295+01:002015-03-22T19:38:03.295+01:00Hi Wolfram,
No metric holes for me!
Or, maybe I ...Hi Wolfram,<br /><br />No metric holes for me!<br /><br />Or, maybe I should, being from France, there is every possibility this is intended to be metric.Brian Evehttps://www.blogger.com/profile/04252174035715635674noreply@blogger.comtag:blogger.com,1999:blog-5591297260116621731.post-80083944099371909552015-03-22T19:30:55.387+01:002015-03-22T19:30:55.387+01:00Very nice piece of hardware!
I have drilled a few...Very nice piece of hardware! <br />I have drilled a few additional holes in my workbench since it is in use, but only on real demand. In addition to the 3/4 I have drilled a few 20mm holes for metric stuff.Wolframhttp://www.holzundleim.denoreply@blogger.comtag:blogger.com,1999:blog-5591297260116621731.post-79067730425822492662015-03-22T18:47:43.757+01:002015-03-22T18:47:43.757+01:00Lucky you!
I thought my 1" dogholes would wo...Lucky you!<br /><br />I thought my 1" dogholes would work for this one, but it is definitely too big for those. I think I'll have to take a look at my big brace bits to determine how big of a hole I need.Brian Evehttps://www.blogger.com/profile/04252174035715635674noreply@blogger.comtag:blogger.com,1999:blog-5591297260116621731.post-1684648596456167092015-03-22T18:41:40.152+01:002015-03-22T18:41:40.152+01:00That's one heckufa holdfast!
I would also kee...That's one heckufa holdfast!<br /><br />I would also keep the two existing holes, and drill some new ones for this one.<br />If you find you don't like it, you could always ship it to Denmark :-)<br /><br />For some unknown reason, I drilled 1.25" holes in my workbench for the dogs. So such a heavy holdfast would fit nicely in those.<br /><br />Cheers<br />Jonas<br />Jonas Jensenhttps://www.blogger.com/profile/07787393233185454227noreply@blogger.comtag:blogger.com,1999:blog-5591297260116621731.post-71233454838715944402015-03-22T18:24:33.444+01:002015-03-22T18:24:33.444+01:00Thanks, Robert! That's good advice. I alread...Thanks, Robert! That's good advice. I already have a wooden planing stop, it is a length of beech about 2" x 2" that is morticed in the top just past the front leg. I use that thing all the time. I haven't sank a metal planing stop in it yet, though. Perhaps another trip to eBay is in order!Brian Evehttps://www.blogger.com/profile/04252174035715635674noreply@blogger.comtag:blogger.com,1999:blog-5591297260116621731.post-68808029793343957732015-03-22T18:15:50.856+01:002015-03-22T18:15:50.856+01:00Good score! I would keep the 3/4 holes and make bi...Good score! I would keep the 3/4 holes and make bigger ones for your new holdfast. How many and where? That would depend a lot on how you work.<br />Next you need a metal planing stop to sink into a big wooden planing stop to complete your ensemble :-)<br />Bob, slowly emerging from the snowbanksValley Woodworkerhttps://www.blogger.com/profile/07322487171914484954noreply@blogger.com