Llama Posted August 27, 2016 Report Share Posted August 27, 2016 2 hours ago, gee-dub said: Remove the clamp so that the crack reopens. Put glue or epoxy in the crack and re-clamp. Run your screw in recessing the head below the chair's edge surface. This is key. Use the clamp to bring the gap in, use the screw to keep it closed. Do not use the screw to close the gap without clamps. Also be sure to drill your pilot hole with the chair clamped. Seriously great advice geeeeeeee-dubbbbbbbbbb! 1 Quote Link to comment Share on other sites More sharing options...
Mark J Posted August 27, 2016 Report Share Posted August 27, 2016 11 hours ago, Gillian Cordiner said: I'm in Australia sure there will be a version here thanks though I learn quick and my mind likes information !! Wait, our newest member is both female and Australian. How AUSsome is that! 3 hours ago, gee-dub said: The long hole should be sized for your pan head or round head screw (not flat head). Great advise and clearly put (even I understood it). But question, why not a flat head screw? Quote Link to comment Share on other sites More sharing options...
Llama Posted August 27, 2016 Report Share Posted August 27, 2016 38 minutes ago, Mark J said: flat head screw Flat head screws have a taper under the head that acts like a wedge which will split the material you're going into. You can use a flat head, but you have to countersink them. If there is another reason, lemme know Quote Link to comment Share on other sites More sharing options...
Popular Post gee-dub Posted August 27, 2016 Popular Post Report Share Posted August 27, 2016 57 minutes ago, Mark J said: Great advise and clearly put (even I understood it). But question, why not a flat head screw? 22 minutes ago, Llama said: Flat head screws have a taper under the head that acts like a wedge which will split the material you're going into. You can use a flat head, but you have to countersink them. If there is another reason, lemme know That is exactly it. A pan head, round head or better yet a washer head screw gives you a flat bearing surface. Even though the crack will be glued and clamped before the screw is seated, the clamp eventually comes off. The screw is your mechanical helper left behind. The torque that can be applied when someone settles back against the upright will be significant. The screw is running with the grain as opposed to against it so the possibility of a wedge causing a separation of the fibers leading to a new split is a real consideration. A nice flat bearing surface will have better resistance to any movement that should try to come along down the road. I'm hoping that lots of simple little steps lead to an overall successful repair. 4 Quote Link to comment Share on other sites More sharing options...
Gillian Cordiner Posted August 28, 2016 Author Report Share Posted August 28, 2016 8 hours ago, gee-dub said: That is exactly it. A pan head, round head or better yet a washer head screw gives you a flat bearing surface. Even though the crack will be glued and clamped before the screw is seated, the clamp eventually comes off. The screw is your mechanical helper left behind. The torque that can be applied when someone settles back against the upright will be significant. The screw is running with the grain as opposed to against it so the possibility of a wedge causing a separation of the fibers leading to a new split is a real consideration. A nice flat bearing surface will have better resistance to any movement that should try to come along down the road. I'm hoping that lots of simple little steps lead to an overall successful repair. This makes sense and honestly properly this is all new to me but I'm determined to save this chair if I can.. How long should the drilled hole be compared to the screw .. Don't laugh at my complete hopelessness ? Quote Link to comment Share on other sites More sharing options...
..Kev Posted August 28, 2016 Report Share Posted August 28, 2016 6 minutes ago, Gillian Cordiner said: This makes sense and honestly properly this is all new to me but I'm determined to save this chair if I can.. How long should the drilled hole be compared to the screw .. Don't laugh at my complete hopelessness ? As deep as the screw is long. Also, a little wax on the threads will help when you drive the screw. Quote Link to comment Share on other sites More sharing options...
Ryan Grondin Posted August 28, 2016 Report Share Posted August 28, 2016 13 minutes ago, Gillian Cordiner said: This makes sense and honestly properly this is all new to me but I'm determined to save this chair if I can.. How long should the drilled hole be compared to the screw .. Don't laugh at my complete hopelessness ? Same depth as the screw length. Quote Link to comment Share on other sites More sharing options...
Popular Post Gillian Cordiner Posted August 28, 2016 Author Popular Post Report Share Posted August 28, 2016 Ok I'm going to practice on spare wood till I feel confident... Baby steps? 4 Quote Link to comment Share on other sites More sharing options...
Coop Posted August 28, 2016 Report Share Posted August 28, 2016 51 minutes ago, Gillian Cordiner said: This makes sense and honestly properly this is all new to me but I'm determined to save this chair if I can.. How long should the drilled hole be compared to the screw .. Don't laugh at my complete hopelessness ? Your determination way out weighs your hopelessness! I think this is doable (sp?) for Ya! 1 Quote Link to comment Share on other sites More sharing options...
Gillian Cordiner Posted August 30, 2016 Author Report Share Posted August 30, 2016 On 8/27/2016 at 10:43 PM, gee-dub said: I got to a PC with SketchUp. This is quick and rough but, may make my ramblings clearer. brilliant i love an illustration makes it crystal clear\ On 8/27/2016 at 10:43 PM, gee-dub said: I got to a PC with SketchUp. This is quick and rough but, may make my ramblings clearer. brilliant i love an illustration makes it crystal clear\ 1 Quote Link to comment Share on other sites More sharing options...
gee-dub Posted August 30, 2016 Report Share Posted August 30, 2016 On 8/27/2016 at 6:08 PM, Gillian Cordiner said: This makes sense and honestly properly this is all new to me but I'm determined to save this chair if I can.. How long should the drilled hole be compared to the screw .. Don't laugh at my complete hopelessness ? On 8/27/2016 at 6:15 PM, TIODS said: As deep as the screw is long. Also, a little wax on the threads will help when you drive the screw. TIODS is right on with this. In many cases we leave the hole shorter than the screw so that the last few threads bite into solid wood. In your case you are screwing into side grain in a compromised area so a hole the full depth or even a bit more than the screw length is the ticket. This is similar to the method used when putting screws into MDF to avoid splitting. Good luck, your determination will keep you patient and focused. P,s, Just in case we haven't mentioned it, don't "test sit" the chair for at least 24 hours after the last glue, clamp and screw application. Quote Link to comment Share on other sites More sharing options...
Gillian Cordiner Posted September 3, 2016 Author Report Share Posted September 3, 2016 Ok sorry for delay I've been plucking up courage to tackle my knarley chair so today I thought bugger it I'm doin it but as I inspected it it looked totally wobbly so I decided I'd take it apart I have an old leather Mallet I use for my silversmithing a few knocks in the right order bingo it's apart then I decided to split chair pan as it looked to be pinned together so I think I can replace a dowel and re glue should I still screw the other crack here are the photos that show my bold anarchy Quote Link to comment Share on other sites More sharing options...
treeslayer Posted September 3, 2016 Report Share Posted September 3, 2016 nice work Gillian, thats what i would have done (and have done in the past), clean up the joints with some 150 grit sandpaper, test fit and re-glue. a lot of those old chairs were put together using hide glue and i gets very brittle with time and won't hold anymore, keep us posted 1 Quote Link to comment Share on other sites More sharing options...
Popular Post -MattK- Posted September 3, 2016 Popular Post Report Share Posted September 3, 2016 3 hours ago, Gillian Cordiner said: oh the old " put the dowel where you're going to drill through for a leg later" - they obviously stole that from me. 3 Quote Link to comment Share on other sites More sharing options...
gee-dub Posted September 17, 2016 Report Share Posted September 17, 2016 Hey Gillian! Where'd you end up with this? Quote Link to comment Share on other sites More sharing options...
Gillian Cordiner Posted September 17, 2016 Author Report Share Posted September 17, 2016 Gee-Dub thanks ive been working on alot of furniture last few weeks just about finished all 4 chairs. ill pop a pic up once complete, thankyou so much for your help it really was a great kick up the arse to get on with it. ive been gaining confidence and getting stuck in pic to follow x Quote Link to comment Share on other sites More sharing options...
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