namluke Posted March 13, 2017 Report Share Posted March 13, 2017 Hi, I just bought a biscuit joiner (Cordless MakitaDPJ180Z) and im looking to join 3/4 inch ply on a 45-degree angle... what size biscuits should i use? And how do I figure out what sizes to use on future projects? Many Thanks Quote Link to comment Share on other sites More sharing options...
lewisc Posted March 13, 2017 Report Share Posted March 13, 2017 I use size 20 for gluing up boards. The size 20 is probably too big for the 45 degree join. Quote Link to comment Share on other sites More sharing options...
namluke Posted March 13, 2017 Author Report Share Posted March 13, 2017 So would you say a size 10? Quote Link to comment Share on other sites More sharing options...
lewisc Posted March 13, 2017 Report Share Posted March 13, 2017 I've never done that join with biscuits. Do some test pieces to see how deep the slots go. Size 10 is a bit smaller though. Quote Link to comment Share on other sites More sharing options...
Ckrauter Posted March 13, 2017 Report Share Posted March 13, 2017 http://www.rockler.com/biscuit-cutter-gauge Quote Link to comment Share on other sites More sharing options...
sheperd80 Posted March 13, 2017 Report Share Posted March 13, 2017 Youll just have to test it out on scrap. Id say use the biggest one you can fit as long as it doesnt get too close to coming through the other side of the piece. Sent from my SAMSUNG-SM-G890A using Tapatalk Quote Link to comment Share on other sites More sharing options...
wdwerker Posted March 13, 2017 Report Share Posted March 13, 2017 I made a gauge. I cut every size slot along the edge of a board then ripped the board to just leave the slots and the wood behind and between them . The depth of your slot at 45 degrees is dependent on how far away from the point you can set the fence. Set the fence and check it for parallel to the base of the tool. Even a slight bit crooked will affect a 45* corner. Like Shep said test on scrap ! Quote Link to comment Share on other sites More sharing options...
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