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post #1 of 7 Old 02-10-2015, 07:47 PM Thread Starter
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Educate me please!

I have a small project and I will be using 1/2 in MDF and I need to make a very strong right angle joint. What type of joint should I use? I am thinking using my router and make a finger joint (not sure if that is correct)? I dont have a dado blade for my table saw.
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post #2 of 7 Old 02-10-2015, 09:56 PM
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On MDF I would just miter the joint and put a spline in it.
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post #3 of 7 Old 02-10-2015, 10:43 PM
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Finger joints dont work in MDF. Material just isnt strong enough. Im with steve (again), butt joint with a spline

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etsy.com/shop/projectepicfail
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post #4 of 7 Old 02-11-2015, 06:14 AM Thread Starter
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so from what I gather a spline is just some other material riding in a groove between the 2 pieces?
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post #5 of 7 Old 02-11-2015, 07:20 AM
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Yes the spline can be made of solid wood. The cut can be 1/8" wide like your saw blade already set up on a 45 degree angle.
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post #6 of 7 Old 02-11-2015, 07:50 AM Thread Starter
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I should make the groove 3/8in deep each side then use a 3/4 wide strip for the filler board?
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post #7 of 7 Old 02-11-2015, 08:32 AM
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Make the groove closer to 13/32" deep so there is a little wiggle room. Otherwise the glue will hold the joint apart.
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