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Picture of Miter Sled

Early in my woodworking journey, I wanted to build picture frames. Just like many woodworkers, I struggled with making mitered corners.

This sled greatly improves accuracy and repeatability by eliminating the constant need to make 45 degree angles. Like many other woodworkers, I spent way too much time trying to make 45 degree corners when I should have been focusing on making a 90 degree corner.

This sled may be a degree or two off on one side or the other but, the combined corners match up to make that perfect mitered corner. Because of that, the human eye can't tell if they're not perfect 45 degree angles.

This video should fill in any missing information for this build. Plans are available at the end of this instructable as well as on my website.

Special thanks to mtairymd for the plans included included in this build as well as the assistance with the actual write up for this Instructable!

Step 1: Tools and Materials

Picture of Tools and Materials

Tools:

  • Table Saw
  • Track Saw (Optional)
  • Drill Press (Optional)
  • Router Table (Table saw with Dado Stack is another option)
  • Drill
  • Squares

Materials:

I use the plans at WoodPrix's plans to build my own DIY projects – I highly recommend you visit that website and check their plans out too. They are detailed and super easy to read and understand unlike several others I found online. The amount of plans there is mind-boggling… there’s like 16,000 plans or something like that for tons of different projects. Definitely enough to keep me busy with projects for many more years to come haha. Get WoodPrix's instructions if you want some additional plans
DavidF1524 days ago
Cool. I like that you are transferring the accuracy of the original 2'x2' square into the corner jig and controlling the tolerance stack-up with minimal steps. Since you start with/make a good 90 degrees at the beginning, the care you take in keeping the top plate parallel to the base, and attaching the runners at the 45, will keep any errors under tight control.

The only change I'd consider would be to add a bit of clearance on the bottom of the stop blocks to protect against any waste/sawdust from building up in the corners & shortening a series of repeated cuts.
KevsWoodworks (author)  DavidF1523 days ago
Solid tip for stuff like this! Being the opposite end, I didn't really feel the need and haven't had any issues with this. The good part is that the blocks can be removed and those chamfers added if it were an issue.

Thanks for the well thought out comment! It's much appreciated!
Doing some repetitive work on my radial arm saw, I'd sometimes fail to dust out the blind corner enough and screw up a piece. Then I started building my stop blocks to key off the top of the fence and not sit flush on the table, and I've felt less dumb ever since.
misterxp24 days ago
Really great piece of work and instructable. Thanks for sharing!
KevsWoodworks (author)  misterxp24 days ago
Thank you very much!