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Sizing plastic runners


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Submitted on the old forum by keggers

I have plastic runners on the bottom of my panel sled. I've waxed everything there is to wax and they still fit way to snug making the sled pretty hard to move.  I've pushed the sled back and forth until my arms gave out with no success. So my question is to you more experienced woodworkers is - what's the best method of slimming the runners down a bit? I'm guessing sanding, but I thought I'd see if there was another method I haven't thought of. 
I've attached a picture in case that helps.

“If you don’t have time to do it right, when will you have time to do it over?”  John Wooden

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Follow up posts

1) I'll be using these runners on all the new sleds for the new saw so, am interested in the rest of the groups thoughts as well.

In the mean time, I think if I were in your shoes, I would be reaching for the sander as well.

2) Thanks for the reply, Kev. I have some adhesive backed rolls of sandpaper that I thought might work. I'm thinking I only need to sand one edge of each runner.

3) Before you get into sanding the edges you might try chamfering to bottom edges. Maybe you are getting some pinch in the corners of your miter slots.

4) I might try that first. Thanks!

5) I have tried sanding, block plane, router, table saw. All work, but a combination of block plane and sanding is best. Chet makes a good point about easing the edges. Even after you pre drill the sides can pancake a bit.

6) I'll chamfer the edges with a sanding block to see if that helps.

7) That should work.  Another thing that helps is take a sharpie and do 1 edge, the miter slots should scrape the marker off where it is tight, then you can just manipulate that section.

8) So what was your outcome? 

9) I ended up sanding and sanding and finally got the runners to move smoothly.

“If you don’t have time to do it right, when will you have time to do it over?”  John Wooden

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