Dado sled problems

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Forum topic by Azul531 posted 04-11-2015 10:30 AM 1122 views 0 times favorited 3 replies Add to Favorites Watch
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4 posts in 1429 days

04-11-2015 10:30 AM

Hi folks,

I’ve built a nice dado sled using clear instructions online. All recommend using hard plyboard to make the base of the sled. However, plyboard varies slightly in thickness and sometimes even has slight curves or warps. I didn’t notice this until I used my sled and the dados varied in depth and were also slightly off. I’ve checked all the table saw settings,so its definitely the sled. My new idea is to make the base out of thick hardwood that i can plane and trim perfectly to square myself. I’ve got a nice thickness planer and joiner for this. What do you think? Has anyone else run into this problem?

3 replies so far

View bbasiaga's profile


1234 posts in 2019 days

#1 posted 04-11-2015 10:50 AM

MDF? pretty flat and stays that way.

-- Part of engineering is to know when to put your calculator down and pick up your tools.

View SuperCubber's profile


1026 posts in 2308 days

#2 posted 04-11-2015 12:48 PM

I’ve always used plywood for sleds without any issues. I would either try to find some better quality plywood, or, as bbasiaga suggested, use MDF.

If you are using 1/2” plywood, you may have better luck by switching to 3/4”.

-- Joe | Spartanburg, SC | "To give anything less than your best is to sacrafice the gift." - Steve Prefontaine

View RockyTopScott's profile


1186 posts in 3502 days

#3 posted 04-11-2015 12:54 PM

Get some MDF like bbasiaga said. I am in the process of building a panel sled for case work. Using 1/2” MDF , then I am putting laminate on both sides.

Save your hardwood for rails or the fence. Get some MDF.

-- “When you want to help people, you tell them the truth. When you want to help yourself, you tell them what they want to hear.” ― Thomas Sowell

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