Mounting full extension slides across grain

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Forum topic by oldnovice posted 08-04-2018 11:07 PM 598 views 0 times favorited 5 replies Add to Favorites Watch
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7517 posts in 3976 days

08-04-2018 11:07 PM

Topic tags/keywords: question oak drill-driver refurbishing

I was just updating a cabinet with Accurate full extention drawer slides on the solid wood sides of the cabinet and I was wondering, if I use all the mounting holes, if that is going hamper wood movement and cause other issues?

The drawer slides are 20” long and the cabinet sides are 3/4” 100+ year old red oak consisting of three edge glued panels.

-- "I never met a board I didn't like!"

5 replies so far

View sras's profile


5289 posts in 3737 days

#1 posted 08-05-2018 12:14 AM

Are there slotted holes in your slides? If not, you could always turn some into slots…

-- Steve - Impatience is Expensive

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6052 posts in 3017 days

#2 posted 08-05-2018 02:17 AM

Use the slots, I am sure they have them. Doubt it will ever give any trouble.

-- Live to tell the stories, they sound better that way.

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3508 posts in 2777 days

#3 posted 08-05-2018 08:41 AM

I think you can do it without any problem, but when you want to go for certainty…..................

the wood sides has to be flat and you have to use the slotted holes of the slides and drill holes in the wood sides before mounting the (truss head) srews. Than I can’t find a reason with can cause orther issues, with exception that screws can rust. BTW: drilling a correct corresponding hole for the srew makes the pull out strength better!


View splintergroup's profile


3215 posts in 1830 days

#4 posted 08-05-2018 01:51 PM


Most slides have slotted holes, Use one of the round (non-slotted) holes and screw firmly into the wood (a hole near the center is easiest) , in the remaining slotted holes, screw down snugly, but not overly tight so the screws can slide. For locating the screws in the slotted holes, you need to determine (guess) which way the wood will move (expand/contract) from its current position. In general, wood in winter will be fully contracted and wood in summer will be fully expanded. For expanded wood (summer), place the slotted gold screws on the inboard edges of the slots. For your wide panels, you probably should lengthen the slots furthest away from your primary mounting screw.

The shrinkulator says 20” of flat sawn red oak may expand up to 1/2”, but depending on the finish and your house conditions, more likely 1/4”

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7517 posts in 3976 days

#5 posted 08-05-2018 08:51 PM

Slots it is!
The oak panels have three coats of Minwax poly on the outside, inside and edges as this cabinet will be going into a machine shop and I want to protect it as much as possible from that environment.

-- "I never met a board I didn't like!"

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