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Full extension drawers #1: Prototype

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Blog entry by yuridichesky posted 221 days ago 1017 reads 2 times favorited 8 comments Add to Favorites Watch
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Guys and gals, I need your advise.

I’m cooking my underbench chest of drawers to store some tools. And I’m dreaming about full extension drawers.

Here’s what I’m up to so far: half-wooden shop-made full extension slides.

Two aluminum extrusion profiles and wooden runner:

The extrusions are cut in flash into carcase wall and drawer:

I think whole idea is more or less clear, anyway see some pictures of drawer in action.

Fully closed:

Opening:

Opened:

The screws protrude through wooden runner and work as stoppers: the runner travels halfway through carcase wall and halfway through drawer side.

The chest (about 20” wide and 15” deep) will be made out of pine. If it would be some hardwood I think I’d go for sliding dovetails instead of aluminum profiles.

The runners will be some hardwood (oak or beech – which one is better BTW?), cross-section about 3/4”x3/4”. Also I’m thinking about putting some teflon tape onto runners to decrease friction.

Do you see any flaws in this design?

Do I need to seal the pores of wooden runners to prevent them from season expansion/contraction?

What is better: to glue aluminum extrusions in or to secure them with the screws (again thinking about wood movement)?

All your critiques, opinions, suggestions are very much appreciated.

-- Yuri (10x4 -- yeah, that's my tiny shop!)



8 comments so far

View Sergeich's profile

Sergeich

60 posts in 428 days


#1 posted 221 days ago

Wow! I never saw befor selfmade full extension slides! Yuri, is your life credo Never buy anithing you can make yourself? :) I am the same in most aspects. As for me I prefer always make details from wood if it possible. Dovetails rule. Regarding beech and oak from my experience (not too big) beech is more flexible. It is good feature preventing breaking details during usage. Oak is oak. It’s always good.

View Boatman53's profile

Boatman53

836 posts in 828 days


#2 posted 221 days ago

Very nice Yuri. You might try just waxing the the wooden runner instead of the tape. Wax will also protect it from moisture
Jim

-- Jim, Long Island, NY Ancorayachtservice.com home of the chain leg vise

View yuridichesky's profile

yuridichesky

315 posts in 595 days


#3 posted 221 days ago

Sergey, thank you. I’m not sure that I’d go for this shop-made slides if I’d have ready for use full-extension slides available around. Speaking about woods: oak tends to split, beech tends to twist when moisture changes. Still not sure about woods…

Jim, thanks. Yes, I think about waxing as an option. I waxed wagon vise parts (well, not waxed in fact but used candle paraffin and heat gun to let the wood soak it) and it works just fine for almost year already.

-- Yuri (10x4 -- yeah, that's my tiny shop!)

View Mosquito's profile (online now)

Mosquito

4624 posts in 924 days


#4 posted 221 days ago

That’s a great idea!

-- Mos - Twin Cities, MN -- Stanley #45 Evangelist - www.youtube.com/MosquitoMods

View Jorg Zimmermann's profile

Jorg Zimmermann

12 posts in 238 days


#5 posted 221 days ago

I’d use Beech wood for the runner not oak, in general wood with fine pores doesn’t wear off as much as oak for example, just think of sanding paper. I had to build full extension drawers on my exam piece made entierly from wood. Similar construction. I used Beech and Maple. I don’t think you have to worry so much about the expansion of the wood after all the dimension of the runner is not really big so the change in dimension is tolerable. Assuming a maximum of 10% Humidity change in the wood that wood make not even half a milllimeter difference between dry season and wet season. The wax I would see useful to make the running smooth. I would screw the Aluminium in but make sure you sink the screw heads in very well!

Jorg

-- Jorg

View TopamaxSurvivor's profile (online now)

TopamaxSurvivor

14723 posts in 2307 days


#6 posted 220 days ago

Interesting idea.

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View yuridichesky's profile

yuridichesky

315 posts in 595 days


#7 posted 220 days ago

Mos, you are kind man, thank you!

Jorg, thank you for thoughtful answer. All-in-wood design looks pretty attractive, and I’m thinking in this direction too.

-- Yuri (10x4 -- yeah, that's my tiny shop!)

View GOOD LUCK TO ALL's profile

GOOD LUCK TO ALL

418 posts in 359 days


#8 posted 217 days ago

I would probably use a hardwood like maple for the runner.
Not sure if it’s the best or not but probably what I would try if I were doing it.

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